Shimano GRX RX820-1 Crankset (Black) (1 x 12 Speed) (Hollowtech II) (165mm) (40T)

The Shimano GRX RX820 1x crankset here combines 165mm crankarms with an included 40T chainring for a 12-speed gravel drivetrain. Its listed chainline is 49.7mm, and the ring’s teeth are shaped for a 12-speed chain.

Hollowtech II uses a 24mm spindle on this model. The bottom bracket is supplied separately, so check the frame’s bottom-bracket standard alongside chainline and drivetrain requirements. Select this SKU for the 165mm/40T combination rather than assuming every RX820 crankset has the same dimensions.

WARNING : This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov