Multiple options for optimal gravel gear ratio for different requirements.
The SHIMANO FC-RX610 crank offers a balance between weight savings, optimized efficiency and a range of gear ratio options to meet the varying demands of riding in mixed terrain. By combining a 10-45Z or 10-51Z cassette with a 38Z or 40Z chainring, a tighter gear ratio or maximum range can be selected as desired. The FC-RX610-1 is available in 165, 170, 172.5 and 175mm crank arm lengths, providing another option for customization.
FEATURES
Optimal gear ratio for mixed terrain
Cassette options with 10-45Z and 10-51Z serve many different operating conditions
38Z and 40Z chainrings available
MODEL NUMBER FC-RX610-1
GRX 12-speed GROUP
Color Standard color
Average weight: 791 (38Z) 812 (40Z)
Rear gears: 12
Compatible chain: 12-speed HG
Chainline (mm): 49.7
Bolt circle diameter (mm): 110
Spider/chainring arms: 4
Chainring combination: 38Z
Q-factor (mm): 151
Crank arm length (mm): 175✔
Chain guard option: Without chain/ram guard✔.
2-PIECE CRANKSET: ✔
HOLLOWTECH crank: ✔
Compatible bottom bracket type: Outside✔
Recommended bottom bracket: Thread (normal)BB-RS501
Recommended bottom bracket: press fit BB-RS500-PB
Bottom bracket shell width with thread (mm): 68✔
Bottom bracket shell width with thread (mm): 70✔
Mounting bolt for crank included✔
