Wilwood rotor/hat register rings, 2.78-inch diameter, are supplied as a two-pack to provide accurate centering when fitting rotors to hats or hubs. Proper register rings improve rotor concentricity and running clearance, which helps avoid vibration and uneven pad wear. Use these rings when adapting aftermarket rotors to hubs with different register sizes to ensure consistent brake operation.

Wilwood Adapter Rotor/Hat Register Ring 2.78in Dia. - 2 Pack