The wheel should sit on the centre of the wheel hub, the idea being that the weight of the vehicle is transferred through the hub to the wheel on the spigot and not be taken by the bolts holding the wheels on (the wheel bolts should only be used to hold the wheel to the face of the hub, not be load bearing in any other way), a spigot ring adapts the size of the hub to the hole on the inside of the wheel so this weight transfer can be maintained.
On a vehicle that uses bolts into the hub rather than bolts sticking out of the hub, the effect is that you can spin the wheel on the hub purely by the wheels interaction with the spigot centring the wheel on the hub, this is where the weight transfer should be, it also aids in ensuring you don't get terrible vibrations whilst driving from a wheel being off centre in relation to the hub.
What are spigot rings and how do spigot rings work? Find out all you need to know about alloy wheel spigot rings, how to measure spigot rings and the different kinds of spigot rings for sale here. Buy spigot rings online from Performance Alloys, with free shipping and worldwide delivery available.
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