Are Fuch rims hubcentric?

[SlantnoseSD]

I had some 1" spacers on the fornt of my car witht he Fuch rims and I woudl get a vibration whihc makes me believe that maybe the rims need hubcentric spacers.

Are these rims Hubcentric?

[Bullet Bob]

The rims should be centered by the lug nuts when they are tightened. Did the spacer have its own bolts, or did it slide on over long bolts? If it had its own bolts I would suspect the spacer.

[SlantnoseSD]

It had its own bolts.

[Wil Ferch]

No.... Fuchs slide over a center pilot and are indeed hubcentric.

Spacers ( if used) shoud have a "female" recess on the backside ( to fit over the original "pilot" of the wheel hub)....and the spacers should have a small lip on the front-side...to accommodate the wheel bore. This would regain the hubcentricity it had before.

The 5 lugs of a 911 do not center the wheel..unless we're talkin' 914's. They use 4 bolts (instead of studs)....with nothing in the center to "pilot" the fit. In that case, the 4 bolts center the wheel.

BTW...lingo issue....SPACERS are units that use longer OEM studs. In contrast ADAPTORS have their own studs...and you have 10 bolts to tighten for the whole "works" to function properly. This is an independent issue of whether or not the spacer ( or adaptor) is hub-centric.

- Wil

[Miguel Antonett]

Yes, Fuchs are hubcentric and the proper spacers must be also, to match (female and male).

[SlantnoseSD]

ok, then I had adapters on the car that the PO put on but they were not hubcentric. I guess I need to find some hubcentric 1" adapters.

Anybody have some?

[Bullet Bob]

I always thought that the lug nuts would center the wheel, as they have a spherical profile on the end that engages the wheel, similar to a counter sunk machine screw. If the center pilot was not perfectly coincentric with the bolt circle there would be binding and bending stresses placed on the studs when the nuts are tightened. Apparently I am wrong about this, oh well. One to file away for future reference.