Shimano Saint SM-RT99-M Disc Brake Rotor

Saint SM-RT99 Center Lock rotors utilize Freeza technology: a 3-layer structure with an aluminum core and stainless steel outer layers plus aluminum cooling fins that reduce rotor surface temperatures approximately 150 degrees Celsius compared to all-steel rotors.

- Aluminum spider
- Includes standard type rotor lockring
- Requires external-type rotor lockring when installing onto 15/20mm hub (sold separately)