Wilwood Right Black GTB Rotor, 15.00 x 1.50-inch Heavy-Wall Spec-37

The 1.50-inch heavy-wall section is a major selection point on this right GTB rotor. A 15.00-inch Spec-37 ring with 60 curved vanes is attached through the larger 9.75-inch circle for the corresponding high-duty brake system. Founded by Bill Wood in 1977, Camarillo, California-based Wilwood Engineering designs and manufactures disc brake systems for motorsport, street-performance and specialized applications. Its calipers and brake rotors work alongside its master cylinders, valves, fittings and brake lines, with each individual component selected according to the complete system's requirements.

Technical Details

• Manufacturer part number: 160-13785-GTB
• Outside diameter / width: 15.00 inches diameter x 1.50 inches wide
• Material specification: Spec-37 Iron
• Friction surface / finish: GT Slotted; Black electrocoat
• Ventilation: 60 CV; curved
• Mounting direction: Right-hand
• Preparation: Balanced: yes; factory burnished: no
• Opposite-side component, ordered separately: 160-13786-GTB
• Rotor-to-hat/hub attachment circle: 12 x 9.75 inches
• Attachment hole size or thread: 0.326 inches
• Center registration: 9.03 inches
• Far-side inside diameter: 10.55 inches
• Approximate weight: 27.30 lb
• Quantity: one rotor ring; hat, hub, mounting hardware, calipers and pads are separate

Fitment & Compatibility

Select the separate hat for the 12 x 9.75-inch rotor-attachment pattern and 9.03-inch register. The 15.00-inch friction diameter and 1.50-inch section must agree with caliper placement and pad sweep. This mounting circle is independent of the vehicle's wheel-stud pattern. Select pads and operating duty to suit the rotor material and the intended brake system.

Manufacturer reference: Wilwood rotor specifications

Over 20 years of brake and parts experience support PMB Performance's fitment assistance. We can help assess the specified rotor against the hardware already on the vehicle.