Shimano GRX FC-RX820 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 172.5mm - Black - 42T - 49.7mm Chainline YGroup_7742238982189 Instant release

Instant release

collar-less design for more even clamping force distribution

0P Seat Post Clamp has added water-repellent functional parts to prevent mud and dust flow into the seat tube

but the optional T2 Pro XT Add-on can take this to 4 bikes (sold separately)

Shimano GRX FC-RX820 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 172.5mm - Black - 42T - 49.7mm Chainline YGroup_7742238982189 Instant releaseThe 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.