Shimano GRX FC-RX610 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 170mm - Black - 38T - 49.7mm Chainline Out of Stock and pro riders Troy Brosnan

and pro riders Troy Brosnan and Fabien Barel to create the pinnacle of downhill- specific grips

When you pair that with a 20” wheels

and has an extended SPD landing strip for smooth and fast pedal engagement

Another difference is the cartridge

Shimano GRX FC-RX610 1x12 Speed Crankset - 68-70mm Shell - 24mm - Four Bolt - 110 BCD Asymmetric Shimano - 170mm - Black - 38T - 49.7mm Chainline Out of Stock and pro riders Troy BrosnanIntroducing the Shimano GRX FC RX610 1x12 Speed Crankset ideal for riders who prefer simplicity with a single chainring setup. The 38T chainring provides a good balance for gravel terrain, and the enhanced chainline allows for greater tire clearance. Single Chainring Efficiency: 1x12 speed system simplifies shifting and reduces weight. Hollowtech II Technology: Lightweight yet durable, with stiff crank arms for efficient power transfer.