Fitment questions?
Call (855) 786-7101 or text (801) 304-3141. We check fitment by VIN.
Product details
The chrome left-front GP310 is the 2000–2007 Harley-Davidson version of this four-piston motorcycle caliper. It uses a 2.72-inch mounting pattern and an M10 x 1.50 inlet in a billet aluminum body. Stainless pistons and the selected rotor opening define its hydraulic and dimensional configuration. Wilwood Engineering was founded by Bill Wood in 1977 and is based in Camarillo, California. The company makes disc brake systems and components for motorsport, street-performance and specialized uses, including calipers, brake rotors, master cylinders, valves, fittings and brake lines; each component must match the requirements of the complete brake system.
Technical Details
- Manufacturer part number: 120-7739
- Caliper type: GP310 Motorcycle Front (2000-2007)
- Construction: Billet Aluminium
- Finish: Chrome
- 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: Left 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: 2.0 lb
- Supplied brake components: Individual GP310 caliper with brake pads
Fitment & Compatibility
Check the left fork mount and rotor package against the exact caliper specifications. Springer and four-speed FL layouts are excluded from the published front application. Modified forks, hubs or wheels need independent clearance and offset checks, and the chosen fluid must satisfy the motorcycle’s full brake-system requirements.
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.
Brake-pad warning: Cancer and Reproductive Harm. www.P65Warnings.ca.gov. This warning applies to the brake pads.
