The SHIMANO FC-RX610-2 balances weight savings with optimised efficiency for mixed terrain riding and racing. The gear ratio options meet the segmented demands of gravel cycling while maintaining the tighter gear ratios required to maintain your position in the field. The 2x12-speed crank uses a 46-30T chainring combination and is available in 165, 170, 172.5 and 175 mm crank arm lengths.