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Fitment notes and restrictions
Description
Center compatible wheels on the hub before the lug nuts are tightened
Race Star Industries 78-7030-1 is a four-piece hub-centric ring set for wheels with a 78.1 mm center bore and GM vehicle hubs measuring 70.3 mm. The rings fill the bore-to-hub gap during wheel installation, helping position the wheel concentrically before final lug-nut torque.
Key Features
- Four matching hub-centric rings
- 78.1 mm wheel-center inside diameter interface
- 70.3 mm vehicle-hub outside diameter interface
- Black plastic construction
- Dimension-based GM application
- Supports wheel centering during installation
- Does not change wheel offset, bolt pattern, or load rating
Fitment
| Application Type | Verified Requirements and Exclusions |
|---|---|
| Universal / dimension based | Requires a wheel with a 78.1 mm center bore and a GM vehicle hub measuring 70.3 mm. Confirm bolt pattern, wheel seat, offset, brake clearance, load rating, and hub dimensions separately. No year-make-model fitment applies. |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | 78-7030-1 |
| Product Type | Hub-centric ring set |
| Wheel Center Bore | 78.1 mm / 3.074 in |
| Vehicle Hub Diameter | 70.3 mm / 2.768 in |
| Material | Plastic |
| Color | Black |
| Application | GM, dimension dependent |
| Quantity | Set of four |
| UPC | 887753190031 |
| Manufacturer Shipping Weight | 0.50 lb |
| Manufacturer Package Dimensions | 9 x 9 x 4.5 in |
What's Included
- Four black 78.1-to-70.3 mm hub-centric rings
About Race Star Industries
Race Star Industries develops street and drag-racing wheels and matching installation accessories for late-model muscle and performance applications. Hub-ring selection is controlled by the measured wheel center bore and vehicle hub diameter, so the two dimensions must be confirmed before installation.
Related Parts
- No internal wheel, lug nut, stud, spacer, or socket is linked because each companion part must match the vehicle's bolt pattern, thread, seat, offset, brake clearance, and load requirements.
FAQ
What is the 78-7030-1?It is a set of four black plastic hub-centric rings sized for a 78.1 mm wheel center bore and a 70.3 mm GM vehicle hub.
Does this set fit every GM vehicle?No. The measured 70.3 mm hub diameter and 78.1 mm wheel center bore control compatibility, not the GM name alone.
How many rings are included?The verified package contains four matching rings.
What are the two ring dimensions?The wheel-side diameter is 78.1 mm and the vehicle-hub diameter is 70.3 mm.
What material are the rings?The exact set uses black plastic rings.
Do hub rings carry vehicle load?Wheel load is supported by the correctly mounted wheel, hub, studs or bolts, and properly torqued fasteners; these rings assist with centering during installation.
Will these rings correct the wrong bolt pattern or offset?No. They do not change bolt pattern, lug-seat style, offset, brake clearance, stud engagement, or wheel load rating.
What should be measured before ordering?Measure the wheel center bore and vehicle hub pilot, then verify every other wheel-mounting specification independently.
Installation Instructions
- Measure the wheel center bore and vehicle hub pilot to confirm 78.1 mm and 70.3 mm before opening the package.
- Verify the wheel bolt pattern, offset, lug-seat style, stud or bolt engagement, brake clearance, and load rating separately.
- Clean corrosion, dirt, and burrs from the hub pilot and wheel center bore without removing structural material.
- Seat one ring squarely in each compatible wheel bore and confirm it lies flat without cracking, binding, or excessive looseness.
- Mount the wheel by hand, start every lug fastener by hand, and tighten in the vehicle manufacturer's sequence with a calibrated torque wrench.
- Recheck wheel seating and fastener torque after the initial drive, and replace any ring that is distorted, cracked, loose, or heat damaged.
