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Saw your q on RE-11 under RS-3 thread. I have tracked both tires. RE-11 very strong sidewall (my tire installer had a hard time getting it off without scratching the rim) and I could tell the diff when I switched to RS-3. The car wiggled a little. RE-11 don't heat cycle out much where as RS-3 does. RS-3 is a little faster. But after about 20 sessions or so, the heat cycled RS-3 runs about the same time as the new RE-11. Last yr at laguna I ran RE-11 with best lap time 1:44. Hope this helps.