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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.
Why you'll love it
- 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
- 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
- RE:aktiv with Thru Shaft works faster than a normal shock, so it tracks the ground better and keeps you in control
- 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
- 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 Walkthrough
*Please note - spec applies to all sizes unless listed separately
| Frame | NEW OCLV Mountain Carbon main frame, 1.8" lower head tube, 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 2.1 RC2 damper, e-MTB optimzed crown, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 160mm travel |
| Shock | RockShox Super Deluxe Thru Shaft, AirWiz, 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, 29'' |
|---|---|
| Wheel rear | Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12mm thru axle, 29'' |
| 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, 180 ml/6 oz |
| Size: S, M, L, XL Quarq TyreWiz tire pressure monitors |
|
| Rim strip | Bontrager TLR |
| Max tire size | Frame: 29x2.60", Fork: See manufacturer |
| *Battery | Size: S Bosch PowerTube 625Wh, smart system |
|---|---|
| Size: M, L, XL Bosch PowerTube 750Wh, smart system |
|
| Charger | Bosch standard 4A, 230V, smart system |
| *Computer | Size: S, M, L, XL Bosch Kiox 300, smart system |
| Size: S, M, L, XL Bosch LED remote, smart system |
|
| Motor | Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm |
| Shifter | SRAM Eagle AXS, wireless, 12 speed |
|---|---|
| Rear derailleur | SRAM XX1 Eagle AXS |
| Crank | E*thirteen E*spec Race carbon, 165mm length |
| Chain ring | SRAM X-SYNC 2, 34T, alloy |
| Cassette | SRAM Eagle XG-1299, 10-52, 12 speed |
| Chain | SRAM XX1 Eagle, 12 speed |
| Pedal | VP-536 nylon platform |
| Max chainring size | 1x: 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, Blendr compatible, 0 degree, 45mm length |
| Headset | Knock Block Integrated, cartridge bearing, 1-1/8'' top, 1.8'' bottom |
| Brake | SRAM Code RSC hydraulic disc |
| *Brake rotor | Size: S, M, L, XL SRAM CenterLine, 6-bolt, round edge, 220mm |
| Size: S, M, L, XL SRAM CenterLine, 6-bolt, round edge, 200mm |
| Weight | M - 22.54 kg / 49.7 lbs (with TLR sealant, no tubes) |
|---|---|
| Weight limit | This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). |
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.
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