Are OEM wheels hubcentric?
04-03-2012, 08:23 PM
#61
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04-03-2012, 11:31 PM
#62
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Also, I've never done a final torque of the lug nuts while the car is in the air. I change wheels/tires frequently. With the car in the air I 'hang' the wheel on the studs. Pushing the wheel in I power-spin my open-ended lug nuts on in a 'star' pattern centering the wheel on the studs. I then (still with the wheel in the air) make another pass tightening the lug nuts (by hand) with a socket and swivel extension bar. This gets the lug nuts to near torque specs and further centers the wheel on the studs. I then lower the car and torque the lug nuts to spec with a torque wrench.
Whatever they're called they work fine for me.
04-04-2012, 10:22 PM
#63
Wil Cooksey #256
06-04-2012, 11:57 AM
#66
Tech Contributor
If this is true. that the ALL the corvette factory wheels are lug centric then:
The fact that the factory reproduction spyder wheels (balanced perfectly) are swimming (slightly exaggerated) on the hub before the lugs are tightened could not possibly cause wheel vibration at 65-70.
However, the factory base wheels NEVER vibrated at 65-70 and they were taken off and put back on several times and balanced perfectly on the same wheel balancing machine.
wtf
The fact that the factory reproduction spyder wheels (balanced perfectly) are swimming (slightly exaggerated) on the hub before the lugs are tightened could not possibly cause wheel vibration at 65-70.
However, the factory base wheels NEVER vibrated at 65-70 and they were taken off and put back on several times and balanced perfectly on the same wheel balancing machine.
wtf
Some aftermarket wheels do not. Take this washer off your discs (you don't need it, the brake caliper holds the disc on) and your vibration will be gone.
03-03-2020, 04:40 PM
#67
Racer
There are OEM wheels that use tapered lug nuts on steel wheels and shouldered on alloy wheels. The wheels are lug centric and need a adaptor to balance them.
Toyota, Honda, Nissan, are all lug centric. Usually the people who balance the wheels will know this.
Toyota, Honda, Nissan, are all lug centric. Usually the people who balance the wheels will know this.
03-04-2020, 08:23 AM
#68
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09-24-2020, 11:53 PM
#69
All C4 Corvette wheels are hub-centric! https://www.wheel-size.com/size/chevrolet/corvette/ You can check the other years here.
09-25-2020, 01:28 AM
#70
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All C4 Corvette wheels are hub-centric! https://www.wheel-size.com/size/chevrolet/corvette/ You can check the other years here.
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10-18-2020, 05:50 PM
#72
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OK, here you go. C4, C5, C6 OEM wheels have a center bore (i.e.'hole') of 70.3 mm. Go to https://www.wheel-size.com and look it up if you don't believe it.
The flange on the wheel hub for those vettes has an OD of 70.10 tapering up to 70.61 mm, which is close my friend, but no cigar. See this article's diagram and dimensions: http://www.vettemod.com/forum/showthread.php?t=10699 The fact that it isn't an interference fit makes them lug-centric by definition.
If you've ever taken the OEM wheel off of one of these vettes, you'd know that the wheels aren't hub-centric, because they pretty much fall right off when the last lug nut is removed. That wouldn't happen if they were hub centric because the close fit of the hub to the center bore would prevent that from happening. You can purchase adapter rings and wheel spacers which turn the mounting into hub-centric for OEM wheels, but shipped from the factory, the wheels are lug-centric. I'm pretty sure C7 wheels are also lug-centric, but I didn't research it.
The flange on the wheel hub for those vettes has an OD of 70.10 tapering up to 70.61 mm, which is close my friend, but no cigar. See this article's diagram and dimensions: http://www.vettemod.com/forum/showthread.php?t=10699 The fact that it isn't an interference fit makes them lug-centric by definition.
If you've ever taken the OEM wheel off of one of these vettes, you'd know that the wheels aren't hub-centric, because they pretty much fall right off when the last lug nut is removed. That wouldn't happen if they were hub centric because the close fit of the hub to the center bore would prevent that from happening. You can purchase adapter rings and wheel spacers which turn the mounting into hub-centric for OEM wheels, but shipped from the factory, the wheels are lug-centric. I'm pretty sure C7 wheels are also lug-centric, but I didn't research it.
10-18-2020, 06:54 PM
#73
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The flange on the wheel hub for those vettes has an OD of 70.10 tapering up to 70.61 mm, which is close my friend, but no cigar. See this article's diagram and dimensions: http://www.vettemod.com/forum/showthread.php?t=10699 The fact that it isn't an interference fit makes them lug-centric by definition.
