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Old 11-15-2013, 04:59 AM   #1
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Centramatics - are they causing teeth to chatter?

I took my new-to-me class A to a Goodyear tire center to rotate and balance. The issue was uneven wear on the front tires. Going in, there was no concern with the balance, just the uneven wear. After leaving and getting on the highway, my teeth were almost chattering from the vibration. Since we left at quitting time and were on a schedule, going back was not an option.

The Spartan shop is recommending removing the Centramatics to solve the problem. Is it possible that the Centramatics settled into the correct position for the old tires and froze there? Now that a different, balanced tire is on that hub are the frozen beads putting the wheel out of balance?

Comments?
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Old 11-15-2013, 05:03 AM   #2
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Here's a link to some previous threads which may have some answers for you.

https://www.google.com/search?q=Cent...earch=irv2.com
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Old 11-15-2013, 05:19 PM   #3
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If the dealer BALANCED the tire using weights, THIS IS YOUR PROBLEM !!! Throw away the wheel weights. Use only the CENTRAMATICS. When I added the CENTRAMATICS, I removed over a pound of weights from the six wheels. No more balance problems. Find a tire dealer that knows what he's doing.
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Old 11-15-2013, 05:35 PM   #4
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The whole point of the centramatics is that you don't need to balance the wheels individually. I don't believe it is possible for the weights in the centramatic to stick in one position. Do as woodfoot advised.
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Old 11-15-2013, 05:40 PM   #5
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woodfoot is right. Throw away the wheel weights. Use only the CENTRAMATICS. They will do the job.
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Old 11-15-2013, 06:04 PM   #6
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Yes, remove the lead weights. But if the tires are badly scalloped, they may still give you some roughness in the ride.

Ken
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Old 11-15-2013, 07:13 PM   #7
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Uneven tire wear

If you have uneven tire wear, and didn't change the tires, no amount of balancing, centramatics, or any other "fix" is going to fix a tire with uneven tire wear. It will continue to bounce down the road. If you have tire wear that you can see, that tire is too far gone for any kind of fix, short of replacing the tires.

Centramatics do work. We used them on our semi trucks, and usually got 200,000 miles on a set of steer tires.. We also did a three axle alignments, and maintained proper air pressure, and wheel bearings, did not abuse the tires, and shocks; all factors in long tire life.
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Old 11-16-2013, 04:47 AM   #8
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Quote:
Originally Posted by woodfoot View Post
If the dealer BALANCED the tire using weights, THIS IS YOUR PROBLEM !!! Throw away the wheel weights. Use only the CENTRAMATICS. When I added the CENTRAMATICS, I removed over a pound of weights from the six wheels. No more balance problems. Find a tire dealer that knows what he's doing.
You are saying that a tire/wheel must be out of balance for the Centramatics to work. So in the case of a tire/wheel/valve combination that happens to be in balance, as probability suggests must happen occasionally, the Centramatics device will actually unbalance that wheel. A weight would have to be added to unbalance the wheel so that the device can re-balance it.

Per the manufacturer's recommendation, the Centramatics were removed and the vibration has decreased.

This being my first coach, I did not know what Centramatics looked like or that they were installed on this vehicle. The Goodyear tire shop's policy was "we balance every tire we install" as a point of professional pride. The manufacturer's position is that "we are not going to try to fix a problem if our product has been modified from the factory specification".

Thank you all for your input.
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