Shimano GRX FC-RX820 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 170mm - Black - 40T - 49.7mm Chainline Images Uploaded - Ready for Review The DH Lower Chain Guide

The DH Lower Chain Guide provides you with the lower mounting plate

Helmet carry: This pack cannot carry a helmet

Install and remove 12-notch external bearing bottom brackets

Clutch controls chain tension for consistent shifting

Ride with confidence over bumps and jumps knowing your phone isn't going anywhere

Shimano GRX FC-RX820 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 170mm - Black - 40T - 49.7mm Chainline Images Uploaded - Ready for Review The DH Lower Chain GuideThe SHIMANO FC RX820 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 40T and 42T chainrings, riders can choose closer gear steps or ultimate range. The FC RX820 1 comes in 170, 172. 5, and 175 mm crank arm lengths, providing an additional level of customization.