The Shimano RT-CL800 rotors are high-end components within the Shimano Ultegra R8100 and Shimano GRX groupsets. These rotors have been specifically designed with improved heat dissipation in mind, resulting in a significant reduction in heat build-up and less chance of rotor distortion. This has been achieved through a modified material combination, allowing the rotors to perform better under heavy conditions and provide consistent braking power and control. In addition, the spider design has been kept open so that wind forces have less influence, contributing to the overall aerodynamics.

The Shimano RT-CL800 rotors come with an internal lockring as standard, making installation simple and safe.