Just replaced the OEM Goodyears at approximately 6200 miles with the Super Sports at stock sizes, non RF, and what a difference. The ride improvement is immediately noticeable, no more harsh thumps arriving into the cabin. The traction is on par with past Nitto R2s I had on my 510rwhp C5 ZO6, which was nearly as good as full slicks except from a stand still launch. I can now go full throttle in first with my 503rwhp '08 from a roll with just a little spin at 4k and then dead hook, a loud chirp on the 1-2 shift and then full traction from there. Previously first was useless, 2nd the same if coming from a spinning 1st gear. Great handling also. I haven't had a chance to push it to the limits in corners, but I think the tires prowess in road racing is already established in various sanctioned series. I happy to get exactly what I was hoping for. The best tire I've experienced, so far.