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Product details
The 1.25-inch-bore Narrow DynaPro offers a smaller piston-area option within this radial-mount thin-rotor series. Four stainless pistons are contained in a Type III anodized body, with a nominal rotor width of 0.25 inch. This caliper should be chosen to reproduce the intended hydraulic sizing as well as the mounting dimensions. Bill Wood founded Wilwood Engineering in 1977; the company is based in Camarillo, California. Wilwood designs and manufactures disc brake systems and components, from calipers and brake rotors to master cylinders, valves, fittings and brake lines, for motorsport, street-performance and specialized applications; selection depends on the complete brake system.
Technical Details
- Manufacturer part number: 120-18061
- Caliper type: Narrow Dynapro Radial Mount
- Construction: Billet 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: 0.25 inch
- Rotor thickness limits: 0.25–0.25 inches
- Rotor diameter limits: 10.75–12.19 inches
- Mounting style: Radial
- Handedness: Not restricted to one side; correct mounting and bleed orientation required
- Mounting centers: 4.75 inches
- Mounting-hole size: 0.39 inch
- Mount height: 1.61 inch
- Hydraulic inlet thread: M10 x 1.25
- Required pad shape: 7812
- Published pad area: 6.36 square inches
- Published pad volume: 2.1 cubic inches
- Manufacturer-listed component weight: 3.2 lb
Fitment & Compatibility
A 4.75-inch radial bolt pattern is only the first check. Compare rotor offset, 1.61-inch mount height, pad profile and the wheel’s available space. The M10 x 1.25 inlet requires the matching fitting, and the published 10.75–12.19-inch rotor diameter range does not establish direct fitment to a particular vehicle or hub.
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.
