I'll be very surprised if they're different Byers
Carl08 -
Wheel Centre Bore and Spigot Rings Explained:This is the diameter of the centre hole in the back of the wheel. It is crucial that the centre bore of the wheel locates properly on the lip on the hub of the vehicle to get a perfect fit. Most wheels work on a spigot ring locating system because most wheels have a centre bore bigger than the size of the hub lip allowing them to fit a wider range of cars. A spigot ring is fitted into the back of the wheel with an outer diameter the size of the centre bore, and an inner diameter the size of the hub lip to allow the wheel to be correctly located onto the hub and to fit tightly onto the vehicle for safety and comfort.There are wheels that are hub-centric i.e. the wheel is manufactured with a centre bore to fit precisely onto a specific vehicle and in these cases we would not supply spigot rings as they would be unnecessary.If the wheel does not locate onto the vehicle's hub assembly correctly it will cause a vibration on the steering wheel and can lead to bad wear on the tyres and bearings so if spigot rings are provided you MUST use them.
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