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