Wilwood 1955–1957 Chevrolet passenger cars — Red Dynalite Front Hub Kit, 12.19-inch Plain

Red calipers and plain vented discs accompany the replacement Tri-Five front hubs. The Forged Dynalite front hub brake kit is supplied with red powder-coated 4-piston calipers and 12.19-inch plain-face rotors for 1955–1957 Chevrolet passenger cars. Since Bill Wood founded the company in 1977, Camarillo, California-based Wilwood Engineering has designed and manufactured disc brake systems for motorsport, street-performance and specialized applications. Its components include calipers, rotors, master cylinders, valves, fittings and brake lines; all must be matched to the intended brake system.

Package and installation requirements

• Included hubs offer 5 x 4.5 and 5 x 4.75-inch wheel bolt circles and 1/2-20 studs. Verify the intended wheel pattern and template clearance.
• The manufacturer specifies a +0.23-inch hub offset on each side. Account for that wheel-position change when checking tire, fender and suspension clearance on the Tri-Five Chevrolet.

Technical Details

• Manufacturer part number: 140-7676-R.
• Wheel-size guide: 15 in; 381 mm minimum nominal diameter; verify actual template clearance.
• Rotor dimensions: 12.19 in; 309.63 mm diameter x 0.81 in; 20.57 mm thick.
• Rotor construction: Iron; vented; Plain Face friction surface.
• Supplied hub wheel bolt circles: 5 x 4.5 in; 5 x 114.3 mm; 5 x 4.75 in; 5 x 120.65 mm.
• Included wheel stud thread: 1/2-20.
• Sold as one kit. Mounting hardware is included. Replacement hubs are included.
• Brake pads are included; use the compound and installation instructions specified for this rotor package.
• Spindles, master cylinder, brake booster and hydraulic brake lines are not included.
• Calipers: 4 pistons; forged aluminum; stainless steel pistons.
• Caliper attachment: lug mount; 1/8-27 NPT hydraulic inlet.
• Caliper finish: Red Powder Coat.

Fitment & Compatibility

The Tri-Five Chevrolet application list covers Bel Air, Nomad, One-Fifty, Two-Ten and Sedan Delivery from 1955–1957, together with the listed 1957 Del Ray. Verify the original spindle before selecting the hub kit, especially on a car that has already received a disc conversion or suspension change. New hubs supply two wheel bolt-circle options and 1/2-20 studs; check that the intended wheels match the selected pattern. DS449 describes the bearing and hub assembly sequence and provides the clearance profile for the 12.19-inch rotor. The kit changes the hub and braking hardware but does not include replacement spindles, a booster or a master cylinder. Review those existing components as part of the finished conversion rather than treating the new calipers as a complete hydraulic system.

Confirm the exact model and equipment combination in the table below, then follow its numbered installation notes.

Manufacturer references

• Wilwood product and configuration information
• Installation instructions

Bring your vehicle and brake-system questions to PMB Performance. With over 20 years of experience, we can help identify the measurements and installation details that determine the correct kit.

WARNING: This product can expose you to chemicals including Arsenic, Cadmium, Chromium (Hexavalent compounds), Lead, Nickel, Cobalt and Antimony Trioxide which are known to the State of California to cause cancer or other reproductive harm. For more information go to www.p65warnings.ca.gov.

Vehicle Applications

Application Notes

1. Kit may fit some 15" wheels. Check wheel clearance diagram in kit installation instructions before purchase.
2. This kit supplies front service-brake components. No parking-brake mechanism or parking-brake cables are included; verify the vehicle's separate rear parking-brake system.
3. Line kit included (manufacturer): None
4. Front line-kit reference: 220-7699