We have been using the Goodyear Rs's for 3 years and get 10-12 heat cycles out of them before they are too thin to run. We have rear wheel drive 3,000 lb cars-maybe it's the front wheel drive that is killing them? I like the goodyears as they don't get greasy in the second half of the race when youre pushing hard. The only issue we have had is that they seem to take a little longer than the hoosiers to get really sticky.