How to measure hub centric rings
To choose the right hub centric ring, you need two measurements: the car hub diameter (inner measurement) and the wheel center bore diameter (outer measurement). Here is a guide for measuring both.
1. Measuring the car hub
The car hub is usually easy to measure with calipers. Measure the outer diameter of the hub — the surface where the hub centric ring sits. This gives you the inner measurement of the hub centric ring.
The hub size can often also be found in your car's technical specifications or on our car models page.
2. Measuring the wheel center bore
The wheel center bore is best measured with an appropriate tool. The problem with regular calipers is that they usually don't fit inside the wheel to measure the center bore diameter directly.
Solution: measuring with a wedge
If calipers don't fit inside the wheel, you can measure the center bore like this:
- Make a wedge-shaped piece from stiff cardboard
- Insert the wedge into the wheel center bore so it touches both edges
- Mark the points where the wedge touches the edges of the center bore
- Measure the distance between the marks with calipers — this is the center bore diameter. Note that this method may give a small measurement error — but when comparing available sizes, you'll likely find a very close match — choose that one!
3. Measuring from an old hub centric ring
If you already have old hub centric rings, you can measure the right size directly from them! Measure the outer diameter (= wheel center bore) and inner diameter (= car hub) with calipers. This gives you both measurements at once.
4. Choosing the right hub centric ring
Once you have both measurements, the hub centric ring size is:
Wheel center bore ➡ Car hub
For example: if the wheel center bore is 73.1 mm and the hub is 57.1 mm, you need hub centric ring 73.1 ➡ 57.1.
See all hub centric ring sizes or find hub size by car model.
Need help measuring?
If you're not sure about the measurements, contact us — we're happy to help you find the right size!