Free shipping and professional assembly
Order your bike online and we’ll ship it to the Trek shop of your choice to be professionally assembled. All you have to do is pick it up!
It's right for you if...
You want to spare no expense on your e-MTB experience. You want the most adjustability, smoothest performance, longest range, and most high-tech electric assist you can get. You love customization and want all the cool features of the Bosch smart system, and you want wireless electronic shifting.
The tech you get
An upgraded OCLV Mountain Carbon frame with longer reach and oversized head tube and seat tube for maximum strength. An extra-long-range 750Wh battery, ultra-adjustable RockShox ZEB Ultimate fork, RockShox Super Deluxe Ultimate Thru Shaft shock, and SRAM XX1 AXS drivetrain. You get Bosch's smart system Performance Line CX with a new Mini Remote and Bluetooth® System Controller display that's integrated into the top tube, plus AirWiz pressure monitoring.
The final word
Rail 9.9 is all about top-shelf tech. RockShox's best enduro fork, Bosch's biggest battery, the smooth shifting of XX1 AXS, an updated frame, and AirWiz pressure monitoring, plus Bosch's latest tech with smart system.
favorite_borderWhy you'll love it
- The new System Controller shows your currently-selected assist level and remaining battery level. Its neatly integrated into the top tube for maximum protection and a sleek look.
- Bosch's new smart system gives you all the same power and responsiveness with a new discrete Mini Remote that's streamlined with just the controls you need at your fingertips to toggle through assist levels or change to walk mode
- TyreWiz and AirWiz let you confirm your tires, fork, and shock are at the right pressure at a glance. No more getting the pump or gauge out just to check
- Intelligent eMTB and eMTB Lite modes automatically adjust the assist based on your input to give you just the right amount of power for your ride
- The new frame is extra stout with a 34.9mm seat tube to accommodate more robust dropper posts, and an oversized head tube that works with burly e-MTB-optimized forks for less flex and more precise steering
"I like it so much that I bought one"
Watch Rob Rides EMTB put the new Rail with smart system through its paces both on and off the trail, and find out why he liked it so much that he had to have one!
Watch the video
"One of the best"
"Indeed the way it manages to balance big-hit compliance while still giving good pop is mighty impressive. Along with its stout chassis, long wheelbase and burly build kit, the Rail is capable of monster trucking its way down some pretty gnarly descents [...] the Bosch Performance CX Line motor is another key component to the Trek Rail’s all-round performance. In our experience, this is the best full-powered motor out there."
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"Trek has really gone all out with this bike"
"My first thought about the Rail 9.9 is how it resembles a new school American muscle car, with a ton of carbon fiber and lots of digitally integrated sensors, and as always, more power than its predecessor [...] If there was ever a bike that was ready for anything, the new generation of the Trek Rail 9.9 would be it."
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Best in Class winner!
It was a close competition, but not much could match the Rail on every type of terrain. The Bosch system will get you up any trail and the geometry is as close to perfect as we have found for all-around riding.
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"Our e-bike of the Year"
"Rail dominates the descents and flattens the climbs…it’s every bit as potent as the Slash, but with its own built-in uplift."
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"Sets the bar"
"Whether flowing or technical, it literally glides by the competition like it's on rails while also offering plenty of comfort for long days in the saddle."
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"E-MTB dominance"
"One of the best all-rounders in the test. This tuxedo-looking bike symbolizes class and intention with a big win on battery life."
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Which generation is right for you?
Go Rail Gen 4 for minimalist smart system compatibility, Gen 3 for smart system with visible control at the bars, or Gen 2 for a legacy Bosch system that saves your wallet.
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Get faster on the trail in a week
When it comes to being a better trail rider, practice makes perfect. Get seven tips from Pinkbike’s Christina Chappetta that will have you setting PR's and riding with more confidence in no time.
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Minimum days, maximum fun
With just one week to road trip through British Columbia, two Trek big mountain riders decided to think outside the box.
Watch the videoYou might also like
RIB is a one-piece battery and cover with a built-in handle that can easily be removed and re-installed in the frame with no tools and no hassle. It’s the most convenient way to remove your battery for transport, security, or just easier charging.
Bosch Performance Line CX motor
Bosch Performance Line CX sets the standard for eMTB performance with up to 85Nm of torque and an intelligent eMTB mode with Extended Boost that automatically adjusts the amount of assist based on the terrain.
The compact, ergonomic Mini Remote lets you easily change assist level, activate Walk mode, or turn on optional lights, all without moving your hand off the handlebar. Plus, it's wireless and connects with your System Controller via Bluetooth
The System Controller gives you a quick overview of your assist mode and battery level without distracting you from the ride. It's integrated into the top tube so it's out of the way but still easy to see with LED indicators. It also connects to the eBike Flow app via Bluetooth for accessing ride stats and performing system updates.
RockShox AirWiz and Quarq TireWiz
TyreWiz monitors your tire pressure while AirWiz monitors your fork and shock pressure. Set your desired pressure in the SRAM AXS app and then just check the lights before each ride—red means you need a pump, green means go ride.
The new eBike Flow app turns your ride into a personalized experience. Use it to customize your motor's assist behavior, track your ride stats, and integrate your data with apps like Strava and Apple Health. There's even handy features like navigation and service reminders.
