MSRP | ($2,151) | $8,500 |
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Where to Buy | — $1 At | $8,500 At Specialized |
Category | Trail, E-Bike | Trail |
Weight | 48.3 lbs | 26.7 lbs |
Aluminum | Carbon | |
Fork | RockShox Judy | Fox Factory Float 34 |
Shock | Fox Float X Factory | |
Wheels | Carbon | |
27.5″ | 29″ | |
Brakes | Hydraulic Disc | Hydraulic Disc |
Brose 70Nm mid-drive | ||
Groupset | Deore | X0 Eagle Transmission, X01 Eagle AXS |
Drivetrain | 1 × 12 Electronic | |
Suspension | Hardtail | Full |
Front Travel | 120mm | 130mm |
Rear Travel | - | 120mm |
Brand Site | ||
Summary | The Rockrider E-ST 900 ELECTRIC MOUNTAIN BIKE, - 27.5+ is a 27.5″ aluminum frame hardtail trail e-bike with modest components. |
Based on frame geometry and build 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 | |
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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. Travel: 130mm Spring Type: Air | Fox 34 Factory, Grip2 Damper, 4 way adjust, 130mm travel, 44mm offset, 15x110mm Travel: 130mm Spring Type: Air |
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 |
Rear Derailleur | SRAM X0 Eagle Transmission | |
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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 |
Rims | Roval Control, Carbon offset design, 29mm internal width, 4mm hook width, Tubeless ready, 28h | |
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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 |
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 | |
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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. |