Not sure if this is useful or not-
It's a cock up to make a wheel that doesn't really fit centre on the hub spigot. Hub centric wheels should have the studs or bolts ONLY in tension, holding the wheel on, the load path and centreing should be through the spigot over which the counter bore in the wheel should be a snug fit. Makers often bore a big hole in aftermarket rims and use a ring to bring it down in size. Sometimes they are evn plastic, often they don't get used, or get lost. Buy a rim that is made for the spigot size of the car, don't use adaptor rings. IMO.
written by a suspension track car set up specialist.
I m thinking of fitting these spoon wheels to my dc2 and the center bore is massive where as the slips that are on the car fit perfect but are much heavier and not as strong i guess.
Sorry this was abit random but I was searching if spoon made different center bore sizes for such a expensive wheel and saw this