Quote:
Originally Posted by DuMa
it distributes stress and forces across the hub/studs and the wheel/lugs evenly on bumps and dips rather than just the lugs/studs
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No they don't. If they were actually taking any force, the plastic would be smashed after the first bump you hit.
Have you ever looked at how tiny the lip on the hub is, and how far offset it is from the centerline of the wheel? If you were to set a car down without lug studs in place, but the wheel properly lined up against the hub with centering rings, it would very quickly pop the wheel off the hub long before the full weight of the car was resting on the wheel.
With conical seat lugs, the only way the ring takes any force is if the lugs aren't seated and torqued down enough, or if the studs are bending.