Trek Rail+ Gen 5 e-MTB Lineup Shreds Trails with Big Upgrades - Full Comparison & Review

Trek’s Rail+ Gen 5 electric mountain bikes are turning heads in the e-MTB world. Launched as the 2025 model range, these enduro-focused machines pack major upgrades in power, battery capacity, and suspension travel. The new Rail+ Gen 5 series promises “all the power, range, and versatility an eMTB can offer” vitalmtb.com – but how do the different models compare, and can they outshine the competition? Below we break down the key facts, dive into each model’s specs and ride impressions, highlight expert review insights, and see how the Rail+ Gen 5 stacks up against other premium e-MTBs.

Key Facts – Trek Rail+ Gen 5 at a Glance

• All-New Gen 5 Frame & Geometry: The Rail+ Gen 5 introduces a brand new frame for 2025 with longer travel (160 mm front & rear, up from 150 mm rear on the previous gen) vitalmtb.com. It adopts a mullet wheel setup (29-inch front, 27.5-inch rear) for all sizes except Small (which is 27.5″ front & rear) trekbikes.com. Trek also added adjustable geometry via the Mino Link flip-chip and even an angle-adjust headset option, letting riders fine-tune head tube angle ±0.5° around a baseline ~64.5–65° head angle ebike-mtb.com theloamwolf.com. The result is a modern enduro geometry that’s slack enough for stability but not overly extreme – reviewers call it “fairly conservative” for keeping the bike agile and climb-friendly theloamwolf.com.
• Bosch’s Latest Motor & Smart System: All Rail+ Gen 5 models run the new Bosch Performance Line CX Gen 5 motor with 85 Nm torque and ~600 W peak power flowmountainbike.com. It’s significantly quieter, smaller, and lighter than the previous generation, with “sound-optimized gears for a quieter ride” and reduced pedal resistance vitalmtb.com flowmountainbike.com. The motor is part of Bosch’s Smart System, featuring a compact top-tube System Controller and handlebar Mini Remote instead of a large display flowmountainbike.com. Riders can connect the bike to the Bosch Flow smartphone app for customization and firmware updates – testers praised the smooth, intuitive power delivery in eMTB mode that offers “exceptional traction and intuitive power” on technical climbs theloamwolf.com. (Notably, a future Bosch firmware update is enabling an “eMTB +” mode with up to ~100 Nm for even more punch, though early tests found it a bit too aggressive without tuning theloamwolf.com.)
• 800 Wh Removable Battery & RIB 2.0: A huge 800 Wh Bosch PowerTube battery comes standard on all Gen 5 models, a bump up from 750 Wh on the previous gen trekbikes.com. Thanks to new high-density cells, the 800 Wh pack is actually ~0.4 kg lighter than the old 750, yet delivers greater range flowmountainbike.com. Trek designed a new RIB 2.0 (Removable Integrated Battery) latch system that holds the battery more securely and eliminates rattles vitalmtb.com. The battery now slides out from the bottom of the downtube (released with a hex key) rather than the side mount of older Rails flowmountainbike.com. This bottom-loading design is “more secure and rattle-free”, with an optional secondary tension bolt for extra rough rides vitalmtb.com. For epic adventures, the frame also supports Bosch’s 250 Wh Range Extender, enabling a whopping ~1,050 Wh total capacity flowmountainbike.com. (Conversely, weight-conscious riders can swap in a 600 Wh battery since the system is cross-compatible ebike-mtb.com flowmountainbike.com.)
• Suspension & Adjustability: The Rail+ Gen 5 is a true long-travel e-enduro bike with 160 mm of travel front and rear on all models trekbikes.com. Trek stuck with its proven ABP (Active Braking Pivot) suspension layout, but added a two-position leverage rate flip chip on the lower shock mount flowmountainbike.com. Riders can choose between 19% and 24% progression – the latter is ideal if running a coil shock and gives the bike more end-stroke support flowmountainbike.com. This adjustability, plus room for up to a 180 mm fork install, shows Trek’s intent to make the Rail+ versatile for different riding styles ebike-mtb.com. All models come stock with burly 160 mm single-crown forks (RockShox Zeb or Fox 38 depending on trim) and aggressive 2.5″ enduro tires. In reviews, the suspension is described as plush and forgiving – “beautifully balanced… offering great small-bump sensitivity” while still supportive when pushed hard flowmountainbike.com theloamwolf.com. However, one tester felt the stock suspension tune was a bit over-damped for big jumps, requiring effort to pop off lips ebike-mtb.com – something advanced riders might address with tuning or an upgrade.
• Model Lineup & Prices: Trek offers five main Rail+ Gen 5 models for 2025, with MSRP starting around $5,999 USD and topping out about $11,499 USD for the highest spec trekbikes.com. All share the same motor, battery, frame, and core tech – differences come down to frame material and component packages. The Rail+ 5 and 8 have aluminum frames, while the 9.7, 9.8, and 9.9 are OCLV Mountain carbon frames for lighter weight 99spokes.com 99spokes.com. Component levels range from Shimano Deore and RockShox base suspension on the Rail+ 5, up to wireless SRAM AXS Transmission drivetrains and premium Fox/RockShox suspension on the 9.8 and 9.9. (See detailed breakdowns below.) Trek notably re-branded the series from “Rail” to Rail+ to align with their new e-MTB naming (alongside the new Powerfly+ and Slash+ models) flowmountainbike.com. The “+” signifies it’s a full-power bike (as opposed to any future light-assist versions). Each Rail+ Gen 5 also comes with a lifetime frame warranty and 30-day satisfaction guarantee from Trek theloamwolf.com, underlining the company’s confidence in this new platform.
• Expert Verdict – Is Gen 5 Worth It? Early reviews indicate the Rail+ Gen 5 addressed many of its predecessor’s weaknesses. Flow Mountain Bike calls the new Rail+ “quieter, smoother & more adjustable” and “a better e-MTB in every way” flowmountainbike.com, praising its handling, suspension and the huge 800 Wh battery. The Loam Wolf found it “a solid performing and versatile enduro eMTB” with a “great blend of handling characteristics and stellar range.” theloamwolf.com They enjoyed its intuitive, confidence-inspiring ride on descents and effective climbing manners theloamwolf.com theloamwolf.com. On the flip side, E-MOUNTAINBIKE Magazine noted mixed feelings: the Rail+ is extremely fun and agile on flow trails, but in rough, high-speed downhill racing it doesn’t quite match the ultra-planted feel of some competitors (like Trek’s own high-pivot Slash+ or a Specialized Kenevo) ebike-mtb.com ebike-mtb.com. They also critiqued the hard-compound stock Bontrager tires for lacking grip and reported some cable rattle noise inside the frame ebike-mtb.com ebike-mtb.com. Overall, the Gen 5 Rail+ is seen as a big step forward – a bike that’s “a pleasure to descend in most trail scenarios” theloamwolf.com while remaining a capable climber and all-rounder, especially once a few tweaks (softer tires, suspension tuning) are made for aggressive riders.

