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Rockrider 27.5" Mountain Bike ST 900 S

Travel
120 / 120 mm Fork / rear shock
Wheels
27.5″
Brakes
Hydraulic disc

Not published by the manufacturer

  • Sizes and geometry

Components

5 of 5 identified

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.

Suspension

2 parts
  • Fork
  • Rear shock

Drivetrain

1 part
  • Crankset

Specifications

Frame and fork

Intended fit
  • Unisex

Suspension

Suspension configuration
  • Full suspension
Front travel
  • 120 mm
Rear travel
  • 120 mm

Drivetrain

Derived by Bikelake
Front chainrings
  • 1
Smallest chainring
  • 46
Largest chainring
  • 46

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

120 mm

This value is within the central range for this class.

Cohort
Mountain / Trail Model year: 2025
Sample
1,808 bicycles with this information
Coverage
97.5% of the class

Shifting

Mechanical

387 of 1,847 bicycles with this information use electronic shifting.

Cohort
Mountain / Trail Model year: 2025
Sample
1,847 bicycles with this information
Coverage
99.6% 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 2025 builds

Differences across 2025 builds
Specification This bicycle Rockrider 27.5" Mountain Bike ST 900 S Rockrider 27.5" Rockrider 27.5" Mountain Bike ST 530 Rockrider 27.5" Mountain Bike ST 540 Rockrider 29" Mountain Bike 540 S EXPL-Green Rockrider Kids' Mountain Bike 24" 9-12 Years Expl 900
Frame
Bicycle weight Not informed 15.4 kg Not informed 14 kg 14.1 kg 12.1 kg
Frame material Not informed Not informed Not informed Not informed Aluminum Not informed
Suspension
Suspension configuration Full suspension Hardtail Full suspension Full suspension Full suspension Hardtail
Front travel 120 mm 80 mm 120 mm 100 mm 32 mm 50 mm
Rear travel 120 mm Not informed 120 mm Not informed Not informed Not informed
Drivetrain
Front chainrings 1 Not informed 2 Not informed Not informed 2
Smallest chainring 46 Not informed 11 Not informed Not informed 11
Largest chainring 46 Not informed 42 Not informed Not informed 36
Brakes
Brake type Hydraulic disc Rim brake Hydraulic disc Hydraulic disc Hydraulic disc Mechanical disc
Cockpit
Seatpost Not informed Not informed Not informed Rigid seatpost Not informed Not informed
Other specifications
Fork spring Air Not informed Not informed Not informed Air Not informed
Suspension Full suspension Hardtail Full suspension Full suspension Full suspension Hardtail
Wheel size 27.5″ 27.5″ 27.5″ 27.5″ 29″ 24″
Tire width Not informed 2″ 23c 23c 2.1″ Not informed
Wheel material Not informed Not informed Aluminum Aluminum Aluminum Aluminum
Bottom bracket standard Not informed Not informed Not informed Not informed BB86/BB92 Not informed

Other models in this family

10 models

Published versions from the same family and model year.

Rockrider 27.5" Mountain Bike ST 900 S, by Rockrider

This bicycle

Trail

27.5" Mountain Bike ST 900 S

  • Suspension: 120 mm
Rockrider 27.5", by Rockrider

Cross-country

27.5"

Mountain / Cross-country

  • Weight: 15.4 kg
  • Suspension: 80 mm

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