The Alcon Pro-System 11.75 x 1.25 inch rotor is supplied as a left-side replacement built to the listed diameter and thickness. Offered as a direct-replacement rotor, it maintains the correct mounting and size so brake pads seat correctly and braking function remains consistent with the original equipment specifications for that left rotor size.
Alcon Pro-System 11.75 x 1.25in Rotor - Left