Fitment questions?
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Product details
A 9-inch drum-brake spindle requires this specific Wilwood A-Body front hub when building the corresponding solid-rotor conversion. Its spindle fit differs from the hub intended for 10-inch drums, despite sharing the same two five-lug wheel bolt circles. For Wilwood Engineering's motorsport, street-performance, and specialized applications, component selection follows the requirements of the complete brake system. The company was founded by Bill Wood in 1977 and is based in Camarillo, California, where its business focuses on designing and manufacturing disc brake systems, calipers, rotors, master cylinders, valves, fittings, and lines.
Technical Details
- Manufacturer part number: 270-8773
- Material: Aluminum
- Finish: Bare
- Position: Front
- Wheel bolt pattern: 5 x 4.75 in; 5 x 4.50 in
- Wheel stud thread: 1/2-20
- Weight: 3.3 lb
- Inner bearing specification: 370-3147 / A4 set (fitment reference)
- Outer bearing specification: 370-1239 / A1 set (fitment reference)
- Documented solid-rotor arrangement: 0.35-inch solid rotor, mounted directly or with adapter 300-3307 as specified in DS-719
Fitment & Compatibility
Identify the 9-inch drum spindle on the specified 1965–1972 Mopar A-Body application before ordering. Check its A4 inner/A1 outer bearings and the solid-rotor kit drawing. Do not substitute the 10-inch drum-spindle hub by wheel pattern alone.
Manufacturer Documents
The photograph represents the product family. Match the ordered configuration using the part number and specifications above.
PMB Performance has over 20 years of experience helping customers select brake-system parts. Share the existing assembly information so we can help you check the details before ordering.
