Shimano GRX BR-RX810 Disc Flat Mount Rear Brake Caliper

Shimano GRX BR-RX810 Disc Flat Mount Caliper – Rear Engineered for performance over mixed terrain – be that tarmac; gravel or hard-packed mud; Shimano’s GRX BR-RX810 Disc Flat Mount Rear Brake Caliper quickly dissipates heat and clears dirt so you get consistent braking power. Setup is simple and ongoing maintenance a breeze thanks to a clean bleeding system so you’ll never hesitate to tackle the roughest surfaces.