Shimano XTR SM-RT99 Freeza Center Lock Rotor - 140mm/160mm - 140MM

Shimano Saint/XTR RT99 Centerlock Disc Rotors Freeza technology, 3-layer structure with aluminum core and stainless steel outer layers and addtional aluminum cooling fins reduces rotor surface temperature approximately 150 degrees Celsius compared to all-steel rotors. Requires SM-HB20 external-type rotor lockring when installing onto 15/20mm axle hub, see BR8088. Includes standard type rotor lockring. Hub/Disc Compatibility: Center-Lock Disc. Rotor Size: 140.