QUOTE(mskala @ Apr 14 2014, 03:36 PM)
QUOTE(SirAndy @ Apr 14 2014, 03:03 PM)
QUOTE(mskala @ Apr 14 2014, 11:58 AM)
However, you already have the studs there, which will center the wheel. I don't see
any mod to the part to make it threaded for using wheel bolts.
You lost me there ... Wheel bolts????
The point is that with even with 5 studs, you're relying on those to center your wheels when tightened and there is a chance that you'll torque down your wheels slightly off center and create a wheel imbalance.
The inner 3 piece ring on the new hub shown in this thread makes sure that the wheel is completely centered. Hub centric they call them for that reason.
That allows for proper wheel fitment every time with now chance of getting them off center.
The lug nuts are spherical and will center to the studs. So what you're saying is
that Porsche is incapable of producing a hub with properly aligned studs, but it is
totally capable of producing a perfectly aligned ring for centering.
It is quite possible to torque down a wheel offcenter.
Aluminum wheels, steel (bolts or nuts) can grab the wheel in such a way that you can honestly mount them off center, and they bounce like crazy.
I learned all about this with my BMW....with stock wheels....
I jumped up to 7 series which had a center hole 2mm larger....wheel bounced all over the place.
I had to get special adapters, little plastic sleeves that fit over the hub....fixed it.
I mounted those wheels probably 20 times trying to figure this out.
Had them balanced at least 5 times, at three different shops.
Ended up being a 4 dollar little sleeve, all was well.
rich