quote:Originally posted by David B:
But the lug nuts are extended and fit inside the wheel holes exactly - no play at all. They go thru the wheel and tighten down on the long extended studs. There are centering rings on each lug nut.
David,
That type of lugnut is called 'conical'. It's end that contacts the wheel is cone shaped and self centers in the funnel shaped seat in the wheel. It's like a flare fitting for a hose where there is a male shaped cone and a female shaped funnel that mate together. In the case of the hose, it's for sealing, and in the case of the wheels, it's for centering.
Another type of lug nut is the 'shank' type. It is flat underneath the head and uses a big washer between the head and wheel. A wheel that uses a shank type of lug nut must be hub centric because this type of lug nut passes through the wheel and only secures the wheel to the car. I had a set of Centerline wheels that used shank lug nuts.
Conical lug nuts have been the norm for a very long time now and are what Car manufacturers have been using on cars for decades.
Michael