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Trek Rail 9.9 XT Electric Mountain Bike 2021

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Rail 9.9 XT Electric Mountain Bike 2021

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Product ID: 1296675

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Trek Rail 9.9 XTR Electric Mountain Bike 2021

The Trek Rail 9.9 XTR is an aggressive, long-travel Electric Mountain Bike crafted from carbon and at home on the trails. Kick up climbs with an ample 250w of assistance at up to 25 km/h with the Bosch Performance CX motor, lighter and more compact than its predecessors for sleek integration, and remove the Bosch Powertube 625 battery from the downtube for simplified charging, no tools required. There's room to mount a bottle cage even with the inclusion of Bosch's most powerful battery, which completes a full charge in a little under five hours.

The top-tier Rockshox ZEB Ultimate fork provides a hefty 160mm of travel with chunky stanchions that won't flex, whilst 150mm of rear travel in the RockShox Super Deluxe Ultimate shock is ultra-responsive thanks to the RE:aktiv Thru Shaft damper, which serves to elevate rider control and quieten rough trail chatter.

Shimano XTR 12-speed components ensure shifting is refined, smooth and crisp, with gearing options to maintain even pedal strokes over the most testing gradients so that motor function remains consistent. 4-piston hydraulic disc brakes lend unflinching stopping power, whilst large volume, tubeless-ready tyres and wide rims make for fast-rolling fun with improved traction and grip where needed. Flip the Mino Link to quickly adjust geometry, and get the saddle out of the equation swiftly with the Bontrager Line Elite Dropper seatpost - ideal when shifting weight over the back wheel.

Battery Specification

  • Maximum assist: 250w
  • Motor weight: 2.9kg
  • Battery Power: Approximately 625Wh


  • Trek OCLV Mountain Carbon frame with RIB
  • RockShox ZEB Ultimate, DebonAir spring fork with 160mm travel
  • Shimano XTR 12-speed components
  • Shimano M9120 4-piston hydraulic disc brakes
  • 29” wheels with 2.60” tubeless-ready tyres
  • Bontrager Line Elite Dropper seatpost gets the saddle out of the way quickly
  • Bosch Performance CX 250W motor
  • Bosch PowerTube 625 battery

Technical Specification

Frame Trek OCLV Mountain Carbon main frame and stays, Removable Integrated Battery (RIB), tapered head tube, Knock Block, Control Freak internal routing, magnesium rocker link, Motor Armor, Mino Link, ABP, Boost148, 12mm thru-axle, 150mm travel
Fork RockShox ZEB Ultimate, DebonAir spring, Charger 2.1 RC2 damper, e-MTB optimised crown, tapered steerer, 44mm offset, Boost110, 15mm Maxle Stealth, 160mm travel
Rear Shock RockShox Super Deluxe Ultimate RT3, DebonAir spring, Thru Shaft 3-position damper, 230x57.5mm
Headset Trek Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8" top, 1.5" bottom
Stem Bontrager Line Pro, 35mm, Knock Block, Blendr compatible, 0 degree
Handlebar Bontrager Line Pro, OCLV Carbon, 35mm, 27.5mm rise
Grips Bontrager XR Trail Elite, alloy lock-on
Front Brake Shimano XTR M9120 4-piston hydraulic disc
Rear Brake Shimano XTR M9120 4-piston hydraulic disc
Brake Levers Shimano XTR M9120 4-piston
Rear Derailleur Shimano XTR M9100, Shadow Plus, long cage, 51T max cog
Shift Levers Shimano XTR M9100, 12-speed
Chain Shimano XTR M9100, 12-speed
Cassette Shimano XTR M9100, 10-51, 12-speed
Crankset E*thirteen E*spec Race carbon, 34T
Front Wheel Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110
Rear Wheel Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost148
Front Tyre Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29x2.60" clincher
Rear Tyre Bontrager SE5 Team Issue, Tubeless Ready, Core Strength sidewall, aramid bead, 60 tpi, 29x2.60" clincher
Saddle Bontrager Arvada, austenite rails, 138mm width
Seatpost Bontrager Line Elite Dropper, internal routing, 31.6mm
Pedals VP-536 nylon platform
Claimed Manufacturers Weight Size M - 21.71kg / 47.86lbs (with tubes)
Charge time 100% charge, 4.9 hours with Standard Charger
Motor Bosch Performance CX, magnesium motor body, 250 watts, 75 Nm, 25km/h
Ui/Remote Bosch Kiox with Anti-theft solution
Battery Bosch PowerTube 625
Charger Bosch standard 4A (220-240 V) charger

Trek Rail 9.9 XT Electric Mountain Bike 2021 Sizing

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