Shimano ultegra rt800 ice tech freeza cl rotorthe ultegra rt800 ice tech freeza cl rotor proves that shimano is dedicated to advancing the ultegra range made from a hybrid of steel and aluminium the lightweight reliable and durable shimano ultegra rt800 ice tech freeza cl rotor superbly manages the build up of heat as you ride ride faster brake laterthe ice tech freeza design provides constant braking performance through better energy control the ice tech freeza pads allow the surface temp