Measuring bump steer is an absolute necessity for dialing in the handling of a race car. Typically, a bump steer gauge plate bolts directly to the hub using the tapped holes meant for the dust cover. However, many high-end racing hubs—such as Wilwood Starlite or specific Wide-5 setups—are machined perfectly smooth and lack these mounting holes, making it impossible to attach standard setup tools.
The Longacre 79121 Hub Mounting Stand-Offs are the purpose-built workaround. Designed as a "snap-in" retrofit kit, these billet aluminum stand-offs either thread directly onto massive 5/8" coarse racing wheel studs or snap into the center cap area (depending on the exact hub configuration). They create a rock-solid, perfectly parallel mounting foundation for the bump steer plate, allowing chassis builders to get dead-accurate suspension geometry readings without having to modify their expensive hubs.
Key Features
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The Hub Solution: Specifically engineered to allow the use of standard bump steer gauges on high-performance racing hubs (like Wilwood) that do not feature traditional dust cap bolt holes.
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5/8" Stud Compatible: Designed to thread directly onto the thick 5/8"-11 wheel studs common in circle track and dirt late model racing, providing a secure, no-slip grip during measurement.
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Precision Alignment: Ensures the bump steer plate is held perfectly parallel to the face of the hub. Even a millimeter of flex or misalignment would ruin the geometry readings, and these stand-offs prevent that entirely.
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Billet Aluminum Construction: CNC-machined from lightweight, high-grade billet aluminum to provide a rigid, professional-grade mounting surface that will survive years of use in a busy chassis shop.
