Fitment questions?
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Product details
A red billet aluminum body carries four stainless pistons in this right-front GP310. The caliper belongs to Wilwood’s 2000–2007 Harley-Davidson front range and has a 2.72-inch fork-leg mounting pattern. Its nominal 0.25-inch rotor opening must be checked with the bike’s rotor and pad position. Based in Camarillo, California, Wilwood Engineering was founded by Bill Wood in 1977. The manufacturer produces disc brake systems and components for motorsport, street-performance and specialized applications, with a range covering calipers, brake rotors, master cylinders, valves, fittings and brake lines. Individual components are chosen to suit the complete brake system.
Technical Details
- Manufacturer part number: 120-7738-RD
- Caliper type: GP310 Motorcycle Front (2000-2007)
- Construction: Billet Aluminium
- Finish: Red Powder Coat
- 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: 0.25 inch
- Rotor thickness limits: 0.18–0.25 inches
- Rotor diameter limits: 11.00–11.50 inches
- Mounting style: Lug
- Mounting side: Right Hand
- Mounting centers: 2.72 inches
- Mount height: 2.18 inch
- Hydraulic inlet thread: M10 x 1.50
- Required pad shape: 6208
- Published pad area: 3.65 square inches
- Published pad volume: 0.63 cubic inches
- Manufacturer-listed component weight: 2.1 lb
- Supplied brake components: Individual GP310 caliper with brake pads
Fitment & Compatibility
Use the actual fork, rotor and hose arrangement to confirm fitment; Springer and four-speed FL models are excluded. The exact part lists an M10 x 1.50 inlet and 11.00–11.50-inch rotor diameter limits. Check wheel-spoke clearance and the correct brake-fluid requirements before installing or replacing the caliper.
PMB Performance brings over 20 years of brake and parts experience to selection questions. Send the existing caliper reference and brake-package details for help checking compatibility.
Brake-pad warning: Cancer and Reproductive Harm. www.P65Warnings.ca.gov. This warning applies to the brake pads.
