Shimano SLX SM-RT70-M Disc Brake Rotor - 180mm Center Lock Silver. Shimano SLX SM-RT70 center-lock disc brake rotor delivers powerful and consistent brake performance in all riding conditions.

3-layer structure with aluminum core and two stainless steel outer layers reduces rotor surface temperature approximately 100 degrees Celsius compared to all-steel rotors

Aluminum spider

Includes lock ring with external serration

Requires external-type rotor lock ring when installing onto 15/20mm axle hub