Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.
The BROSE T Aluminium central motor is specially designed for 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
Crown, PopLoc Remote (17mm cable pull - sold separately)
Volume reducer
n/a
Spring
Coil
As the bicycle's manufacturer lists it
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 conical pivot for more durability. - pneumatic spring for optimal adjustment based on your weight - rebound adjustment and lockout for better control, depending on the terrain.
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
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.
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 grip on the ground. Mounted on wide rims, these tyres provide great grip, traction, and comfort on any terrain.
Sizes and geometry
3 sizes
Size explorer
Understanding sizes and measurements
Height ranges are reported by the manufacturer. A matching range is a starting point, not a guarantee of fit. Your proportions and bike setup also matter.
Reach is the horizontal distance from the bottom bracket to the top of the head tube; stack is the vertical distance.
Positive values mean more reach or stack than the reference size; zero means the same measurement. Missing values are not estimated.
Enter your height to highlight matching ranges.
SizeReported by the manufacturer
150160170180190
Geometry not published
The manufacturer lists these sizes without frame measurements, so there is no drawing or geometry table.
Specifications
Frame and fork
Intended fit
womens
Suspension
Suspension configuration
Hardtail
Front travel
120 mm
Drivetrain
Derived by Bikelake
Front chainrings
2
Smallest chainring
11
Largest chainring
42
Wheels and brakes
Wheel configuration
Same size
Brake type
Hydraulic disc
Fit and controls
Shifting
Mechanical
Additional specifications
Fork spring
Coil
Tire width
2.8″
Wheel size
27.5″
Technical analysis
2 measures
How these figures sit among bicycles of the same class and model year. Context, not a ranking.
Front travel
How we calculated this
Observed range: 100 mm to 170 mm. Median: 130 mm.
120mm
This value is within the central range for this class.
120 mmTypical range150 mm
Cohort
Mountain / Trail
Model year: 2021
Sample
1,324 bicycles with this information
Coverage
98.1% of the class
Shifting
How we calculated this
This analysis describes frequency, not preference.
Mechanical
53 of 1,346 bicycles with this information use electronic shifting.
Electronic 3.9%Mechanical 96.0%
Cohort
Mountain / Trail
Model year: 2021
Sample
1,346 bicycles with this information
Coverage
99.7% of the class
Lineup changes
The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.
Differences across 2021 builds
Differences across 2021 builds
Specification
This bicycle
Rockrider Women's Electric Mountain Bike E-ST900 27.5"