Now, let’s break down each Rail+ Gen 5 model currently available, including technical specs, components, pricing, unique features, and ride impressions:

Trek Rail+ 5 Gen 5 – Entry-Level Alloy, Same Big Power

Rail+ 5 Gen 5 is the gateway into the Rail+ family, offering the full Gen 5 experience at the most accessible price point (around $5,999 USD MSRP for 2025) trekbikes.com. Importantly, the Rail+ 5 gets the same Bosch Performance CX Gen 5 motor (85 Nm) and 800 Wh removable battery as the pricier models, so you’re not sacrificing on power or range mtbmonster.com 99spokes.com. It also shares the exact same 160 mm travel alloy frame with all the new features – adjustable geometry, RIB 2.0 battery system, ABP suspension, mullet wheels, etc. mtbmonster.com. This means the Rail+ 5 delivers the full core performance of the Gen 5 platform; as one reviewer put it, Trek didn’t hold back on trickle-down tech: “across the entire range – all 2026 Rail+ receive the latest Bosch system… 800 Wh battery… larger suspension and aggressive geometry” mtbmonster.com.

Where the Rail+ 5 differs is in the components package. It’s built to a price, but still quite robust for an “entry” e-MTB. Key specs include:

• Frame: Alpha Platinum Aluminum (with same geometry & features as higher models) – weight is about 25.1 kg for size M 99spokes.com 99spokes.com.
• Suspension: RockShox fork & shock – typically a RockShox 35 Silver or “Psylo” Gold 160 mm fork (OEM spec) and a RockShox Deluxe Select+ rear shock 99spokes.com 99spokes.com. These give you the full 160 mm travel but with simpler damping circuits (no high-end Charger damper here). Even so, testers found the Rail’s suspension design offers a comfortable, plush ride out of the box theloamwolf.com.
• Drivetrain: Shimano Deore 1×12 speed group (M6100 series) with a wide-range 10–51T cassette 99spokes.com 99spokes.com. The crankset is an e-bike specific E*thirteen with 160 mm crank arms to reduce pedal strikes 99spokes.com. Deore may be Shimano’s entry MTB group, but it’s proven to shift reliably under load – useful with 85 Nm of assist behind it.
• Brakes: Shimano 4-piston hydraulic disc brakes (likely Deore M6120 calipers) with large rotors (203 mm). Stopping power should be ample; one review noted even the mid-level SRAM Code brakes on higher trims were complemented by 220 mm rotors for max braking on long descents ebike-mtb.com, so Trek clearly emphasized safety on the downs.
• Wheels/Tires: Bontrager Line Comp 30 alloy wheelset (29″ front, 27.5″ rear) with 2.5″ Bontrager XR enduro tires 99spokes.com 99spokes.com. The mixed wheel setup improves agility and gives more rear tire clearance on steep drops. The stock Bontrager tires are durable but were critiqued for hard rubber that can slip on wet roots ebike-mtb.com, so upgrading to a softer compound tire (e.g. Maxxis or Schwalbe) could greatly boost traction if needed.

Despite being the base model, the Rail+ 5 gets a proper dropper seatpost, alloy bar/stem, and all the fixings you’d expect on a modern mountain bike (tubeless-ready rims, etc.). It’s essentially the same chassis that reviewers have lauded for its balanced handling and stability theloamwolf.com, just with more affordable kit. As a result, the Rail+ 5 offers a terrific value for riders who want full-power e-enduro performance without a five-figure price tag. We’ve seen it described as “no slouch, complete with a RockShox fork and shock, and a complete Shimano [Deore] groupset” mtbmonster.com – ready to tackle tough trails from day one.

Ride Impressions: Given the shared DNA, the Rail+ 5 should exhibit the same general ride characteristics as the higher-end models: a very planted, confident feel on descents and composed suspension that excels on rough terrain theloamwolf.com. The hefty 25 kg weight actually contributes to stability, though it’s a bit “juggernaut” in tight maneuvers as noted by one tester of a similar build mbr.co.uk. On technical climbs, the powerful Bosch drive and relatively moderate geometry keep the bike manageable – just be mindful of that low bottom bracket over rocks (use the “High” geometry setting if pedal strikes become an issue) theloamwolf.com. All told, the Rail+ 5 brings the flagship performance to a wider audience, perfect for riders who prioritize getting the best motor and battery over having boutique components.

Trek Rail+ 8 Gen 5 – Alloy All-Rounder with Upgraded Components

Moving up the range, the Rail+ 8 Gen 5 is the top-spec aluminum model, sitting above the Rail 5. Priced around $6,999 USD trekbikes.com, the Rail+ 8 commands roughly $1k more, and for that you get significant component upgrades while still using the sturdy alloy frame. It’s an attractive choice for riders who want better suspension and drivetrain performance but don’t need a carbon frame.

