Wilwood Small Ford Bronco 2.36-inch-offset rear parking-brake parts layout with red Superlite 4R calipers, 12.88-inch drilled-and-slotted rotors, internal drum parking-brake assemblies, pads and mounting hardware
Wilwood Small Ford Bronco 2.36-inch-offset rear parking-brake single-side assembly showing a red Superlite 4R caliper beside a 12.88-inch drilled-and-slotted rotor
Wilwood Small Ford Bronco 2.36-inch-offset rear parking-brake parts layout with red Superlite 4R calipers, 12.88-inch drilled-and-slotted rotors, internal drum parking-brake assemblies, pads and mounting hardware
Wilwood Small Ford Bronco 2.36-inch-offset rear parking-brake single-side assembly showing a red Superlite 4R caliper beside a 12.88-inch drilled-and-slotted rotor

Wilwood Red Rear Superlite 4R Parking Brake Package, 12.88-Inch SRP Rotors for Small Ford Bronco Axle Ends

SKU: 140-13321-DR

$2,299.11 Sale
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Product details

Red radial-mount calipers operate on drilled-and-slotted 12.88-inch rotors in this Small Ford Bronco rear package. The parking-brake assembly sits within the hats and must connect to suitable separate cables. Founded by Bill Wood in 1977, Wilwood Engineering designs and manufactures disc brake systems from Camarillo, California. Its calipers, brake rotors, master cylinders, valves, fittings and brake lines serve motorsport, street-performance and specialized applications. Individual components must be selected for the complete brake system.

Technical Details

  • Manufacturer part number: 140-13321-DR
  • Application and package: Rear Brake Kits - Street Performance; Rear Kits; Disc; Parking; Sold as a kit.
  • Rear axle-end interface: Small Ford Bronco; axle/flange offset 2.36 in; 59.94 mm
  • Included mechanical components: Mounting hardware: Yes; hub(s): No; spindle(s): No
  • Hydraulic components supplied: Master cylinder: No; brake booster: No; brake lines: No
  • Specified pad compound: BP-10
  • Separate rotor-hat specification: Iron; Black E-Coat; offset 1.540 inch; part 170-13326
  • Rotor dimensions: 12.88 in; 327.15 mm outside diameter; 1.10 in; 27.94 mm thickness
  • Rotor construction: Spec-37 Iron; Vented; SRP Drilled & Slotted
  • Caliper assembly: Forged Narrow Superlite 4R; 4 pistons per caliper; Forged Aluminium body; Radial mount
  • Piston and finish specification: Stainless pistons; Red calipers; Red Powder Coat
  • Hydraulic inlet: 1/8-27 NPT
  • Wheel bolt pattern(s): 5 x 5.5 in; 5 x 139.7 mm
  • Stud-hole / clearance provision: 0.640 in; 16.26 mm; diameter provision, not a thread designation
  • Wheel diameter starting requirement: 17 in; 431.8 mm; verify the individual wheel against the installation drawing

Fitment & Compatibility

Use the housing-end drawing and 2.36-inch offset to identify the axle configuration. Check DS1016 for rotor-register and wheel clearance, then select the required flexible brake lines.

A maximum flange diameter of 6.61 inches and a 0.050-inch x 45-degree chamfer are specified for rotor clearance. The illustrated register is 2.88 inches; select the documented centering arrangement and match both axle offset and housing-end bolt pattern.

The installation reference identifies Small Ford Bronco rear applications with 2700-lb axle/10-inch drums for 1966–1973 and 2900-lb axle/10-inch drums for 1974–1975. The measured2.36-inch offset and actual housing flange still govern selection.

Hydraulic hoses/fittings and parking-brake cables, adapters and cable hardware are not included. Choose a compatible cable arrangement for the internal parking brake; universal cable systems may require vehicle or cable modifications.

Manufacturer References

PMB Performance has over 20 years of brake-parts experience. Send the installed component details if you need help checking this replacement.