Shimano GRX FC-RX820 40T 172.5mm Crankset

Wide array of options delivers optimal gravel gearing for variety of riders

The SHIMANO FC-RX820-1 crank balances weight savings, optimized efficiency and an array of gearing options that cater to the segmented demands of mixed-terrain riding. By pairing a 10-45T or 10-51T cassette with 40T and 42T chainrings, riders can choose closer gear steps or ultimate range. The FC-RX820-1 comes in 170, 172.5, and 175 mm crank arm lengths, providing an additional level of customization.

Features

• Optimal gearing for mixed-terrain riding
• 10-45T and 10-51T cassette options serve array of riding styles
• 42T and 40T chainrings available

Technical Specifications

• MODEL NO: FC-RX820-1
• SERIES: GRX 12-speed
• Average weight: 656 (42T)
• Rear speeds: 12
• Compatible chain: HG 12-speed
• Chain line (mm): 49.7
• P.C.D. (mm): 110
• Spider/gear arms: 4
• Chainring combination: 42T
• 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