Key spec highlights for the Rail+ 8 Gen 5:

• Fork & Shock: RockShox’s higher-tier enduro suspension. The Rail+ 8 comes with a RockShox ZEB Select fork (160 mm) up front and a RockShox Super Deluxe Select+ shock in back mtbmonster.com. The ZEB Select is a burly 38 mm-stanchion fork with the Charger RC damper – a big performance step up from the Rail 5’s base fork, offering more tuning and better high-speed control. Similarly, the Super Deluxe Select+ rear shock has a piggyback reservoir and more advanced damping than the non-reservoir Deluxe on the Rail 5 mtbmonster.com mtbmonster.com. In short, the Rail+ 8’s suspension is built for harder charging, with more consistent performance on long, rough descents.
• Drivetrain: A mix of Shimano XT and SLX 12-speed components mtbmonster.com 99spokes.com. Typically, it features an XT rear derailleur and shifter with an SLX cassette/chain to keep cost reasonable. This yields crisper shifting and higher durability compared to Deore. The gear range remains 10–51T, and the e-specific 160 mm cranks carry over. An Upgrade in braking also appears here: Trek equips the Rail+ 8 with SRAM DB8 four-piston brakes mtbmonster.com. The DB8 is a mineral-oil system similar to SRAM Code, known for reliable stopping power. With 200 mm (or 220 mm) rotors, you can expect confident braking on big mountain descents.
• Wheels & Extras: The wheelset stays as Bontrager Line Comp 30 alloy (mullet format). One benefit of the Rail+ 8 over the 5 is tubeless readiness out of the box – Trek ships all Rail+ models with tubeless rim strips and valves, and even pre-installs the tires tubeless with sealant from the factory mtbmonster.com. That means less hassle converting to tubeless – a nice touch for an e-MTB where pinch flats could otherwise be an issue. The Rail+ 8 also gets minor cockpit upgrades like the Bontrager Elite 35 mm stem and alloy handlebar (780 mm width) 99spokes.com, which are sturdier than the base Comp parts.

Despite the tougher kit, the Rail+ 8’s alloy frame keeps it relatively affordable and durable. It is a bit heavier than the carbon models – listed around 25.1 kg (M size) vs ~23.7 kg for a carbon Rail 9.7 99spokes.com. But on the trail, that weight contributes to a planted feel. As one rider on the Rail+ 8 commented, “the bike is proper. Rides very well… People hate the looks mainly” emtbforums.com – indicating the performance is on point, even if the chunky e-bike downtube aesthetic isn’t for everyone. The alloy frame is finished in cool colors like “Dark Star” (metallic black/grey) or a high-vis “Powersurge” green option 99spokes.com 99spokes.com.

Ride Impressions: The Rail+ 8 should ride almost indistinguishably from the carbon models in terms of geometry and suspension kinematics. The big differences are the component feel – the ZEB fork will handle big hits and repeated chatter better than the Rail 5’s fork, giving more confidence when charging through rock gardens. The improved shock with its piggyback will resist overheating on long downhill runs, maintaining support. These changes align with Trek’s intent to go “all-in on performance” for Gen 5 mtbmonster.com. Given the same motor and battery, the Rail+ 8 climbs and powers along just as effectively; at ~25 kg it’s not light, but the motor makes up for it, and the upright, comfy riding position was noted to benefit long rides ebike-mtb.com. If you’re an aggressive rider on a bit of a budget (or prefer the robustness of alloy), the Rail+ 8 Gen 5 hits a sweet spot with zero compromises in capability – it’s essentially the carbon 9.7’s build kit on a tough aluminum frame mtbmonster.com.

Trek Rail+ 9.7 Gen 5 – Carbon Frame & Balanced Performance

The Rail+ 9.7 Gen 5 is the entry into Trek’s carbon Rail+ models. At approximately $7,999 USD MSRP trekbikes.com, it swaps the alloy frame for a lighter OCLV Mountain Carbon frame while carrying a similar component level to the Rail 8. This model is all about giving riders that premium carbon ride quality and weight savings without jumping to the very high-end price tier.

Here’s what the Rail+ 9.7 Gen 5 offers:

• Carbon Frame: The 9.7 uses Trek’s OCLV Mountain Carbon for the main frame, rear triangle, and rocker link. This likely sheds a significant amount of weight (~1.3 kg) versus alloy. Indeed a size M Rail+ 9.7 weighs about 23.7 kg, a notable drop from the ~25 kg of the alloy models 99spokes.com. Riders can expect a slightly snappier feel and improved responsiveness thanks to the stiffer, lighter frame. Trek still employs alloy in sensible spots (e.g. lower shock mount, where added material aids heat dissipation). The carbon frame comes in some sleek finishes – e.g. “Navy Smoke” or “Slate” colorways with gloss and matte blends 99spokes.com – giving the 9.7 a high-end look.
• Suspension: The Rail+ 9.7 gets the same suspension components as the Rail 8: a RockShox ZEB Select 160 mm fork and Super Deluxe Select+ shock mtbmonster.com 99spokes.com. Trek didn’t downgrade the suspension on the 9.7, which means you get that burly ZEB and piggyback shock on a carbon chassis – a very capable combo for aggressive riding. The geometry flip-chip and coil-ready adjustable progression feature remain intact. Reviewers who rode the Rail+ noted the bike’s suspension is both “plush & poppy” flowmountainbike.com, smoothing out chattery trails yet still providing support to pump and play, so the 9.7 should deliver that same feel.
• Drivetrain & Brakes: Also mirroring the Rail 8, the 9.7 runs a Shimano SLX/XT 1×12 drivetrain (with XT shifter/derailleur) mtbmonster.com, and SRAM DB8 four-piston brakes with 200 mm/200 mm rotors (or 220 mm front) 99spokes.com. This is a solid mid/high-level kit – for instance, the XT shifting under load is useful on steep climbs when you need to drop to an easier gear without losing momentum (Bosch’s motor management and Shimano’s shift ramp design help here). The brakes will be reliable, though some riders might eventually opt to bleed them or switch to a higher-spec brake if they desire a firmer bite or lighter lever feel (the DB8 is SRAM’s more budget-oriented brake using mineral oil, but shares DNA with the proven Code series).
• Wheels: The 9.7 keeps the Bontrager Line Comp 30 alloy wheels (mullet setup). It’s worth noting that this is one area where the 9.7 doesn’t yet get carbon wheels – those come on the 9.9 model. But the Line Comp rims are tough and have a 108-point Rapid Drive hub, giving quick engagement which riders appreciated for technical climbs (less lag when ratcheting pedals) 99spokes.com 99spokes.com.

