As cold as ice.
Featuring a new Ice-Tech FREEZA design, these Ultegra RT-800 Center Lock Disc Rotors are designed to provide superior heat management for serious road cycling with disc brakes. Whether you're out for a white-knuckle descent or an ultra-distance ride through the hills, these rotors hybrid steel and aluminum construction rapidly dissipate heat for a 50ºC cooler rotor surface.
The Shimano Ultegra SM-RT800 Disc Rotors are Centerlock compatible. Available in two sizes: 140mm and 160mm.