c6 tire balancing question
Thread Starter
Instructor
Joined: May 2005
Posts: 220
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From: Boca Raton FL
c6 tire balancing question
My c6 has about 10,800 on the original EMT goodyear tires. I've noticed that the tires don't feel as smooth as they used to. When I hit around 82 mph I feel the rough rotation, is this the normal or average mileage to rebalance. I have plenty of tread left and the alignment is dead on. Also, does anyone have any recomendation on other tires? Any input would be appreciated. I'm running with stock bright chrome wheels. 
Last edited by VETTEWIZZ; Sep 14, 2005 at 09:08 PM.
Le Mans Master
Joined: Nov 2004
Posts: 6,566
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From: Goleta CA
Cruise-In VIII Veteran
Even if your alignment is perfect, you can still get uneven wear depending on driving habits or mismatch in tire pressures. So I would think that it is possible that they are no longer balanced.
Race Director
Joined: Mar 2005
Posts: 10,399
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From: Austin Texas
Originally Posted by VETTEWIZZ
My c6 has about 10,800 on the original EMT goodyear tires. I've noticed that the tires don't feel as smooth as they used to. When I hit around 82 mph I feel the rough rotation, is this the normal or average mileage to rebalance. I have plenty of tread left and the alignment is dead on. Also, does anyone have any recomendation on other tires? Any input would be appreciated. I'm running with stock bright chrome wheels.
Le Mans Master
Joined: Aug 2000
Posts: 5,531
Likes: 1,944
From: Austin Texas
Originally Posted by VETTEWIZZ
My c6 has about 10,800 on the original EMT goodyear tires. I've noticed that the tires don't feel as smooth as they used to. When I hit around 82 mph I feel the rough rotation, is this the normal or average mileage to rebalance. I have plenty of tread left and the alignment is dead on. Also, does anyone have any recomendation on other tires?
But instead of just having them reballanced, have the tech run the tire and measure runout to see if the tire is still round before the balancing. An unround tire cannot be properly balanced.
As to tire recommendations: non-Runflats
Team Owner
Joined: Sep 2000
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From: Far NW 'burbs of Chicago
St. Jude Donor '13
1. The best balancing machine is made by Hunter, it can do what they call a "Road Force Variation Test" which not only checks actual balance, but also checks for an out-of-round tire or bent wheel. If you Google the Hunter website, it has a link to a list of shops with the appropriate machine. With the wide & heavy tires on a C6, you want the very best balance possible.
2. The tread can develop "cupping", whcih is uneven in-and-out wear along one edge. This is one condition that the Hunter machine can not easily detect but it can give you the same vibrations as an out of balance wheel. A good tech may be able to spot it visually. Frequent tire rotation can help (not so easy on a C6 but possible). Once it's there, you either live with it or get new tires.
Hope this helps.
2. The tread can develop "cupping", whcih is uneven in-and-out wear along one edge. This is one condition that the Hunter machine can not easily detect but it can give you the same vibrations as an out of balance wheel. A good tech may be able to spot it visually. Frequent tire rotation can help (not so easy on a C6 but possible). Once it's there, you either live with it or get new tires.
Hope this helps.
