ROSE Bikes GRX FC-RX820-1 Hollowtech II Crankset Single x 12-Speed, 42 Teeth| Road And Cross

United in Gravel!
With a clear focus on the heart and soul of gravel biking, SHIMANO’s mechanical GRX series now gets a 12-speed update to deliver top performance!
Simplicity and reliability build the basis for the new 12-speed GRX line-up and allow you to enjoy off-road adventures of a special kind!

While developing the GRX FC-RX820 single-speed crankset, SHIMANO’s developers have paid particular attention to the needs of modern cross, gravel and commuter bikes.
That’s because the crankset offers a balance between weight savings, optimised efficiency and a range of gear options to meet the varying demands of riding in mixed terrain. By combining a 10-45 tooth or 10-51 tooth cassette, you can either choose a narrower gear ratio or maximum gear range.

Details:
Crankset for SHIMANO 12-speed gravel/cross bike drivetrains
Two-piece Hollowtech II design with integrated axle
Hollow forged aluminium crank arms
4-arm construction for efficient power transmission

Technical details:
Intended use: Gravel, Road, Cyclocross
Series: GRX
Model: FC-RX820-1
Material crank arms: aluminium (hollow)
Material chainring: aluminium/composite (large), aluminium (small)
Gears: single x 12-speed
Axle: integrated (Hollowtech II)
For a shell width of: 68 / 70 mm (for threaded bottom brackets)
Bolt circle: 110 mm/ 80 mm (asymmetric)
Chainline: 49.7 mm
Q factor: 151 mm
Weight: approx. 656 g

Available gear ratios:
42 teeth

Available with crank arm length:
172.5 mm
175 mm
Please indicate your choice.

Recommended bottom bracket:
BSA/Italian: SM-BBR60 (prod. code: 1955804)
PressFit: SM-BB72-41B (prod. code: 1955813)

Recommended chain:
SHIMANO 12-speed HG+ (e.g. CN-M8100, prod. code: 2286358)

In the box:
1 SHIMANO GRX FC-RX820 crankset single x 12-speed (WITHOUT bottom bracket cups)