2021 Trek Rail 9.7

A 29″ carbon frame full suspension enduro e-bike with high-end components. Compare the full range

2021 Trek Rail 9.7
Weight50.2 lbs
Travel150mm rear, 160mm front
ForkRockShox Yari RC

Tire Clearance2.6"
Drivetrain1 × 12
GroupsetNX Eagle, X1

MotorBosch 250W 85Nm mid-drive
BatteryBosch 625Wh (♻️ Call2Recycle supporter)
BrakesHydraulic Disc
Where to Buy
Similar Bikes Available Now
Compare With Similar Bikes

View more similar bikes »

Estimated Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more »

Spec level →$0$1,000$2,000$3,000$4,000$5,000$6,000$7,000$8,000
This bike
Other enduro bikes

Vital MTB logo
2022 Trek Rail 9.9 XX1 AXS E-Bike


An excellent e-bike with a lot of electronics.

  • Well rounded ride

  • Suspension quality

  • Powerful Bosch motor

  • Seat angle could be steeper

  • Vulnerable Bosch controller and Kiox

Apr 2022Read Review

Bike Perfect logo
Trek Rail 9.9 first ride review: fully tech-loaded flagship, long travel, e-MTB

Guy Kesteven

Trek’s Rail 9.9 eMTB is loaded with carbon fiber and wireless tech. Guy Kesteven explores what the pricey Bosch powered flagship is like to ride on a wet and rocky Lake District demo loop

Mar 2022Read Review

Outdoor Gear Lab logo
Trek Rail 9.7

Jeremy Benson

The Rail 9.7 is a powerful electric mountain bike from the Trek Bicycle Company. This 29er has 150mm of rear-wheel travel paired with a 160mm fork and a...

  • Powerful motor

  • Good distance range

  • Well-rounded performance

  • Battery or motor rattle

  • Expensive

  • Sluggish handling at low speeds

Mar 2022Read Review

Electric Bike Review logo
Trek Rail 9.9 XX1 AXS Review

Price: $13549.99.00 | Model Year: 2021, 2022 | Trek's best long-travel electric mountain bike, designed for All Mountain and Enduro Riding. Light weight optimum compaction low void (OCLV) carbon fiber and magnesium frame comes in three sizes. Flip chip spacer in the rear swing arm further refines geometry for low and high settings.

  • Trek's best long-travel electric mountain bike, designed for All Mountain and Enduro Riding. Light weight optimum compaction low void (OCLV) carbon fiber and magnesium frame comes in three sizes. Flip chip spacer in the rear swing arm further refines geometry for low and high settings.

  • Available in three premium color schemes, the bike is setup with 29" wheels but can accommodate 27.5" or a mixed mullet setup (smaller rear wheel, larger front). Sturdy 12mm and 15mm thru-axles with Boost hub spacing offer stronger spoke bracing angle. Magnetic 6mm hex wrench quick release lever makes trail-maintenance convenient.

  • SRAM AXS wireless electronic shifting, dropper post, and air pressure settings and alerts for the tires and suspension. Bosch Smart System LED Remote, Kiox 300 display, PowerTube 750 battery, and CX motor with eBike Flow app. Premium quad-piston hydraulic disc brakes with extra-large 220mm front extra thick front rotor. Bottle cage bosses and ABUS keyed-alike code keyset.

  • Excellent weight positioning with the motor and battery low and center, but the PowerTube 750 goes from 9.7lbs to 10.8lbs with the color-matched Trek RIB cover and handle. Longer wheelbase due to longer battery design. Two smartphone apps required to configure all of the electronics (SRAM AXS and Bosch eBike Flow). No USB charging with the Bosch LED Remote despite having a USB-C port built in.

Jan 2022Read Review

Bicycling logo
The Trek Rail 9.9 AXS eMTB Encompasses Greatness That Is Bedeviled by Gremlins

Great performance e-bike, killer motor tune, but so many glitchy electronic accessories.

Oct 2021Read Review

Beta logo
Trek Introduces the 2022 Rail 9.9 and 9.8 E-Bikes


Longer, lower, smarter

Oct 2021Read Review

Pinkbike logo
First Ride: 2022 Trek Rail 9.9 - More Battery Power & Updated Geometry

Matt Beer

The Rail 9.9 now has a 750Wh battery and geometry numbers that are similar to the Slash's.

Oct 2021Read Review

NSMB logo
Trek Rail 9.8 XT Review

Trek's Rail e-bike platform is smooth, powerful, and successfully walks the line between trail bike and something bigger.

Jun 2021Read Review



5'0" – 5'6"


5'6" – 6'1"


5'9" – 6'3"


6'1" – 6'6"

🐐 Estimated


OCLV Mountain Carbon main frame, Removable Integrated Battery (RIB), tapered head tube, Knock Block, Control Freak internal routing, magnesium rocker link, Motor Armour, Mino Link, ABP, Boost148, 12 mm thru axle, 150 mm travel

Tire Clearance2.6"

ColorsRaw Carbon / Volt; Lithium Grey / Trek Black; Gloss Purple Phaze / Matte Raw Carbon; Solid Charcoal / Radioactive Orange; Solid Charcoal to Root Beer Ano Decal


RockShox Yari RC, DebonAir spring, Motion Control RC damper, e-MTB optimised, tapered steerer, 42 mm offset, Boost110, 15 mm Maxle Stealth, 160 mm travel

Rear Shock

RockShox Deluxe Select+, 230 mm x 57.5 mm


Knock Block Integrated, 58-degree radius, cartridge bearing, 1-1/8'' top, 1.5'' bottom


Size: S, M, L, XL, Bontrager Rhythm Comp, 31.8 mm, Knock Block, 0-degree, 50 mm length; Size: S, M, L, XL, Bontrager Rhythm Comp, 31.8mm, Knock Block, 0-degree, 60 mm length


Bontrager Comp, alloy, 31.8 mm, 15 mm rise, 780 mm width


Bontrager Arvada, steel rails, 138 mm width


Size: S, Bontrager Line Dropper, 100 mm travel, internal routing, 31.6 mm, 345 mm length; Size: M, L, XL, Bontrager Line Dropper, 150mm travel, internal routing, 31.6 mm, 440mm length


Bontrager XR Trail Comp, nylon lock-on

Rear Derailleur



SRAM X1 1000, 34T, 165 mm length


SRAM NX Eagle single-click, 12-speed


SRAM PG-1230 Eagle, 11-50, 12-speed


SRAM NX Eagle, 12-speed


Shimano 4-piston hydraulic disc, M6100 lever, M6120 calliper


Bontrager Line Comp 30, Tubeless Ready, 6-bolt, Boost110, 15mm thru axle


14g stainless

Front Hub

Bontrager alloy, sealed bearing, alloy axle, 6-bolt, Boost110, 15 mm thru axle


Bontrager XR5 Team Issue, Tubeless Ready, Inner Strength sidewall, aramid bead, 120 tpi, 29x2.60"

Disk Rotors

Shimano RT76, 6-bolt, 203 mm

Electric Components

Bosch Performance CX, magnesium motor body, 250 watt, 85 Nm, 25 km/h (15.5 mph) max assist, 32 km/h for New Zealand


Bosch PowerTube 625


Bosch standard 4A, 220–240V

Riders Also Viewed