Wheel Question Again... the saga continues - ZR-1 Net Registry Forums

Racinfan83 · 06-05-2014

Ok as some of you know I have had a vibration since I got the car. Multiple balances, new tires, checked car over several times both by myself and the best Vette tech in town, still has vibration. The Vette guy thinks problem is because the aftermarket "OE Wheels" are not hubcentric. And they are loose on the hubs by about .036-.038. I finally got ahold of a guy at OE Wheels and this is part of what he sent back: The only thing I can think of is that maybe the hub on the true c4 ZR1 is smaller in diameter than the base Corvette of that year. We would not have any hub rings for that because the center bore on the wheel is 70.7 mm. I don’t know if there are any hub rungs even available in the size that you indicated."
Is that a true statement? My hubs measure 2.75. Wheel center bores are 2.786 (70mm and 70.7mm). I have been trying to Fab some shims that fit inside the wheel bore, tried .020 aluminum last night and its too thick. Gonna see if I can come up with some .016 stuff and try that. Any other ideas?

06-05-2014	#1
Racinfan83 Join Date: Apr 2013 Location: Eastern Missouri Posts: 773	Wheel Question Again... the saga continues Ok as some of you know I have had a vibration since I got the car. Multiple balances, new tires, checked car over several times both by myself and the best Vette tech in town, still has vibration. The Vette guy thinks problem is because the aftermarket "OE Wheels" are not hubcentric. And they are loose on the hubs by about .036-.038. I finally got ahold of a guy at OE Wheels and this is part of what he sent back: The only thing I can think of is that maybe the hub on the true c4 ZR1 is smaller in diameter than the base Corvette of that year. We would not have any hub rings for that because the center bore on the wheel is 70.7 mm. I don’t know if there are any hub rungs even available in the size that you indicated." Is that a true statement? My hubs measure 2.75. Wheel center bores are 2.786 (70mm and 70.7mm). I have been trying to Fab some shims that fit inside the wheel bore, tried .020 aluminum last night and its too thick. Gonna see if I can come up with some .016 stuff and try that. Any other ideas? __________________ [LEFT][SIGPIC][/SIGPIC][/LEFT] [CENTER][COLOR=Indigo][SIZE=4][I][B] Now Sold 1990 ZR-1 #2093, Black on Black..[/B][/I][/SIZE][/COLOR][/CENTER]