What Is the Center Bore?
The center bore is the machined hole in the middle of the wheel that fits over the vehicle’s hub. Its diameter is measured in millimeters — common values are 57.1 mm (VW/Audi), 60.1 mm (Toyota), 64.1 mm (Honda), 66.6 mm (Mercedes), 72.6 mm (BMW) and 78.1 mm (US trucks).
Hub-Centric vs Lug-Centric Fit
When the center bore matches the hub diameter exactly, the wheel is hub-centric: the hub carries the weight and centers the wheel perfectly. When the bore is larger than the hub, the wheel is centered only by the lug nuts — lug-centric. On fast roads, a lug-centric fit can vibrate because the wheel is never perfectly centered.
How to Measure the Correct Center Bore
- Measure the diameter of the hub flange on your car (the metal ring the wheel sits on) with a caliper.
- Or check the factory wheel — the bore size is often stamped on the back of the rim.
- Look up your vehicle in a wheel fitment database; most list the correct bore with the PCD.
Hub Rings (Spigot Rings) and When You Need Them
If the wheel bore is larger than the hub, plastic or aluminum hub rings fill the gap and convert the fit back to hub-centric. Aluminum rings are more durable; plastic rings are fine for street use and cheaper to replace. Never run a wheel with a bore smaller than the hub — it physically will not fit.
Why XINCHIDA Confirms Bore for Every Order
A wrong center bore means vibration, noise and uneven tire wear. When you order from us, we confirm the bore against your exact vehicle model, and supply hub rings with the order when the bore is larger. Browse our wheel catalog or send us your vehicle details for a fitment check.