The Shimano GRX BR-RX820 Brake Caliper (Front or Rear) is a high-performance hydraulic disc brake caliper engineered for gravel riders seeking strong, consistent stopping power across varied terrain. Part of the Shimano GRX 800 series, this caliper delivers controlled braking performance and refined modulation whether mounted on the front or rear of your gravel bike. Its flat-mount design integrates cleanly with modern gravel frames and forks that adhere to current disc standards.

Designed with Shimano’s proven hydraulic system, the BR-RX820 caliper provides powerful braking with smooth lever feel that inspires confidence on loose gravel, steep descents, and technical terrain. Precision-engineered pistons and seals enhance responsiveness and long-term durability, helping maintain reliable performance in dusty, muddy, or wet conditions. Even pad contact and optimized heat distribution contribute to consistent braking without premature wear or fade.

Installation is straightforward with flat-mount compatibility and clean hose routing that preserves your bike’s aesthetics and functionality. The GRX BR-RX820 works seamlessly with Shimano GRX brake levers and 2-piece rotors, giving you a complete hydraulic braking system tuned for gravel-specific demands. Whether it’s stopping at the bottom of a long descent or managing speed through tight corners, this caliper delivers dependable braking performance front or rear.