Wilwood Rear Sprint Gen II Hub and Six-Bolt Rotor Adapter Kit, Confirm Spline Count

A Gen II clamp hub and dynamic adapter provide the Sprint inboard rotor mounting arrangement. Wilwood's narrative and characteristics list disagree on axle spline count, so neither count is assumed to establish fitment. Wilwood Engineering designs and builds disc brake systems in Camarillo, California. Bill Wood established the company in 1977; it supplies brake rotors, calipers, master cylinders, valves, fittings and lines for specialized applications, street performance and motorsport. The complete brake system determines which individual components are appropriate.

Technical Details

• Manufacturer part number: 270-12635
• Material: Aluminum
• Finish: Type III Anodize
• Rotor mounting arrangement: Adapter-Dynamic
• Hub-to-adapter attachment: 3.37x2.28; this is not the wheel bolt circle
• Compatible rotor-adapter output interface(s): 6 x 5.50; match the actual adapter and rotor
• Related assembly part reference(s): 300-12581; check the kit contents and obtain any separately required parts
• Unresolved axle spline count: The product narrative states 46 teeth; its characteristics list states 48 splines. Confirm the exact supplied hub and axle.
• Package: One clamp-hub and rotor-adapter kit. Additional rotor T-nuts and bolts are required and are not included.
• Component: Sprint Inboard Hub Kit - Dynamic
• Position in the specified assembly: Rear

Fitment & Compatibility

For the specified rear inboard racing axle and matching rotor adapter. Confirm the spline count and profile, axle clamp engagement, rotor alignment and caliper clearance. This part mounts the brake rotor; it is not an outboard wheel hub.

Wilwood component specifications

For fitment assistance backed by more than 20 years of experience, share the installed brake configuration with PMB Performance before ordering.