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I have a 99 c5 with original runflats 15000 miles just bought it last year. I swaped out the stock rims for the c6 ones but kept the tires. About 80-100 mph I get some vibration in variing strenghts that is not continious, its comes and goes, is that coming from the varying road surface and the runflats???
I have a 99 c5 with original runflats 15000 miles just bought it last year. I swaped out the stock rims for the c6 ones but kept the tires. About 80-100 mph I get some vibration in variing strenghts that is not continious, its comes and goes, is that coming from the varying road surface and the runflats???
Sounds like a tire balance issue to me. You started to notice this vibration after you installed the new rims. Take it back to the shop where you had the rims installed and insist they re-balance with a fine tune setting.
To be honest, your best approach is to find a shop that will match mount and balance your tires with road force. You want a shop that has a Hunter GSP 9700 road force balancer. I guarantee your problems will be gone if you go this route. Good luck with it.
Is the vibration in the steering wheel or is the whole car vibrating? The tires may not have been mounted true on the rims and one or more tire beeds may be off a little. Then again in could be some road surfaces, although if it is the road, you would have felt this vibration on these roads with the old rims!