Rotor Adapter Reg. Ring

The Rotor Adapter Reg. Ring from Wilwood is a precision-engineered brake component designed to maintain proper rotor concentricity and alignment in high-performance braking systems. This adapter ring serves as a critical interface between rotor hubs and mounting surfaces, ensuring consistent pad-to-rotor contact geometry across the entire friction surface. Whether you're upgrading a street performance vehicle, building a track-focused suspension, or maintaining a heavy-duty braking application, this precision adapter is engineered to prevent runout and deliver reliable stopping power under demanding conditions.

Manufactured to Wilwood's exacting OEM specifications, the Rotor Adapter Reg. Ring features precision-machined construction that guarantees tight tolerances and repeatable fitment across multiple vehicles and brake configurations. The compact design measures an outer diameter of 4.05 inches with a thickness of 0.25 inches, integrating seamlessly into existing brake assemblies without requiring extensive modification or clearance work. At just 0.03 pounds, this lightweight component adds virtually no unsprung mass while providing the structural rigidity necessary to maintain rotor true-running under heavy braking forces, cornering loads, and thermal cycling that occurs during spirited driving or competition.

Mechanics and performance enthusiasts benefit most from this adapter when installing oversized or custom rotors on upgraded Wilwood brake kits, or when re-centering worn rotors to ensure optimal performance. This product is ideal for those looking to enhance their braking systems with reliable components that meet high-performance standards. The Rotor Adapter Reg. Ring is compatible with various Wilwood brake systems and upgrades, making it a versatile choice for automotive applications.