Overall, the Rail+ 9.7 can be seen as essentially the same spec as the Rail+ 8 but with a carbon frame. And that’s exactly how Trek positions it – a more “budget-friendly yet performance-focused build kit” on carbon mtbmonster.com. This makes it a popular choice for enthusiasts who want to save weight and get the feel of carbon without splurging on all the bling parts.

Ride Impressions: In terms of ride, expect the Rail+ 9.7 to feel lively and easier to throw around than the alloy versions, purely due to weight. Riders stepping up from heavier e-bikes will notice the ~1.5 kg savings when changing direction or popping over obstacles. The core handling remains “excellent across a variety of terrain” flowmountainbike.com – a hallmark of the Rail+ Gen 5 – with that low center of gravity from the motor and battery helping it corner like it’s glued to the dirt. One magazine noted the new Rail’s longer reach and slack-ish head angle give it high-speed composure, yet it still “feels more like a trail bike than a heavy-duty downhill machine” in terms of playfulness ebike-mtb.com. This describes the 9.7 well: it’s a burly bike that you can still flick around reasonably. On climbs, the 9.7’s lighter weight and identical power system mean it’s one of the best in class – you get full Boost and eMTB modes to flatten hills, and the bike’s balanced geometry keeps the front planted without excessive rider effort theloamwolf.com. In summary, the Rail+ 9.7 is a great all-rounder: lightweight enough for all-day adventures, sturdy enough for enduro abuse, and carrying the same proven motor/battery tech as the flagship.

Trek Rail+ 9.8 Gen 5 – High-End Options (GX AXS or XT Build)

The Rail+ 9.8 Gen 5 hits the sweet spot of the lineup for many hardcore riders. It’s a true high-end build, offering most of the bells and whistles of the top model, but at a price somewhat below the flagship. Trek actually offers two spec variants under the “9.8” designation for Gen 5: one with Shimano XT and one with SRAM GX AXS Transmission – both around the $9,999–$10,999 USD range (the GX AXS version saw a price hike to ~$10,999 during 2025) theloamwolf.com. Both versions share the carbon frame and key hardware; the differences are in drivetrain, brakes, and suspension brand preference. Let’s break it down:

• Frame & Weight: Same OCLV carbon frame as the 9.7/9.9. Complete bike weight for the GX AXS build was measured at 24.1 kg (Large) with pedals theloamwolf.com, so expect ~23.5 kg for a Medium. The frame is finished in premium colors like “Deep Smoke” or “Pennyflake” metallic orange 99spokes.com – the latter is flashy and was even used on a limited “Smart x Trek” collab edition of the Rail 9.9 (more on that later).
• Suspension: The 9.8 series introduces Fox suspension into the Rail+. On the Rail+ 9.8 XT build, you get a Fox Performance Elite 38 fork (160 mm) and Fox Performance Elite Float X shock mtbmonster.com 99spokes.com. Performance Elite is essentially Fox’s top Factory-level damping without the Kashima coat – extremely capable stuff. On the Rail+ 9.8 GX AXS build that The Loam Wolf tested, the spec was the same Fox 38 and Float X setup theloamwolf.com. This means big-hit performance is excellent – the Fox 38 with GRIP2-derived damper offers high and low speed compression adjustment for tuning, and the Float X shock provides a good balance of support and suppleness. Testers described the Rail+ suspension as “beautifully balanced… plush & poppy” flowmountainbike.com, and the Fox kit no doubt contributes to that feel. (It’s worth noting Trek foregoed their prior use of proprietary RE:aktiv or Thru Shaft shocks – the Float X is a standard unit, easier to service or swap if desired ebike-mtb.com.)
• Drivetrain: Two choices:
  • Rail+ 9.8 XT Gen 5: 12-speed Shimano XT drivetrain (likely full M8100 series) with a 10-51T cassette 99spokes.com. This is a top-tier mechanical setup – smooth shifting, proven durability. Many riders trust XT for hard enduro use.
  • Rail+ 9.8 GX AXS Gen 5: SRAM’s latest GX Eagle AXS T-Type Transmission 12-speed (wireless electronic shifting) mtbmonster.com. This features the SRAM GX AXS derailleur with the new hanger-less interface (Trek’s frame has the Universal Derailleur Hanger mount which is compatible) and the GX 10-52T cassette. The shifting is near-instant and self-adjusting. Reviewers of our test bike loved the convenience – one even noted Trek cleverly powers the AXS derailleur from the main bike battery on the Rail+ 9.8, so there’s no separate derailleur battery to charge ebike-mtb.com ebike-mtb.com. This integration is a unique touch that means as long as your bike has juice, so does your shifting!
• Brakes: The brake spec coincides with the drivetrain choice:
  • The Shimano XT build likely comes with Shimano XT 4-piston brakes (or possibly SRAM Code RSC – but Trek usually pairs Shimano with Shimano). If XT brakes, they’d have 203 mm rotors, high power and easy servicing.
  • The GX AXS build, per our sources, uses SRAM Code Bronze brakes with 200 mm HS2 rotors 99spokes.com. Code Bronze is an OEM spec similar to Code R – 4-piston, lots of power. The large rotors (200 mm front & rear, possibly 220 mm front) keep braking consistent on long descents ebike-mtb.com. While these aren’t the absolute top-tier (Code RSC or Code Ultimate), they performed well in testing – only nitpick being a bit of extra lever throw due to the OEM spec, which some riders might adjust or upgrade later.
• Wheels: The Rail+ 9.8 sticks with Bontrager Line Comp 30 alloy wheels on both builds 99spokes.com. This may surprise some at the price point, but it’s likely to keep cost just shy of five figures. The good news: those wheels are tough and have the 108-point engagement hubs as mentioned. Additionally, going alloy here might be a wise durability choice for an e-bike, as carbon wheels (like on the 9.9) while lighter, can be pricey to repair if smashed. Of course, one could upgrade wheels aftermarket. The stock tires remain Bontrager XR Enduro (Bonaventure or Brevard model) 29×2.5/27.5×2.5 – decent volume and fast-rolling, but again, serious riders often swap to Maxxis Minion or similar for better soft-condition grip (the consensus was the stock tires’ compound is harder and slides sooner on wet/loose surfaces ebike-mtb.com).

