Shimano GRX FC-RX820 48-31T 172.5mm Crankset

Optimal gearing for spirited group rides and aggressive racing

The SHIMANO FC-RX820-2 balances weight savings and optimal efficiency for mixed-terrain riding and racing. Double chainring gearing caters to the segmented demands of gravel cycling, maintaining the tighter gear steps needed to maintain your position in the bunch. The 2x12-speed crank utilizes a 48-31T chainring and comes in 170, 172.5, and 175 mm crank arm lengths.

Features

• Smaller gear steps for cadence control on mixed-terrain riding
• Gravel-optimized gear ratios preserve riding rhythm on rough surfaces
• Wider gear range
• 17T range covers array of riding conditions
• Gear combination: 48-31T
• Hollowtech crank arm

Technical Specifications

• MODEL NO: FC-RX820-2
• SERIES: GRX 12-speed
• Average weight: 710
• Rear speeds: 12
• Compatible chain: HG 12-speed
• Chain line (mm): 47
• P.C.D. (mm): 110/80
• Spider/gear arms: 4
• Chainring combination: 48-31T
• Q-factor (mm): 151
• Crank arm length (mm): 172.5
• Recommended bottom bracket|Threaded (normal): SM-BBR60
• Recommended bottom bracket|Press-Fit: SM-BB72
• Threaded bottom bracket shell width (mm): 68/70