Re: red line tires
I use both Coker and Kelsey. Both are excellent, although pricey for such awful driving tires!
Coker does not sell Goodyear tires, just the Firestone Super Sports and Wide Ovals. In my experience (and I have mounted 100's of repo tires) the Goodyears seem to be of higher quality. We use a Hunter 9700 Road Force balancer, wich measures such things as tire run-out and runs a drum against the tire to simulate actual loaded use. Then it gives a road force measurment, i.e., the actual amount of force placed on the road by the tire. The lower the better, as lower force means the tire is more round and simply doing its job. GM will throw out any tire on a new car that has a vibration complaint under warranty if the road force exceeds 15lbs.
Typically, on G70-14 Wide Ovals (Judge tires!), we have been getting 60-80 lbs of road force. This is TERRIBLE! You will feel 25 lbs. pretty easily. With indexing and sometimes much trial and error, we can usually get them into the 20-30 lb range. Usually!
I just put a set of Goodyear Speedway 350 repo Shelby tires on my GT500. The road force was 12 - 28 lbs before indexing for a set of 4. After indexing, I was able to get them all to 7-12 lbs. In other words, acceptable for a modern tire.
Just my experience. As a general rule, I just buy the tire that is correct for the car and make the best of it. I recommend finding a good tire guy with a Hunter 9700 and spending the extra money to have them road force balanced.
Once again, my $.02 . Street value $.01. Use it as you wish!
Colin
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