Shimano GRX C/SET RX820 40T single 12spd 170mm

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 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, Weight: 2.20462262 Pounds, Manufacturer: SHIMANO