Bike Comparison
    MSRP
    $13,799
    Where to Buy
    $7,299

    48% off At Trek

    Category
    Enduro, E-Bike
    Weight
    52.0 lbs
    9.5
    Carbon
    Fork
    RockShox ZEB Ultimate
    Shock
    RockShox Super Deluxe
    Wheels
    Carbon
    29″
    Brakes
    Hydraulic Disc
    Bosch 600W 85Nm mid-drive
    Bosch 625Wh
    Groupset
    XX1 Eagle AXS, X01 Eagle AXS
    Drivetrain
    1 × 12 Electronic
    Suspension
    Full
    Front Travel
    160mm
    Rear Travel
    150mm
    Brand Site

    trekbikes.com

    Summary
    The Trek Rail 9.9 XX1 AXS Gen 4 is a 29″ carbon frame full suspension enduro e-bike with ultra high-end components.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Terrain
    easyextreme
    Handling
    nimblestable
    Rail 9.9 XX1 AXS Gen 4
    Other Enduro bikes
    Gear Range

    A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

    Lowest gear

    (climbing)

    29 mph

    Rail 9.9 XX1 AXS Gen 4

    Highest gear

    (descending)

    Spec Level

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

    Geometry
    Specs
    Frame

    OCLV Mountain Carbon main frame, 1.8'' lower head tube, Bosch System Controller-compatible, Removable Integrated Battery (RIB), Knock Block 2.0, guided internal routing, 34.9 mm seat tube, magnesium rocker link, Motor Armour, Mino Link, ABP, Boost148, 12 mm thru-axle, 150 mm travel

    BB StandardBosch, Press Fit

    Tire Clearance2.6"

    Fork

    RockShox ZEB Ultimate, AirWiz, DebonAir spring, Charger 3 RC2 damper, 1.8" oversized tapered steerer, eMTB optimised crown, 44 mm offset, Boost110, 15 mm Maxle Stealth, 160 mm travel

    Shock

    RockShox Super Deluxe Thru Shaft, AirWiz, 230 mm x 57.5 mm

    Bottom Bracket

    Bosch, press-fit

    Stem

    Bontrager Line Pro, 35 mm, Blendr-compatible, 0-degree, 45 mm length

    Handlebar

    Bontrager Line Pro, OCLV Carbon, 35 mm, 27.5 mm rise, 780 mm width

    Saddle

    Bontrager Arvada, austenite rails, 138 mm width

    Seatpost

    Size: S, RockShox Reverb AXS, 100 mm travel, wireless, 34.9 mm, 340 mm length; Size: M, RockShox Reverb AXS, 150 mm travel, wireless, 34.9 mm, 440 mm length; Size: L, XL, RockShox Reverb AXS, 170 mm travel, wireless, 34.9 mm, 480 mm length

    Pedals

    VP-536 nylon platform

    Grips

    Bontrager XR Trail Elite, nylon lock-on

    Groupset
    Rear Derailleur

    SRAM XX1 Eagle AXS

    Crank

    E*thirteen E*spec Race carbon, 165 mm length

    Shifters

    Size: S, M, L, XL, SRAM Eagle AXS, wireless, 12-speed; Size: S, M, L, XL, SRAM Eagle AXS, wireless, 12 speed

    Cassette

    SRAM Eagle XG-1299, 10-52, 12-speed

    Chain

    SRAM XX1 Eagle, 12-speed

    Brakes

    SRAM Code RSC 4-piston hydraulic disc

    Wheels
    Rims

    Front: Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, 6-bolt, Boost110, 15 mm thru-axle, 29", Rear: Bontrager Line Pro 30, OCLV Mountain Carbon, Tubeless Ready, Rapid Drive 108, 6-bolt, SRAM XD driver, Boost148, 12 mm thru-axle, 29"

    Tires

    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"

    Disc Rotors

    Size: S, M, L, XL, SRAM 6-bolt, 200 mm; Size: S, M, L, XL, SRAM HS2, 6-bolt, 220mm

    Electric Components
    Motor

    Bosch Performance Line CX, smart system, magnesium motor body, 85 Nm

    Battery

    Size: S, Bosch PowerTube 625Wh, smart system; Size: M, L, XL, Bosch PowerTube 750Wh, smart system

    Charger

    Bosch standard 4A, 230V, smart system

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