Shimano GRX FC-RX610 38T 172.5mm Crankset

Array of options delivers optimal gravel gearing for variety of riders

The SHIMANO FC-RX610-1 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 38T or 40T chainring, riders can choose closer gear steps or ultimate range depending on personal need. The FC-RX610-1 comes in 165, 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
• 38T and 40T chainrings available

Technical Specifications

• MODEL NO: FC-RX610-1
• SERIES: GRX 12-speed
• Average weight: 791 (38T) 812 (40T)
• Rear speeds: 12
• Compatible chain: HG 12-speed
• Chain line (mm): 49.7
• P.C.D. (mm): 110
• Spider/gear arms: 4
• Chainring combination: 38T
• Q-factor (mm): 151
• Crank arm length (mm): 172.5
• Recommended bottom bracket|Threaded (normal): BB-RS501
• Recommended bottom bracket|Press-Fit: BB-RS500-PB
• Threaded bottom bracket shell width (mm): 68/70