Ride & Reviews: The Rail+ 9.8 Gen 5 has been extensively tested by reviewers, and it’s earned high praise. Flow Mountain Bike tested a Rail+ 9.8 and highlighted positives like “excellent handling… beautifully balanced suspension… smooth & intuitive Bosch motor… huge capacity from the 800 Wh battery,” even remarking that it’s “priced well amongst the competition.” flowmountainbike.com They did note a few negatives: the fixed chainstay length (445 mm on all sizes) isn’t adjustable and there’s a big size gap between M and L frames (reach jumps from 450 mm to 490 mm with no ML) flowmountainbike.com. This sizing quirk was echoed by others – if you’re ~5’10”–5’11” (180 cm), you might feel caught between M and L. Still, testers like Dan from Flow found the Large manageable and enjoyed the bike’s fit for stability flowmountainbike.com.

The Loam Wolf, in their 2025 eMTB shootout, rode the Rail+ 9.8 GX AXS and came away impressed. They praise the Rail+ as “versatile and balanced” on descents, with intuitive handling that instills confidence theloamwolf.com. The slightly steeper head angle (65° vs some competitors at 64° or slacker) actually helped front wheel grip and precision, making it “great in tight switchbacks and technical wiggles” uphill and giving “stellar front wheel control” on the way down theloamwolf.com theloamwolf.com. One memorable quote: “Trek has produced an effective climbing machine in the Rail+. …tight switchbacks… were made easy, as long as the pedals were kept safe [from strikes].” theloamwolf.com On the motor, Loam Wolf’s crew, like many, lauded the Bosch Gen 5’s refinement – stating the eMTB mode offers “exceptional traction and intuitive power,” and the upgraded 800 Wh battery delivered excellent range (some even called it class-leading) theloamwolf.com theloamwolf.com. They did experiment with Bosch’s upcoming high-power mode and cautioned it can be too much on technical climbs, but with the standard modes, the control is superb theloamwolf.com. The only downsides The Loam Wolf noted were that, when really pushed at race-pace, the Rail+’s suspension felt a bit plush/sluggish – “not the sharpest handling… more on the comfortable end of the spectrum” compared to the previous gen which was firmer theloamwolf.com. This comfort can be a plus for most riders, but racers might desire a firmer setup. Additionally, they echoed that at extreme speeds in really gnarly terrain, the Rail+ (with its normal pivot, non-high-pivot design) doesn’t give the “point and shoot” stability of some competitors – but it’s a trade-off for the Rail’s more playful nature ebike-mtb.com.

In summary, the Trek Rail+ 9.8 Gen 5 is a workhorse e-enduro with top-level performance. It gives you nearly everything the flagship offers: elite suspension, either top Shimano or cutting-edge SRAM wireless shifting, and the full powertrain. It’s arguably the smart buy if you want a no-compromise bike but don’t need the vanity of the absolute highest-end drivetrain or carbon wheels. Many riders will find the 9.8 hits the value sweet spot in Trek’s lineup.

(One more thing: Trek’s Project One customization program may offer the Rail+ 9.8 in the future, which could allow mix-and-match of parts or unique paint. Currently, the Rail+ is not yet listed on Project One, but Trek has teased expanding e-MTB offerings in custom programs.)

Trek Rail+ 9.9 Gen 5 – Flagship Technology and Components

At the top of the range sits the Rail+ 9.9 Gen 5, Trek’s flagship e-MTB. With an MSRP around $11,499 USD (for the standard spec) trekbikes.com, the Rail+ 9.9 pulls out all the stops in components. It’s aimed at the rider who demands the best or perhaps the no-compromise racer. Trek actually has a couple of sub-variants here as well, often denoted by the drivetrain: for example, Rail+ 9.9 X0 AXS T-Type (the primary spec in North America) and a Rail+ 9.9 XX AXS T-Type limited edition in some markets. Both are built on the same platform, so we’ll describe them together and note differences.

