Shimano RT-CL900 Ice Tech Freeza Disc Brake RotorSpecifically designed for gravel adventure riding, this hydraulic disc brake rotor offers excellent heat dissipation, consistent braking and quieter operation. It features an Ice Technologies Freeza three-layer rotor construction that's equipped with stainless steel on its outer surface and aluminium on the inside for superior braking and a low weight. Coming complete with heat dissipation paint finish, this model also offers greater longevity, so you can benefit from high level braking performance for longer.Proprietary 3-Layer ConstructionAn extra layer of heat protection, Ice Technologies Freeza rotor construction uses a proprietary three-layer sandwich design with an exposed radiator fin. Together with the heat-dissipating paint, Freeza rotors deliver supercooling forces for even more reliable braking performance and lighter operation under all conditions. Ice Technologies Freeza rotors provide consistent braking performance with longer pad life, less brake fade and noise.Centre Lock SystemThe Centre Lock System makes an easy rotor installation possible with a spline mount and a lock ring. The lock ring mounting system reduces the total working hours by shortening the amount of time of both installation and de-installation. In addition, the secure fixing by the spline mount enhances precision and rigidity while improving braking efficiency.Features: Rotor Material: Stainless Steel and Aluminium Lockring Material: Aluminium Finish: Heat dissipation paint Use: Road, Gravel Brake Type: Hydraulic Disc Brake Mount Type: Centre Lock Pad Compatibility: Metal / Resin Technologies: Ice Technologies Freeza 140 degrees C Overall Heat Reduction 10% longer pad life (When compared to stainless steel rotors) Weight: 140mm Option: 96g; 160mm Option: 114gManufacturer's Part Numbers: RTCL900SI Black 160mm RTCL900SSI Black 140mmA 2-year warranty is offered with all Shimano products from Chain Reaction Cycles (3 years on Dura-Ace and XTR products).Buy Shimano Components from Chain Reaction Cycles, the World's Largest Online Bike Store.