Spigot rings
Why a wheel has a centre bore, how to choose spigot rings and what the tapered seats on the bolts are for.
From the lead article
The question of spigot rings usually comes up when a car owner plans to fit non-standard wheels (that is, wheels not directly specified by the car maker for that particular car), some of whose figures (in particular the centre bore) do not quite match those of the standard wheels.
Articles in this sectionIn reading order.
- Spigot rings for wheels: everything you need to knowSpigot rings (hub-centric rings) for wheels: some say they are unnecessary, others that they are essential. Why you may need them and how to choose them.introduction, 261 words
- Why does a wheel need a centre bore?Why a wheel needs a centre bore: why it, and not the tapered seats of the bolts, centres the wheel on the hub, whatever sellers may say.416 words
- How do you choose spigot rings?How to choose spigot rings for wheels: when they help, why you must not bore out the centre bore, and whether plastic or aluminium is better.664 words
- Why are there tapered seats on wheel bolts and nuts?Why wheel bolts and nuts have tapered seats, and why they do not guarantee precise centring of the wheel on the hub.469 words