SHIMANO GRX FC-RX820 2x12-SPEED CRANKSET 48/31T

The GRX FC-RX820-2 HOLLOWTECH II 2 x 12-speed crankset combines lightweight construction with exceptional efficiency for mixed terrain riding.

Purpose-built for gravel cycling, the dual chainring setup delivers tighter gear graduations that maintain smooth cadence across variable surfaces. The 48/31T ratio provides versatile coverage for climbing and acceleration, while HOLLOWTECH II technology ensures durability without excess weight. Ideal for riders seeking responsive performance on unpredictable terrain.

Features

• Gravel gear ratios preserve riding rhythm over rough surfaces with wider tires
• Optimum gearing for mixed terrains and riding styles
• Wider range front system
• 17T range covers array of riding conditions

Specification

• Use: Gravel, Cyclocross
• Group: GRX
• Model: FC-RX820-2
• Gradation: 48/31T
• Q-Factor: 151mm
• Threaded BB shell width: 68 / 70mm
• Gear front: 2-speed 
• Gear rear: 12-speed
• Construction: Hollowtech II
• Compatible Chain: 12-speed HG
• PCD: 110/80mm
• Chain line: 47mm
• 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
• Chainrings: Aluminium Anodized

Colour

• Series colour

Weight

• Approx. 721g - 172.5mm

Contents

• 1 x Shimano GRX 2x12-speed Crankset FC-RX820 48/31T

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.