For a wheel with a 66.6 mm center bore and a vehicle hub with a 57.1 mm hub pilot, the nominal hub-centric ring size is 66.6 mm outer diameter × 57.1 mm inner diameter. The ring’s outside fits the wheel; its inside fits over the vehicle hub. Check that both measurements match the wheel and vehicle specifications before ordering.
Confirm the wheel center bore: 66.6 mm
The wheel center bore is the diameter of the opening at the back of the wheel that fits over the vehicle hub. In this example, the wheel bore must be 66.6 mm for a ring with a 66.6 mm outside diameter to seat correctly.
Confirm the bore from the wheel manufacturer’s specifications, the wheel documentation, or a careful measurement. Do not assume the bore from the vehicle’s make, model, or bolt pattern: aftermarket wheels may have different center bores, even when intended for the same vehicle.
A ring that is too large on the outside will not seat in the wheel bore. One that is too small may leave a gap, so it cannot properly center the wheel on the ring.
Confirm the vehicle hub pilot: 57.1 mm
The vehicle hub pilot is the raised cylindrical section that projects from the hub and locates the wheel. For this fitment, its nominal diameter is 57.1 mm. The ring’s inside diameter must fit over that pilot.
Check the hub measurement against reliable vehicle or hub specifications. If measuring directly, use clean, undamaged surfaces and suitable measuring tools; corrosion or debris can affect a reading. Do not substitute a wheel bolt pattern or lug-seat measurement for the hub-pilot diameter.
Read the size in the correct direction
Hub-centric rings are commonly described by the wheel-bore diameter first and the vehicle-hub diameter second:
Ring outer diameter (OD) × inner diameter (ID) = wheel bore × vehicle hub
For this example:
| Measurement | Fits | Nominal size |
|---|---|---|
| Ring outside diameter (OD) | Wheel center bore | 66.6 mm |
| Ring inside diameter (ID) | Vehicle hub pilot | 57.1 mm |
So, 66.6 → 57.1 means 66.6 mm OD × 57.1 mm ID. Some sellers may format sizes differently, so verify the listed OD and ID rather than relying on the order of the numbers alone.
The ring bridges the clearance between a larger wheel center bore and a smaller vehicle hub pilot. It helps locate the wheel concentrically during installation. It does not change the bolt pattern, wheel offset, brake clearance, load rating, or lug-seat compatibility, and it cannot make an otherwise incompatible wheel fit.
Check tolerance, profile, and material
The stated dimensions are nominal. A suitable ring should fit securely: the OD should seat in the wheel bore, and the ID should fit over the hub pilot without excessive looseness or force. Manufacturing tolerances and the shapes of the wheel bore and hub can affect the actual fit.
Before buying, confirm:
- OD and ID: 66.6 mm OD and 57.1 mm ID, with both dimensions clearly identified.
- Fit profile: The ring’s shape and any chamfers or shoulders must suit the wheel bore and hub. A ring with the right diameters may still not seat correctly if its profile interferes with a chamfer, lip, or other feature.
- Axial depth: The ring must sit fully in place without preventing the wheel from seating flat against the hub.
- Material: Rings may be made from materials such as plastic or aluminum. Consider the manufacturer’s stated temperature and use suitability, as well as how the material will behave in the conditions where the vehicle is used. Do not assume material alone guarantees fit or durability.
- Construction: A split, stepped, or flanged design may fit differently from a simple cylindrical ring. Match the design to the wheel and hub rather than choosing by diameter alone.
If the bore, hub, or ring dimensions are uncertain, pause and verify them with the wheel or vehicle manufacturer or a qualified wheel professional.
Installation and corrosion checks
Before fitting, remove dirt, loose rust, and corrosion from the wheel bore and hub pilot. The mating surfaces should be clean and free of damage. Check the ring for cracks, deformation, burrs, or wear.
Fit the ring in the orientation specified by its manufacturer. Depending on the design, it may seat in the wheel bore or on the hub. It should sit evenly and should not require hammering or excessive force. Do not stack rings or use a ring to cover a damaged or badly corroded hub.
After placing the wheel on the hub, confirm that it sits flush against the mounting surface. The ring must not hold the wheel away from the hub or interfere with the lug nuts, wheel bolts, or their seats. Tighten the fasteners using the vehicle or wheel manufacturer’s specified procedure and torque. Follow their guidance on any post-installation torque check.
In areas exposed to water or road salt, inspect the hub and ring during routine wheel service. Corrosion can make removal difficult or affect seating. If a ring is stuck, damaged, or no longer fits correctly, address the cause before reinstalling the wheel; do not force the wheel into place.
Product-selection checklist
Before ordering a hub-centric ring for this combination, confirm:
- Wheel center bore: 66.6 mm
- Vehicle hub pilot: 57.1 mm
- Ring dimensions: 66.6 mm OD × 57.1 mm ID
- Dimensions are labeled as OD and ID, not merely shown as an unexplained pair
- Ring profile and depth suit the wheel bore and hub
- Material and construction are suitable for the intended use
- The wheel also matches the vehicle in bolt pattern, offset, load requirements, brake clearance, and fastener-seat type
The key sizing direction is simple: the larger number matches the wheel bore, and the smaller number matches the vehicle hub. For this fitment, select by the verified 66.6 mm wheel bore and 57.1 mm hub pilot, then confirm the ring’s profile and seating before installation.
