Wilwood Super Alloy Scalloped Racing Rotor, 11.75 x 0.81 Inches

A scalloped perimeter and Super Alloy construction bring this 11.75-inch rotor to a listed 5.00 lb. Its slotted 0.81-inch ring is intended for specific Sprint, Northeast dirt and pavement, and dirt late-model racing applications rather than general road use. Wilwood began in 1977 with founder Bill Wood and is based in Camarillo, California, where it designs and manufactures disc brake systems. Calipers and rotors sit alongside master cylinders, valves, fittings and lines in a range serving motorsport, street performance and specialized applications. Selecting these parts together is essential to a correctly matched brake installation.

Technical Details

• Manufacturer part number: 160-17781
• Quantity: One rotor; not an axle pair
• Outside diameter: 11.75 inches
• Nominal thickness: 0.81 inches
• Rotor material: Super Alloy
• Construction: 32 vanes
• Friction surface: Slotted
• Finish: Plain
• Approximate weight: 5.00 lb
• Factory burnished: No
• Dynamically balanced: No
• Installation orientation: Non-directional
• Rotor attachment pattern: 8 x 7.00 inches
• Rotor mounting hole / thread: 0.326 inches
• Registration / lug inside diameter: 6.38 inches
• Far-side inside diameter: 8.19 inches
• Intended use and restrictions: Not for street use. Designed for specific dirt and asphalt racing classes, including Sprint, Northeast Dirt and Pavement, and DLM; may be unsuitable for other forms of racing.

The hat or hub, fasteners, caliper and pads are not included.

Fitment & Compatibility

Not for street use. Confirm suitability for the exact racing class and brake package; Wilwood cautions that it may be unsuitable for other forms of racing. Match the eight-on-7.00-inch carrier connection.

Wilwood product specifications · Rotor dimension diagram

PMB Performance brings more than 20 years of brake expertise to component selection. Contact us with your existing rotor and brake-package details if you need help checking the match.