GRX FC-RX820-1 Hollowtech II Crankset Single x 12-Speed, 42 Teeth

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)