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  • Rail 9.9 XX1 AXS Gen 3
  • Rail 9.9 XX1 AXS Gen 3
Overview

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 new smart system Performance Line CX with a new Bluetooth® LED remote for easy connectivity and all-in-one navigation and activity tracking through the eBike Flow app, plus TyreWiz and 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, TyreWiz and AirWiz pressure monitoring, plus Bosch's latest tech with smart system.

The Walkthrough

favorite_borderWhy you'll love it

  1. Bosch's new smart system gives you all the same power and responsiveness with a new Bluetooth-connected LED remote and eBike Flow app that puts even more control and customization at your fingertips
  2. 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
  3. RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
  4. 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 eMTB-optimized forks for less flex and more precise steering
  5. Trek's Removable Integrated Battery (RIB) system looks great and is super user-friendly: it fully hides the battery in the frame for protection, makes it easy remove the battery without tools and lets you mount a water bottle cage
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"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
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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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More options

NEW 2023

Rail 9.9 XX1 AXS Gen 4

$13,799.99 - $13,999.99 

NEW 2023

Rail 9.9 CX Race Gen 4

$13,299.99 - $13,499.99 

NEW 2023

Rail 9.9 XTR Gen 4

$12,549.99 - $12,749.99 

NEW 2023

Rail 9.8 GX AXS Gen 4

$10,299.99 - $10,499.99 

NEW 2023

Rail 9.8 XT Gen 4

$8,999.99 - $9,199.99 

NEW 2023

Rail 9.7 Gen 4

$7,549.99 - $7,749.99 

NEW 2023

Rail 7 Gen 3

$6,649.99 

NEW 2023

Rail 5 Gen 3

$5,649.99 

SALE 2023

Rail 9.9 XTR Gen 3

$12,249.99  | $12,549.99 

SALE 2023

Rail 9.8 GX AXS Gen 3

$9,999.99  | $10,299.99 

SALE 2023

Rail 9.8 XT Gen 3

$8,699.99  | $9,199.99 

SALE 2023

Rail 9.8 GX Gen 3

$8,699.99  | $9,199.99 

SALE 2023

Rail 9.7 Gen 2

$7,049.99  | $7,549.99 

SALE 2023

Rail 7 Gen 2

$5,999.99  | $6,649.99 

SALE 2023

Rail 5 Gen 2

$4,999.99  | $5,649.99 

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.

Learn more

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.

Read more

How to pack for any trail ride

Everything you need (and nothing you don’t).

Learn how

How to responsibly recycle your e-bike battery

Learn more

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 video

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SALE

Bontrager Blaze WaveCel Mountain Bike Helmet

$149.99 - $199.99  | $299.99 

Crankbrothers Mallet E Pedal Set

$179.99 

Garmin Forerunner 745 Smartwatch

$375.00 

NEW

100% Hypercraft HiPER Lens Sunglasses

$185.00 

SALE

Bontrager BITS Integrated MTB Tool

$49.99  | $94.99 

SALE

Bontrager Dual Charger Floor Pump

$55.99  | $74.99 

Bontrager Rapid Pack Hydro

$99.99 

SALE

Bontrager Quantum Full Finger Cycling Glove

$23.99  | $36.99 

SALE

Bontrager Line Pro MTB Pedal Set

$77.99  | $104.99 

Bontrager Cambion Mountain Bike Shoe

$224.99 

SALE

Bontrager Flatline Mountain Bike Shoe

$89.99  | $139.99 

Features

Bosch smart system

The new Bosch smart system gives you an eMTB that's more connected than ever. The new LED remote connects with the new Bosch eBike Flow app via Bluetooth. You get tons of useful features at your fingers, and over-the-air system upgrades.

Read more

Bosch eBike Flow app

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.

Read more

Removable Integrated Battery

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.

Watch video

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.

RockShox Super Deluxe with Thru Shaft

With the all-new RockShox Super Deluxe Ultimate Thru Shaft, you get the most refined shock on the market, with an updated air spring and an exclusive Thru Shaft damper that gives you tenacious grip, plush control, and the support you need for ripping rough descents all day.

Learn more

What is the range?

To see how far you can ride your electric mountain bike on a single charge, check out Bosch’s range calculator. We’ve auto-filled the variables for this bike model and the average rider, but you can make adjustments to get your most accurate estimate.

Calculate your range

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.

Learn more

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.

Learn more

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.

Learn more

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.

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.

Learn more

Knock Block

Knock Block has your frame's back when things go wrong. It prevents your handlebars from spinning all the way around in a crash, so your hoses won't get yanked, and your controls won't hit the top tube.

Learn more

ABP

Our patented Active Braking Pivot allows your suspension to work freely whether you’re on the brakes or off. It’s smooth, controlled suspension that’s at its best all the time.

Learn more

Bosch Kiox 300 display

The Bosch Kiox 300 is tough, compact, and easy to read with a full-color display. Keep ride data right where you can see it including rider power, motor output, speed, remaining range, and more!

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.

Bosch PowerTube 750

Bosch's biggest battery for your biggest rides. PowerTube 750 delivers 20% more range and a long service life.

Easier internal routing

Integrated channels in the frame make it super easy to route cable housing and brake hose so you get a clean set-up with no hassle.

Watch video

Specs Sizing
Geometry Service Reviews
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