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_7033450823725 Unless you're pulling these off

Unless you're pulling these off while in mid-air over a 40 foot double you'll most likely be able to put them in your pocket rather than leaving them lying around in the bush

and pricing may vary per region

Ready for track and trail

XX T-Type Eagle Transmission derailleur

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_7033450823725 Unless you're pulling these offThe 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.