Wilwood Rear GTB Rotor and Parking Hat, Black 15.50 x 1.38-inch, Eight-Lug

This rear truck rotor uses a deep 2.92-inch hat and eight stud clearance holes around the 5.01-inch center. The black GT-slotted 15.50 x 1.38-inch ring includes the internal drum required by its matching parking-brake arrangement. Based in Camarillo, California, Wilwood Engineering was founded in 1977 by Bill Wood to design and manufacture disc brake systems and components. Its calipers, brake rotors, master cylinders, valves, fittings and brake lines serve motorsport, street-performance and specialized applications. Rotor selection is therefore a decision about the whole brake system and its mating parts.

Technical Details

• Manufacturer part number: 160-14563-GTB
• Rotor size: 15.50 inches diameter x 1.38 inches wide
• Rotor material: Iron
• Face and finish: GT Slotted; Black electrocoat
• Vanes: 48 vanes
• Mounting direction: Non-directional
• Factory condition: Factory burnished no; balanced no
• Hat wheel-stud clearance pattern: 8 x 6.69 inches
• Stud clearance-hole sizes: 0.64 inches
• Center / lug registration: 5.01 inches
• Far-side inside diameter: 11.05 inches
• Hat offset: 2.920 inches
• Internal parking-drum diameter: 9.06 inches
• Inside clearance diameter: 7.99 inches
• Hat mounting-face thickness: 0.31 inches
• Approximate component weight: 42.00 lb
• Quantity: one rotor with integral hat; separate hub, pads, calipers, mounting hardware and any parking-brake mechanism are not included

Fitment & Compatibility

Rear rotor for the corresponding eight-lug truck disc/drum system, including Wilwood kit 140-14559. Confirm the 8 x 6.69-inch stud clearances, 2.92-inch offset and 9.06-inch parking drum against that kit and the actual axle. Shoes, brackets and the hub are separate.

Manufacturer reference: Wilwood rotor specifications, Wilwood application information

With more than 20 years of parts and brake-system experience, PMB Performance can help review the rotor, hat and caliper combination before you order.