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Trek Rail 9.9

Trek Rail 9.9
  • Color: Gloss Purple Phaze/Matte Raw Carbon
  • Color: Matte Raw Carbon/Gloss Trek Black
  • Color: Solid Charcoal to Root Beer Ano Decal
  • Color: Solid Charcoal/Radioactive Orange
  • Color: Matte Trek Black/Gloss Viper Red
$11,999.99 - $12,499.99
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Rail 9.9 is a long-travel electric mountain bike built for ultimate trail performance. The light OCLV Mountain Carbon frame features an awesome RockShox suspension setup, the latest wireless electronic drivetrain tech, and the best e-MTB drive system on the market. It'll shred right alongside the enduro crowd, but the best part is that you'll always beat them up the climbs and get in the most runs.

It's right for you if...
You’re looking for a seriously capable long-travel carbon e-MTB and you want nothing but the best. Your bike better have wireless electronic components, a high-end suspension setup, and a powerful Bosch system that’ll fly up grinders in a flash.

The tech you get
A light and durable OCLV Mountain Carbon main frame with carbon stays that fully encases a 625Wh battery for sleek looks and protection on the trail, a 160mm RockShox Lyrik Ultimate fork with Charger 2 RC2 damper, 150mm of rear travel with a RockShox Deluxe RT3 shock with Trek's RE:aktiv with Thru Shaft damper, a powerful new Bosch Performance Line CX 250W motor that assists up to 20 mph, and a Kiox controller. A 1x12 SRAM X01 Eagle AXS drivetrain, RockShox Reverb AXS dropper post, Shimano XT 4-piston brakes, a carbon handlebar, and Bontrager Line Carbon 30 29er wheels with Bontrager SE5 Team Issue tires.

The final word
Rail 9.9 is all about top performance tech. The latest wireless electronic components, RockShox's best enduro fork, Bosch's most powerful battery and full-color controller. Plus, the light OCLV Mountain carbon frame is trimmed with lots of carbon parts, including the wheels and crank.

Why you'll love it
- The new, better-than-ever Bosch motor is smaller, lighter, and more efficient. It feels more natural while you’re pedaling, and has less drag when you’re not.
- The full-color Kiox controller displays ride info, connects with your Bluetooth-enabled devices, and has a built-in theft prevention feature.
- RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control.
- 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.
- The SRAM X01 Eagle AXS drivetrain is smart, smooth, and completely wireless.

Electronic drivetrain systems deliver excellent shifting, easy set up, and solid battery life. Here are the highlights of today’s electronic shifting systems:

Shifting Performance
Electronic shifting systems use powerful servomotors to rapidly shift the chain. Because microprocessors and sensors constantly monitor every aspect of the system, they shift with precisely and without chain rub.

Many major systems have customizable shifting. Some have the ability to add remote shifters for common riding positions, and some even allow you to change the functions of the shifting buttons.

Electronic groupsets are responsive and consistent. There are no cables to stretch and wear out, so you get a flawless shift every time. The added bonus is you’ll never have to replace a derailleur cable ever again.

A dropper seatpost allows you to quickly lower and raise your seat to give you an ideal riding position. Dropping your seat creates a lower center of gravity for better control and maneuverability on steep descents, while raising it puts you at normal riding height for efficient pedaling.

Construction can include either hydraulic- or cable-actuated systems and the post’s travel can either be infinitely adjustable or stopped at set intervals, depending on the model.

Dropper seatposts come in standard lengths and diameters and vary by the amount of travel.


Motor NEW Bosch Performance Line CX, 250 Watt, 75Nm, magnesium body
Battery Bosch PowerTube, 625Wh
Display Bosch Kiox with Anti-theft solution
Max Assisted Speed 20mph
Frame OCLV Mountain Carbon main frame and stays, Removable Integrated Battery (RIB), tapered head tube, Control Freak internal routing, magnesium rocker link, Motor Armor, Mino Link, ABP, Boost148, 12mm thru axle, 150mm travel
Fork RockShox Lyrik Ultimate, DebonAir spring, Charger 2 RC2 damper, e-MTB optimized, tapered steerer, 42mm offset, Boost110, 15mm Maxle Stealth, 160mm travel
Rear Shock RockShox Deluxe RT3, DebonAir spring, RE:aktiv w/Thru Shaft damper, 230x57.5mm
Axles Front: Boost 110, 15mm Maxle Stealth
Rear:Boost 148, 12mm thru axle
Rims/Wheels Bontrager Line Carbon 30, Tubeless Ready, 54T Rapid Drive, 6-bolt, SRAM XD driverBoost110 front, Boost148 rear
Tires Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29x2.60"
Crankset E*thirteen E*spec Race carbon, 34T
Chain SRAM GX Eagle, 12 speed
Rear Derailleur SRAM X01 Eagle AXS
Cassette/Rear Cogs SRAM XG-1295 Eagle, 10-50, 12 speed
Shifters SRAM Eagle AXS, wireless, 12 speed
Handlebars Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise
Stem Bontrager Line Pro, 35mm, Knock Block, 0 degree
Brakes Shimano XT M8120 4-piston hydraulic disc, 180mm rotor
Pedals VP-536 nylon platform
Saddle Bontrager Arvada, austenite rails, 138mm width
Seatpost RockShox Reverb AXS, wireless, 31.6mm

* Subject to change without notice.


Part Numbers

Option UPC MPN Store SKU
Gloss Purple Phaze/Matte Raw Carbon / Small 601842338094 599221 RAI45351742N
Gloss Purple Phaze/Matte Raw Carbon / Medium 601842338100 599222 RAI45285220N
Gloss Purple Phaze/Matte Raw Carbon / Large 601842338117 599223 RAI4510324N
Gloss Purple Phaze/Matte Raw Carbon / X-Large 601842338124 599224 RAI46907344N
Matte Raw Carbon/Gloss Trek Black / Small 601842198957 593272 RAI43314672K
Matte Raw Carbon/Gloss Trek Black / Medium 601842198940 593273 RAI43670369K
Matte Raw Carbon/Gloss Trek Black / Large 601842198933 593274 RAI43896499K
Matte Raw Carbon/Gloss Trek Black / X-Large 601842198926 593275 RAI44487812K
Solid Charcoal to Root Beer Ano Decal / Small 601842338179 599229 RAI46307472L
Solid Charcoal to Root Beer Ano Decal / Medium 601842338186 599230 RAI46610740L
Solid Charcoal to Root Beer Ano Decal / Large 601842338193 599231 RAI46142091L
Solid Charcoal to Root Beer Ano Decal / X-Large 601842338209 599232 RAI47508281L
Solid Charcoal/Radioactive Orange / Small 601842338131 599225 RAI45412839E
Solid Charcoal/Radioactive Orange / Medium 601842338148 599226 RAI45374711E
Solid Charcoal/Radioactive Orange / Large 601842338155 599227 RAI45370477E
Solid Charcoal/Radioactive Orange / X-Large 601842338162 599228 RAI46443536E
Matte Trek Black/Gloss Viper Red / Small 601842209172 594206 RAI42789858D
Matte Trek Black/Gloss Viper Red / Medium 601842209165 594207 RAI42506919D
Matte Trek Black/Gloss Viper Red / Large 601842209158 594208 RAI42435615D
Matte Trek Black/Gloss Viper Red / X-Large 601842209141 594209 RAI43778477D