Shimano GRX FC-RX820 2x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110-80 BCD Asymmetric Shimano - 175mm - Black - 48-31T - 47mm Chainline YGroup_7034235289645 heat treated and polished high

heat treated and polished high carbon steel are replaceable if they ever wear out

0 tyres and works with any tubeless valve

If you can't get a seal you can use the 20G CO2 canister to blast the stubborn bead into submission

UV detectable

Shimano GRX FC-RX820 2x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110-80 BCD Asymmetric Shimano - 175mm - Black - 48-31T - 47mm Chainline YGroup_7034235289645 heat treated and polished highThe SHIMANO FC RX820 2 balances weight savings and optimal efficiency for mixed terrain riding and racing. Double chainring gearing caters to the segmented demands of gravel cycling, maintaining the tighter gear steps needed to maintain your position in the bunch. The 2x12 speed crank utilizes a 48 31T chainring and comes in 170, 172. 5, and 175 mm crank arm lengths.