Suspension Calculator
This suspension calculator will help you optimize your suspension settings for your riding weight. Simply follow the steps to find your best set up.
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Complete Tubeless System
Tubeless Ready rims and tires make it easy to ditch the tubes so you get better traction, fewer flats, and less weight. You're ready to roll right out of the box with the included TLR rim strips, valves, and sealant.
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Carbon Care Wheel Loyalty Program
Every set of Bontrager carbon wheels is backed by the Carbon Care Wheel Loyalty Program. In the unlikely event that you damage your Bontrager carbon wheels within the first two years of ownership, we’ll repair or replace them for free.
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Bosch PowerTube 750
Bosch's biggest battery for your biggest rides. PowerTube 750 delivers 20% more range and a long service life.
Integrated speed sensor
You've got one less detail to sweat with the integrated speed sensor. The chainstay-mounted sensor stays protected while the custom hub-mounted magnet stays secure—no more error codes from mis-aligned sensors.
SRAM Eagle AXS drivetrain
Enjoy precise, lightning fast gear changes—even when shifting under load—with Eagle AXS wireless electronic drivetrains. They're water- and dust-proof, and the AXS App makes it easy to personalize your settings.
Oversized 34.9mm dropper post
Bigger is better. The oversized seat tube diameter gives more support and strength for longer travel droppers, and allows for more robust, durable internals that work faster.
Mino Link adjustable geometry
Fine tune head tube angle by 1/2° and BB height by up to 10mm with the simple turn of a nut. Just flip the link to choose between slack or slacker geometry, without negatively affecting suspension performance. A Trek exclusive.
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| Frame | OCLV Mountain Carbon main frame, 1.8'' lower head tube, Bosch System Controller compatible, Removable Integrated Battery (RIB), Knock Block 2.0, guided internal routing, 34.9mm seat tube, magnesium rocker link, Motor Armor, Mino Link, ABP, Boost148, 12mm thru axle, 150mm travel |
|---|---|
| Fork | RockShox ZEB Ultimate, AirWiz, DebonAir spring, Charger 3 RC2 damper, 1.8'' oversized tapered steerer, eMTB optimized crown, 44mm offset, Boost110, 15mm Maxle Stealth, 160mm travel |
| Shock | RockShox Super Deluxe Ultimate RT, 230mm x 57.5mm |
| Max compatible fork travel | 170mm (580mm axle-to-crown) |
| Wheel front | Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle |
|---|---|
| Wheel rear | Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle |
| Skewer rear | Bontrager Switch thru axle, removable lever |
| *Tire |
Size:
S, M, L, XL Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50'' |
|
Size:
S, M, L, XL Bontrager SE6 Team Issue, Tubeless Ready, Core Strength sidewalls, aramid bead, 120 tpi, 29x2.50'' |
|
| *Tire part |
Size:
S, M, L, XL Bontrager TLR sealant, 6oz |
|
Size:
S, M, L, XL Quarq TyreWiz tire pressure monitors |
|
| Max tire size | Frame: 29x2.60" Fork: See manufacturer |
| Shifter | SRAM Eagle AXS, wireless, 12 speed |
|---|---|
| Rear derailleur | SRAM XX1 Eagle AXS |
| Crank arm | E*thirteen E*spec Race carbon, 34T, 165mm length |
| Chainring | SRAM X-SYNC 2, 34T, alloy |
| Cassette | SRAM Eagle XG-1299, 10-52, 12 speed |
| Chain | SRAM XX1 Eagle, 12 speed |
| Pedal | Wellgo VPE-536 |
| Max chainring size | 34T |
| Saddle | Bontrager Arvada, austenite rails, 138mm width |
|---|---|
| *Seatpost |
Size:
S RockShox Reverb AXS, 100mm travel, wireless, 34.9mm, 340mm length |
|
Size:
M RockShox Reverb AXS, 150mm travel, wireless, 34.9mm, 440mm length |
|
|
Size:
L, XL RockShox Reverb AXS, 170mm travel, wireless, 34.9mm, 480mm length |
|
| Handlebar | Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise, 780mm width |
| Grips | Bontrager XR Trail Elite, nylon lock-on |
| Stem | Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree, 45mm length |
| Brake | SRAM Code RSC 4-piston hydraulic disc |
| *Brake rotor |
Size:
S, M, L, XL SRAM 6-bolt, 200mm |
|
Size:
S, M, L, XL SRAM HS2, 6-bolt, 220mm |
|
| Rotor size | Max brake rotor sizes: Front see fork manufacturer, rear 200mm |
| *Battery |
Size:
S Bosch PowerTube 625Wh, smart system |
|---|---|
|
Size:
M, L, XL Bosch PowerTube 750Wh, smart system |
|
| Charger | Bosch standard 4A, 110V, smart system |
| *Controller |
Size:
S, M, L, XL Bosch System Controller BRC3100, smart system |
|
Size:
S, M, L, XL Bosch Mini Remote BRC3300, smart system, 22.2mm |
|
| Motor | Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm |
| Electronics | SRAM AXS aux power cable |
| Weight | M - 23.60 kg / 52.03 lbs |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |