SHIMANO GRX FC-RX820 1x12-SPEED CRANKSET 42T

The Shimano GRX FC-RX820-1 HOLLOWTECH II crankset delivers lightweight performance engineered for mixed terrain riding.

Its 1x12-speed drivetrain provides tighter gear graduations that maintain smooth cadence across gravel and variable surfaces. The 42T chainring offers versatile gearing for climbing and acceleration, while HOLLOWTECH II construction minimises weight without compromising rigidity. Designed specifically for gravel riding demands, this crankset balances efficiency with the durability needed for unpredictable terrain.

Features

• Gravel gear ratios preserve riding rhythm over rough surfaces with wider tyres
• Optimum gearing for mixed terrains and riding styles
• 10-45T and 10-51T cassette options serve array of riding styles

Specification

• Use: Gravel, Cyclocross
• Group: GRX
• Model: FC-RX820-1
• Gradation: 42T
• Q-Factor: 151mm
• Threaded BB shell width: 68 / 70mm
• Gear front: 1-speed 
• Gear rear: 12-speed
• Construction: Hollowtech II
• Compatible Chain: 12-speed HG
• PCD: 110mm
• Chain line: 49.7mm
• Recommended BB Pressfit: SM-BB72
• Recommended BB BSA: SM-BBR60

Crank Arm Length

• 170mm
• 172.5mm
• 175mm

Material

• Crank arm: Aluminium Anodized
• Crank axle: Steel Plated
• Chainring: Aluminium Anodized

Colour

• Series colour

Weight

• Approx. 667g - 172.5mm

Contents

• 1 x Shimano GRX 1x12-Speed Crankset FC-RX820 42T

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.

Weights are based off pre-production products at time of publication. Weights may vary in final production.