Shimano GRX C/SET RX610 40T single 12spd 172.5mm

Rigid arm construction helps maintain alignment under load, giving riders a direct feel during climbs and accelerations Crankset 12-Speed compatibility makes replacement planning easier for workshop builds, upgrades or routine drivetrain servicing Tooth configuration is tuned for smooth cadence changes, helping keep momentum across mixed terrain and varied riding speeds Durable finishing helps resist everyday wear, keeping the component suitable for regular road, gravel or MTB use 12-Speed drivetrain layout supports efficient power transfer, stable pedalling and dependable chain engagement, Manufacturer: SHIMANO

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 and 40T chainring, riders to choose closer gear steps or ultimate range depending on personal need. The FC-RX610-1 comes in 165, 170, 172.5, and 175mm crank arm lengths, adding an additional level of customization.