Wilwood Front Brake Kit for Chevrolet Tri-Five ProSpindle Cars (1955–1957) with Black Dynapro Radial Calipers and 12.19-Inch Plain Rotors

This Narrow Dynapro Radial front brake conversion combines four-piston calipers, 12.19-inch rotor rings, separate hats and replacement aluminum hubs. It is built around the Wilwood two-inch-drop ProSpindle interface. Black calipers and 12.19-inch plain face rotors are the selected configuration. Founded by Bill Wood in 1977 and based in Camarillo, California, Wilwood Engineering designs and manufactures disc brake systems and components for motorsport, street-performance and specialized applications. Its range includes calipers, brake rotors, master cylinders, valves, fittings and brake lines, chosen to match the complete system.

Technical Details

• Manufacturer identification: 140-16907, supplied as one application-specific kit.
• Rotor dimensions (diameter/width): 12.19 / 0.81 inches. Plain Face design in Iron.
• Pads supplied: BP-10. Piston bore dimensions: 1.75, 1.75 inches.
• Wheel hubs are part of this package: aluminum construction, 5 x 4.50, 5 x 4.75-inch patterns and 1/2-20 wheel studs; bearings and seals are included.
• A 15-inch nominal wheel is the starting point. Its spoke and barrel shape must clear the actual brake assembly.
• Mounting hardware and brake pads come with the kit. Spindles, a master cylinder and a brake booster are not included.
• Service caliper specification: Dynapro Radial Mount in black powder coat, using radial mounting and 4 stainless pistons.
• Hat material/finish: aluminum / black e-coat. Published hat offset: 1.430 inch.
• The specified caliper hydraulic connection is 1/8-27 NPT.
• This package excludes flexible brake hoses. Select the documented caliper and chassis-end connections separately.

Fitment & Compatibility

Wilwood ProSpindle 831-16660 is the required front spindle and is sold separately. This Dynapro assembly places new hubs and 12.19-inch rotor/hat units on that spindle, with a published 0.34-inch outward track change per side. Use the original steering arms and their specified hardware. The vehicle rows cover 1955–1957 Bel Air, Nomad, One-Fifty, Sedan Delivery and Two-Ten, with Del Ray listed for 1957. Check the hub wheel pattern, hose selection and 15-inch wheel envelope. Use the complete application table below to check the individual year, model, submodel, original brake configuration and attached notes.

PMB Performance brings 20+ years of parts and fitment experience to brake selection. Send the actual hub or spindle details, existing brake configuration and wheel measurements for help checking this combination.

Manufacturer documentation: Installation instructions.

Manufacturer Warning

Applicable to brake pads only: Wilwood warns of exposure to arsenic, cadmium, hexavalent chromium compounds, lead, nickel, cobalt and antimony trioxide, chemicals known to California to cause cancer or reproductive harm. More information:

P65Warnings.ca.gov.