Shimano GRX FC-RX820 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 175mm - Black - 40T - 49.7mm Chainline Do Not Ship Internationally The Enduro Chain Guide takes

The Enduro Chain Guide takes the Trail Chainguide and adds lower chainring protection with a stabilised Polycarbonate bash guard

Waist Closure System: Zippered fly with push-button closure

and in the poorest of conditions and laugh in the face of the elements

These will fit either 12x142

Shimano GRX FC-RX820 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 175mm - Black - 40T - 49.7mm Chainline Do Not Ship Internationally The Enduro Chain Guide takesThe 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.