Shimano Ultegra RT800 centerlock disc rotors.

- Aluminum spider
- Includes standard type rotor lockring
- Freeza technology, 3-layer structure with aluminum core and stainless steel outer layers and additional aluminum cooling fins reduces rotor surface temperature approximately 150 degrees Celsius compared to all-steel rotors
- Requires external-type rotor lockring when installing onto 15/20mm axle hub
- Hub/Disc Compatibility: Center-Lock Disc
- Pad Compatibility: All Pad Compounds
- Rotor Type: Two Piece