What distinguishes the Rail+ 9.9 Gen 5:

• Ultimate Suspension: The 9.9 is equipped with top-tier suspension bits. In contrast to the Fox-equipped 9.8, Trek typically outfits the 9.9 with RockShox’s flagship suspension: a RockShox ZEB Ultimate fork (160 mm) and RockShox Super Deluxe Ultimate rear shock 99spokes.com 99spokes.com. The ZEB Ultimate features the latest Charger 3 RC2 damper (with independent high/low speed compression adjust), and the Super Deluxe Ultimate shock has the RC2T damper – both representing RockShox’s most adjustable, high-performance units. In a recent spec listing, a Rail+ 9.9 was shown with a coil shock option as well (since the frame’s progression flip-chip allows for coils) flowmountainbike.com, but it appears stock is an air shock. Either way, this suspension is race-ready and capable of heavy abuse without fading. E-MOUNTAINBIKE Magazine noted that with the right suspension tuning (and possibly a tire swap), the Rail+ 9.9 “could narrow the gap to the sportier Trek Slash+ and potentially vie for the top spot in Trek’s lineup” ebike-mtb.com – indicating that the platform has the bones to handle very aggressive riding when fully kitted out.
• Drivetrain: The standard Rail+ 9.9 comes with SRAM X0 Eagle AXS Transmission (wireless 12-speed) trekbikes.com 99spokes.com. X0 is SRAM’s high-end enduro/gravity-level group – just a step below the ultra-expensive XX, but functionally very similar (slightly heavier). It has the robust T-Type AXS derailleur, X0 cassette (10-52T), and X0 carbon crankset in 160 mm length. The shifting is crisp and precise, even under load. In some regions or limited runs, Trek offered a Rail+ 9.9 XX AXS which upgrades to the SRAM XX Transmission (lighter cassette, crank, and the highest grade materials). That version also might include other upgrades like Bontrager carbon wheel upgrades or handlebars, depending on market. For instance, a European spec Rail+ 9.9 XX AXS was listed at €12,999 and likely had all the fruit 99spokes.com. However, the performance difference between X0 and XX is minor – mainly weight. Both are top-of-the-line wireless drivetrains befitting a flagship.
• Brakes: The 9.9 gets the best brakes in the Rail lineup. SRAM Code Silver or Ultimate brakes are spec’d (4-piston calipers). The comparison data shows the 9.9 having SRAM Code Silver with 200 mm/220 mm HS2 rotors 99spokes.com, which likely corresponds to Code RSC brakes (since Silver is often an alias for RSC). These offer tool-free reach and contact point adjustment and are a benchmark for DH/enduro braking. Stopping power is plentiful – one tester noted you can “throw the anchor and come to a safe stop” even if you mess up a line, thanks to the 220 mm rotor and powerful calipers ebike-mtb.com. In short, you get maximum braking confidence.
• Wheels: The Rail+ 9.9 finally steps up to carbon wheels. Trek equips it with the Bontrager Line Pro 30 wheelset (OCLV carbon rims, 29/27.5, 108T hubs) 99spokes.com. These wheels drop some weight and add stiffness, which can improve responsiveness. They come with a SRAM XD driver on the rear hub to accommodate the Transmission cassette 99spokes.com. The tires are the same Bontrager Enduro 2.5″, but Trek may spec slightly stickier versions on the 9.9 (in one spec sheet they list “Bonaventure RSL SE” tires – possibly a softer compound variant) 99spokes.com. Still, many users will swap to their favorite rubber. The tubeless setup is standard.
• Finish & Extras: Being the flagship, the Rail+ 9.9 often gets special paint or collab editions. For example, a limited “Smart x Trek Rail+ 9.9 Gen 5” was unveiled at the 2023 Milan Design Week in partnership with the Smart automobile brand (makers of the Smart #5 Brabus EV). This limited model featured a unique Atom Grey Matte paint with BRABUS red accents and was touted as “the highest tier of Trek’s e-MTB lineup, emphasizing attention to detail and a unique aesthetic.” media.smart.com barchart.com Functionally it’s the same bike, but it shows Trek’s willingness to do premium collaborations on the 9.9. Back to the standard 9.9 – it also comes with nice touches like wireless RockShox Reverb AXS dropper post (in size-specific travel, e.g. up to 170 mm or 200 mm in larger sizes) 99spokes.com, a carbon Bontrager Line Pro handlebar, and Bluetooth/ANT+ integration for accessories. If desired, you can also add the Bosch Kiox 300/500 display to the system (the top-tube controller has a plug for it) ebike-mtb.com, but Trek leaves it optional to keep the cockpit clean.

On Trail: The Rail+ 9.9 is a monster on the trails. With the finest components, it’s fully ready for tough enduro stages or bike park laps. Riders who’ve thrown a leg over it describe it as “a true terrain gobbler… ready to take on the gnarliest trails” fabrykarowerow.com. The combination of the plush 160 mm suspension and the heavy (but quiet) Bosch assist can make technical descents feel easier – the bike just bulldozes through chunk, yet with the flip-chip in the progressive setting, it still has support for jumps and hard hits flowmountainbike.com. E-MOUNTAINBIKE mag’s test of a high-spec Rail+ concluded that it’s not been “downgraded to a touring bike” by any means – “it holds its own on flowing home trails and in technical alpine terrain” ebike-mtb.com. Only when comparing it back-to-back with a more downhill-focused e-bike (like Trek’s own Slash+ or a Specialized Kenevo) did they find the Rail+ slightly less at home at the absolute limit ebike-mtb.com. But the flip side is the Rail+ is much more versatile – it climbs and covers distance far better than those gravity-oriented e-MTBs. In fact, the 9.9’s lighter weight and stiffer carbon wheels will make it one of the more sprightly full-power e-bikes in its class on uphills and traverses.

Is the Rail+ 9.9 worth the price? If you demand the very best and want a race-ready machine out of the box, it certainly delivers. However, from a value perspective, the 9.8 or 9.7 can be 90% as good for thousands less. Trek likely sells the 9.9 to those who love top-end tech (wireless everything, carbon everything). And for that crowd, the 9.9 doesn’t disappoint – it’s an elegant weapon in the e-MTB arsenal. Plus, you get bragging rights of owning the flagship. As one press release put it, the Rail+ 9.9 Gen 5 is “Trek’s solution for riders who want all the power, range, and versatility… in the most premium package” vitalmtb.com.