If you've ever taken the OEM wheel off of one of these vettes, you'd know that the wheels aren't hub-centric, because they pretty much fall right off when the last lug nut is removed. That wouldn't happen if they were hub centric because the close fit of the hub to the center bore would prevent that from happening.
Exactly .....
10-18-2020, 09:31 PM
#74
OK, here you go. C4, C5, C6 OEM wheels have a center bore (i.e.'hole') of 70.3 mm. Go to https://www.wheel-size.com and look it up if you don't believe it.
The flange on the wheel hub for those vettes has an OD of 70.10 tapering up to 70.61 mm, which is close my friend, but no cigar. See this article's diagram and dimensions: http://www.vettemod.com/forum/showthread.php?t=10699 The fact that it isn't an interference fit makes them lug-centric by definition.
If you've ever taken the OEM wheel off of one of these vettes, you'd know that the wheels aren't hub-centric, because they pretty much fall right off when the last lug nut is removed. That wouldn't happen if they were hub centric because the close fit of the hub to the center bore would prevent that from happening. You can purchase adapter rings and wheel spacers which turn the mounting into hub-centric for OEM wheels, but shipped from the factory, the wheels are lug-centric. I'm pretty sure C7 wheels are also lug-centric, but I didn't research it.
The flange on the wheel hub for those vettes has an OD of 70.10 tapering up to 70.61 mm, which is close my friend, but no cigar. See this article's diagram and dimensions: http://www.vettemod.com/forum/showthread.php?t=10699 The fact that it isn't an interference fit makes them lug-centric by definition.
If you've ever taken the OEM wheel off of one of these vettes, you'd know that the wheels aren't hub-centric, because they pretty much fall right off when the last lug nut is removed. That wouldn't happen if they were hub centric because the close fit of the hub to the center bore would prevent that from happening. You can purchase adapter rings and wheel spacers which turn the mounting into hub-centric for OEM wheels, but shipped from the factory, the wheels are lug-centric. I'm pretty sure C7 wheels are also lug-centric, but I didn't research it.
10-18-2020, 11:05 PM
#75
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I read the diagram incorrectly. My bad. There's no taper. So we still have the difference between 70.5 and 70.3. You know that the lugs couldn't be drawing the wheel down onto a larger taper because the wheel would get jammed solid on there and as I said the wheel pretty much falls off when you remove the lug nuts unlike a hub centric wheel. Our club has a tire shop as a sponsor and we sometimes meet there. The owner gave us a detailed explanation of how his balancing equipment operated and the specialized adapters needed to ensure that lug centric wheels such as were on the vettes were properly centered on the balancer because it couldn't be guaranteed that the center bore was exactly centered unlike if the wheel was actually hub centric. The 70.3 mm hub assists you in getting the wheel centered but that's it. The weight and generated torque is handled by the studs and friction against the hub. The taper on the lug nuts center the wheel.
10-19-2020, 12:09 AM
#76
I read the diagram incorrectly. My bad. There's no taper. So we still have the difference between 70.5 and 70.3. You know that the lugs couldn't be drawing the wheel down onto a larger taper because the wheel would get jammed solid on there and as I said the wheel pretty much falls off when you remove the lug nuts unlike a hub centric wheel. Our club has a tire shop as a sponsor and we sometimes meet there. The owner gave us a detailed explanation of how his balancing equipment operated and the specialized adapters needed to ensure that lug centric wheels such as were on the vettes were properly centered on the balancer because it couldn't be guaranteed that the center bore was exactly centered unlike if the wheel was actually hub centric. The 70.3 mm hub assists you in getting the wheel centered but that's it. The weight and generated torque is handled by the studs and friction against the hub. The taper on the lug nuts center the wheel.
read says newer cars are all hub-centric and these cars being high-speed vehicles I would tend to believe they are hub-centric. I bought a set of Cray Manta wheels made by TSW and they said in there ad their wheels for Corvettes are hub-centric!
10-19-2020, 06:18 AM
#77
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Are Cray Manta wheels OEM?
Last edited by FatsWaller; 10-19-2020 at 06:19 AM.
10-19-2020, 09:56 AM
#78
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See post #28 here https://www.corvetteforum.com/forums...centric-2.html and argue your case with Chevy Customer Service
Last edited by FatsWaller; 10-19-2020 at 12:04 PM. Reason: Post number was wrong
10-19-2020, 10:05 AM
#79
Race Director
I'm just wondering why this guy is arguing with a 10 year-old thread...