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Product details
This Powerlite caliper is the anodized 1.25-inch-bore configuration for rotors 0.35–0.50 inch thick. Four stainless pistons work in a compact forged housing with radial mounting. The nominal 0.50-inch opening identifies rotor width, while the rotor diameter and pad sweep are separate selection dimensions. Founded in 1977 by Bill Wood, Wilwood Engineering is based in Camarillo, California. Its disc brake systems and components serve motorsport, street-performance and specialized applications. Calipers, brake rotors, master cylinders, valves, fittings and brake lines are among its products, selected according to the complete brake system’s requirements.
Technical Details
- Manufacturer part number: 120-8725
- Caliper type: Powerlite Radial Mount
- Construction: Forged Aluminium
- Finish: Type III Anodize
- Piston bores: 1.25 / 1.25 inches
- Piston type: Stainless
- Piston count: 4
- Published piston area: 2.46 square inches
- Dust boots: No
- Nominal rotor width: 0.50 inch
- Rotor thickness limits: 0.35–0.50 inches
- Rotor diameter limits: 9.45–11.00 inches
- Mounting style: Radial
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 5.08 inches
- Mounting-hole size: 0.40 inch
- Mount height: 1.56 inch
- Hydraulic inlet thread: 1/8-27 NPT
- Required pad shape: 7912
- Published pad area: 5 square inches
- Published pad volume: 1.8 cubic inches
- Manufacturer-listed component weight: 2.8 lb
Fitment & Compatibility
Check the bracket’s 5.08-inch centers, rotor centerline and the wheel barrel before assembly. A compatible diameter must also place the friction material fully on the rotor. Confirm the intended hydraulic piston area, pad type and inlet fitting against the brake package rather than relying on the general Powerlite family name.
For help identifying the correct brake component, provide the caliper markings and installation dimensions. PMB Performance has over 20 years of experience with parts and brake-system details.