What’s Next? – Future Trek Rail Models (Gen 6? 2025+ Updates)

The Rail+ Gen 5 series is brand new for model year 2025, having been introduced in early 2025 vitalmtb.com. Given Trek’s product cycle, the Gen 5 will likely be the current platform for a few years. There is no official word of a “Gen 6” Rail yet – and since Gen 5 just launched, we wouldn’t expect a Gen 6 until perhaps 2027 or later. That said, Trek is actively expanding their e-MTB lineup in other ways. In 2024–2025 they launched the Slash+, a light-assist 170 mm e-enduro with a TQ motor (more of a “emtb lite” category), and the new Powerfly+ series for trail riding trekbikes.com emtbforums.com. This means Trek now covers a broad e-MTB spectrum: Rail+ for full-power enduro, Slash+ for gravity-focused minimal assist, and Powerfly+ for moderate trail use.

For the Rail+ line specifically, we could see additional variants or running updates:

• Trek might introduce a Rail+ 7 Gen 5 or other intermediate models in the future. (Notably, there was a gap between the Rail+ 8 and 9.7 – possibly a Rail+ 7 could slot in with say an alloy frame but slightly higher spec than the 8, or a carbon frame with slightly downgraded parts. As of now, no Rail+ 7 Gen 5 is listed, but Trek has flexibility to add one if market demands.)
• New colorways or limited editions are likely for 2026. Trek often refreshes paint schemes annually. We’ve already seen the limited Smart collab on the 9.9 media.smart.com, and other partnerships (e.g. with athletes or motorsports brands) could emerge. Keep an eye out for “Signature Edition” Rails.
• Bosch Software Updates: One of the most exciting near-term updates isn’t hardware at all, but software. Bosch’s Performance Line CX is evolving with firmware – for example, Bosch released a “Race” mode and an Enhanced eMTB mode that can increase peak torque to ~90–100 Nm on certain motors theloamwolf.com. While in beta, testers found the eMTB + mode a bit wild, Bosch is expected to fine-tune it and release it via the Flow app. This means current Rail+ Gen 5 owners could see a free performance boost and new features (like more customization of assist dynamics) with over-the-air updates theloamwolf.com. Trek’s partnership with Bosch suggests they’ll support and promote these updates heavily.
• Gen 6 rumors: If we speculate on a far-future Rail Gen 6, possible trends could be: integration of even larger batteries (Bosch showed a 750 Wh, now 800 Wh – a 900+ Wh might be next, though weight is a concern), perhaps a move to even quieter motors or new gearboxes, maybe frame geometry tweaks following industry trends (if high-pivot suspension continues to dominate, Trek might explore a high-pivot Rail in the future to improve descending traction, as they did with Slash+). For now, Gen 5 is state-of-the-art, and Trek explicitly balanced its geometry to be somewhat conservative for versatility theloamwolf.com. Any Gen 6 could potentially introduce a more extreme version if the market shifts that way.

Lastly, Trek’s competitors are not sitting still, which leads us to the final section – how the Rail+ Gen 5 compares to other top e-MTBs, and what that means for future updates.

Rail+ Gen 5 vs. Other Premium e-MTB Competitors

The Trek Rail+ Gen 5 enters a stacked field of high-end e-MTBs, each vying for the “ultimate e-enduro” title. How does the new Rail+ compare? Let’s look at a few key competitors and categories:

