Shimano FC-RX810-2 GRX Crank

The RX810 series cranks will be offered in 1x11 and 2x11 options. The single front chainring cranks will come with a 40 or 42-tooth chainring, while the double will come with 48-31 gearing. The double crank has a 17t jump between the two rings, which is the largest Shimano has ever produced. Both cranks are offered in 170, 172.5, and 175mm lengths and both can be converted from a single chainring to a double arrangement