Wilwood Front Outer Bearing Cone, A1, 0.688-Inch Spindle Bore

This Wilwood A1 outer cone carries the tapered rollers in the hub's small-bearing arrangement. Its nominal 0.688-inch bore fits the spindle seat, while the separate matching cup establishes the running surface in the hub. 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: 370-1239
• Bearing Material: Steel
• Finish: Bare
• Nominal cone ID: 0.688 inch
• Reference bore: 0.6875 inch
• Set: A1
• Reference: LM11749
• Matching cup: 370-1238

Fitment & Compatibility

Pair with race 370-1238 and verify the spindle dimensions. Wilwood's dimensional sheet specifies a 0.6875-inch reference bore; use the correct bearing identification rather than rounded dimensions alone.

Manufacturer Documents

• Wilwood DS719 technical document
• Wilwood product information

Representative product-family image. Confirm the ordered bearing or kit using the part number and specifications.

Confirm the installation with PMB Performance when the existing configuration is unclear. We have more than 20 years of experience supporting careful parts selection and fitment checks.