This Shimano RT-CL800 is the silver 180mm Centerlock disc rotor for compatible Ultegra and GRX brake setups. ICE Technologies FREEZA construction is intended to manage heat during braking.
The 180mm size is listed with an externally splined lockring and compatibility with all pad compounds. Check the frame or fork’s permitted rotor diameter, caliper adapter and hub interface before fitting. The 140mm and 160mm weights do not apply to this rotor.