• Specialized Turbo Levo (Gen 3/4): The Specialized Levo is often seen as the Rail’s archrival. Specialized’s latest Turbo Levo (2022–2024, sometimes dubbed Gen 3, and a Gen 4 Levo was just introduced in 2024/25) is a 150/160 mm mullet e-MTB that, like the Rail+, features adjustable geometry and comes in various builds from Comp to S-Works. The Levo’s strengths include a smooth Brose motor (branded Specialized 2.2) with slightly higher torque (~90–101 Nm in the newest model) 99spokes.com, and a highly tunable MasterMind TCU display that lets riders micro-adjust power levels. Specialized’s new Levo Comp sports a 700 Wh (now 樞 840 Wh) battery – the latest Levo introduced an optional 160 Wh range extender that brings total capacity to ~840 Wh 99spokes.com. Trek one-ups that with 800 Wh internal + 250 Wh extender = 1050 Wh max, albeit with an external pack. Weight-wise, a carbon Levo is similar to the Rail: ~23–24 kg. One difference: Specialized pioneered SWAT in-frame storage (the Levo’s down tube has a glovebox for tools/tube). Trek doesn’t have storage due to the battery occupying the tube. In terms of ride, the Levo has a very neutral, sorted suspension and a lower axle weight distribution (it’s praised for feeling agile). But many testers still give Bosch’s motor a slight edge for responsiveness and prefer Trek’s bigger battery for range. Price: Specialized is typically pricier – the S-Works Levo runs $15k+ (with carbon wheels), whereas Trek’s top Rail+ is ~$12k trekbikes.com. Vital MTB’s round-up phrased it well: “The Rail returns with a bigger battery, more travel, new geometry… and Bosch’s latest motor,” effectively leapfrogging the Levo’s older tech in those areas vitalmtb.com. In a direct comparison, a 2026 Levo Comp vs 2025 Rail+ 9.7 showed the Levo had a bit more motor torque and battery (101 Nm, 840 Wh), while the Rail had slightly less weight and higher spec for the price 99spokes.com 99spokes.com. It’s a close battle – one might choose Trek for the Bosch system and value, or Specialized for its polish and brand ecosystem (Specialized offers their Mission Control app, etc.). Both climb extremely well and descend capably; the Rail+ might feel a tad more plush and stable, and the Levo a tad more lively and sharp – according to reviewers who have ridden both.
• Orbea Wild (2023-) and Bosch-equipped rivals: Orbea’s Wild FS was overhauled in 2023 with a carbon frame, 160 mm travel, and Bosch Smart System (the previous gen used older Bosch). It’s a 29er front and rear (no mullet) and won accolades including a World E-Bike Championship under Florian Nicolai. The Wild offers battery options – 625 Wh for weight weenies or 750 Wh for max range, whereas Trek gives 800 Wh standard trekbikes.com trekbikes.com. The Wild’s geometry is a bit slacker (64° head angle) and longer. In reviews, the Orbea Wild is often praised for its cornering and support, but it had some frame cracking issues early on that Orbea addressed. The Trek Rail+ with its 800 Wh and refined frame likely has an edge in battery tech and perhaps frame durability (Trek tests rigorously, and the alloy rear triangle on the Rail might be more robust). Another Bosch bike is the Scott Ransom eRide (or the newer Scott Patron eRide) – 160–170 mm bikes. The Patron cleverly integrated the shock into the frame and also uses Bosch. It has a 750 Wh battery and very sleek looks, but at the cost of complexity. Trek kept things more conventional for ease of maintenance (external shock, bottom-load battery). If comparing, the Rail+ Gen 5’s Bosch Performance CX Gen 5 motor is the same core unit in these bikes, but Trek’s integration (like the side removal vs bottom, etc.) differs. Trek’s RIB 2.0 is now on par with Orbea’s and Scott’s bottom-access batteries in terms of ease.
• Santa Cruz Bullit / Yeti 160E / Canyon Spectral:ON: These represent some other premium e-enduro options. The Santa Cruz Bullit MX has 170 mm travel, mixed wheels, and the Shimano EP8 motor (85 Nm). Its battery is 630 Wh (or 720 Wh on the latest Carbon CC models). The Bullit is famed for its downhill prowess (slack and long), but it can’t match the Rail’s range or the Bosch’s fine-tuned motor behavior (EP8 is powerful but some find it less refined at low cadence). Yeti’s 160E is another EP8-powered 160 mm 29er; it’s very expensive (up to $13k) and was the first to have a six-bar linkage designed for e-bike forces. It rides amazingly well by accounts, but again battery is 630 Wh – an endurance limitation compared to Trek’s 800 Wh. Canyon’s Spectral:ON is unique: it went with a 900 Wh battery (on CF8/9 models) and a Shimano motor, and kept weight impressively low with carbon frame and wheels. The Spectral:ON is an absolute range champ with that battery, beating even the Rail+ in capacity (900 vs 800 Wh, though without extender capability). However, the Spectral:ON mullet uses a smaller 27.5″ rear tire (2.4″) to fit that battery, and its geometry is a bit less aggressive. Price-wise, the Canyon is direct-to-consumer and often undercuts Trek. But with Trek you get dealership support, lifetime warranty, etc., which many riders value for an e-bike.
• Value Competitors (Commencal, Giant, etc.): In the “premium” segment, we should also acknowledge brands like Giant Reign E+ (new 2022–23 model with 170 mm travel, mullet, Yamaha 85 Nm motor, 750 Wh – a solid competitor, often a bit cheaper than Trek), the Commencal Meta Power SX (mixed wheels, high power Shimano motor, aluminum frame, bomber build at a good price), or Norco Sight VLT (customizable 900 Wh battery option). The Trek Rail+ Gen 5 holds up strongly – its tech is cutting-edge, and Trek’s broad size range (S to XL) and adjustability give it an edge in versatility. Some competitors offer less size range (e.g. Yeti has only M–XL, no S). Trek also integrated things like AXS derailleur powered by main battery which is a small but sweet innovation competitors haven’t done ebike-mtb.com.

In general, the Rail+ Gen 5 compares very favorably. It doesn’t dominate every metric (the Spectral:ON can outrange it with 900 Wh, the Kenevo SL is half the weight but different category, the Levo has its micro-tune display, etc.), but Trek found a well-balanced formula. Vital MTB’s first look noted that Trek delivered “a lighter, quieter motor, a massive battery, and the latest frame tech” in the Rail+ Gen 5 vitalmtb.com – essentially checking all the boxes enthusiasts were asking for. Many of the Rail’s competitors still use the previous gen Bosch or smaller batteries or haven’t updated geometry in a while. The Rail+ being new means it has the latest Bosch motor (few 2023 bikes had the Gen 5 since Trek got an early exclusive), and its 160/160 mm travel and mullet wheels are very on-trend for enduro e-bikes.

One area of emerging competition: lightweight e-MTBs. While not direct competitors in power, bikes like the Specialized Turbo Levo SL, Orbea Rise, Transition Relay, etc., cater to riders who want a more nimble feel. Trek’s response so far is the Slash+ (light-assist, 50 Nm TQ motor). But if a rider is cross-shopping, they should note the Rail+ Gen 5 is a full-power bruiser – around 24 kg and 85 Nm, it’s built for those who prioritize shuttle-like assists and long range. A 18 kg Levo SL is a different ride experience. Both have their place in the market.

In conclusion, the Trek Rail+ Gen 5 series firmly places Trek among the top tier of e-MTB offerings. It successfully brings together a huge battery, smart integration, refined suspension, and adjustability in a package that reviewers say is “better in every way” than before flowmountainbike.com. It stands toe-to-toe with Specialized’s best, while outlasting many rivals in battery life and matching others in motor tech. With the Rail+ Gen 5, Trek has not only caught up to the competition, but in some areas, it’s leapt ahead – all while keeping prices in line with (or slightly below) the premium e-MTB norm. If you’re shopping in this category, the Rail+ Gen 5 absolutely deserves a spot on your shortlist, offering a potent mix of power, range, and ride quality that’s hard to beat in 2025.

Sources:

• Official Trek Bikes product information and press releases trekbikes.com vitalmtb.com vitalmtb.com trekbikes.com
• Detailed reviews from Flow Mountain Bike, The Loam Wolf, E-MOUNTAINBIKE Magazine flowmountainbike.com theloamwolf.com ebike-mtb.com
• Comparative specs via 99Spokes and other data aggregators 99spokes.com 99spokes.com
• Community and expert discussions on e-MTB forums and media ebike-mtb.com theloamwolf.com