Bike Comparison
    MSRP
    ($2,151)$8,500
    Where to Buy
    $1

    At

    $8,500

    At Specialized

    Category
    Trail, E-BikeTrail
    Weight
    48.3 lbs26.7 lbs
    9.7
    AluminumCarbon
    Fork
    RockShox JudyFox Factory Float 34
    Shock
    Fox Float X Factory
    Wheels
    Carbon
    27.5″29″
    Brakes
    Hydraulic DiscHydraulic Disc
    Brose 70Nm mid-drive
    Groupset
    DeoreX0 Eagle Transmission, X01 Eagle AXS
    Drivetrain
    1 × 12 Electronic
    Suspension
    HardtailFull
    Front Travel
    120mm130mm
    Rear Travel
    -120mm
    Brand Site

    decathlon.co.uk

    specialized.com

    Summary
    The Rockrider E-ST 900 ELECTRIC MOUNTAIN BIKE, - 27.5+ is a 27.5″ aluminum frame hardtail trail e-bike with modest components.
    Similar Bikes
    Accessories
    Ride Feel

    Based on frame geometry and build specs.

    Terrain
    easyextreme
    Handling
    nimblestable
    2024 Epic 8 EVO Pro
    Other Trail 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)

    28 mph

    2024 Epic 8 EVO Pro

    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

    FACT 11m Carbon, Progressive XC Race Geometry, Rider-First Engineered™, SWAT downtube storage, threaded BB, 12x148mm UDH compatible rear dropout, internal cable routing, 120mm of travel

    Fork

    Ride over obstacles (roots, pebbles, stones, etc.) easily thanks to the Rockshox JUDY fork with 120 mm of travel. This fork has:, - a thru axle and tapered steerer tube for more durability. - pneumatic spring for optimal adjustment based on your weight, - rebound adjustment and lockout for better control, depending on the terrain.

    Travel130mm

    Spring TypeAir

    Fox 34 Factory, Grip2 Damper, 4 way adjust, 130mm travel, 44mm offset, 15x110mm

    Travel130mm

    Spring TypeAir

    Shock

    Fox Float Factory, Evol LV, Ride Dynamics Tuned, LSC/ Rebound adjust, 190x45mm

    Bottom Bracket

    SRAM DUB Threaded Wide

    Stem

    Raceface Turbine R, 50mm, 35mm clamp

    Handlebar

    Roval Control Rise Carbon Handlebar, 780mm wide, 20mm rise, 35mm

    Saddle

    Since your mountain bike rides will get longer and longer, it is important to sit comfortably. So our teams designed the exclusive ROCKRIDER Ergofit Pro saddle. It fits all hip sizes and has a curved shape that is particularly good for sport trail rides. The 31.6 mm aluminium seat tube ensures compatibility with most dropper and suspension seat posts on the market.

    Body Geometry Power Expert

    Seatpost

    Fox Transfer Factory, 30.9, 1X remote, (SM:125mm, MD: 150mm, L-XL: 175mm)

    Grips

    Specialized Trail Grips

    Groupset
    Rear Derailleur

    SRAM X0 Eagle Transmission

    Crank

    The E-ST900 electric bike is equipped with a single chainring and ChainFlow 3D anti-drop technology to prevent chain drops. A single shifter on the right handlebar makes it easy to shift between the 10 speeds. In detail:, - ChainFlow anti-derailment 34-tooth chainring, - SHIMANO DEORE M6000 Shadow+ 10-speed rear derailleur with long cage, - SHIMANO DEORE M6000 right shifter, - SHIMANO DEORE 10-cog cassette (11-42 teeth), - KMC E10 Turbo special e-bike chain

    SRAM X0 Eagle, DUB, 170/175mm, Alloy, 32T

    Shifters

    SRAM AXS POD Controller

    Cassette

    SRAM XS 1295, 12 speed, 10-52

    Chain

    SRAM X0 Eagle

    Brakes

    No matter the conditions you ride in (dry, muddy, wet), the Tektro TKD32 hydraulic disc brakes on the front and rear provide powerful, progressive braking. Oversized 180mm diameter discs provide even more power.

    Front: SRAM Code Silver Stealth, 4-piston caliper, hydraulic disc, 180/200mm HS2 rotor, Rear: SRAM Code Silver Stealth, 4-piston caliper, hydraulic disc, 180mm HS2 rotor

    Wheels
    Rims

    Roval Control, Carbon offset design, 29mm internal width, 4mm hook width, Tubeless ready, 28h

    Spokes

    Stainless, 14g, black

    Front Hub

    Industry Nine 1/1, 6-bolt, 15mm Thru-axle, 110mm spacing, 28h

    Rear Hub

    Industry Nine 1/1, 12x148mm thru axle, XD freehub body, 28h

    Tires

    So you feel safe on any terrain, and to provide traction suited to your motor, the E-ST900 mountain bike is equipped with Hutchinson Taipan Koloss 27.5+ tyres with a 2.8" cross-section. Our test riders particularly liked these tyres for their good grip. Mounted on wide rims, these tyres ensure grip, traction and comfort on any terrain.

    Front: Specialized Purgatory, GRID Casing, T9 Compound, 29x2.4, Rear: Specialized Ground Control, GRID Casing, T7 Compound, 29x2.35

    Electric Components
    Motor

    The BROSE T Aluminium central motor is specially designed for high altitude mountain biking:, - 70 Nm torque to handle large obstacles and steep gradients, - metal housing for maximum durability, - belt for an ultra-quiet motor, - sealed bearings to hold up to tough environments while mountain biking

    Battery

    Our Rockrider mountain bike team has designed a battery that locks in place with a simple lever. Child's play! This locking system stops the battery getting shaken when you go adventuring on rough terrain. A key lock is also installed if you want to protect your battery from theft. For example, if you park your bike in the street.

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