Iam wearing the the Sumitomo HTRZ's on my roadster. They are sticky. If I get into an oversteer situation and work my way throught it, They hop hard instead of give way, sort of bang,bang,bang in quick succession. Before that, I had my Victo's on full time. I was warned by a freind, Gordon Glasgow, that race tires on the weekend warrior may not be a good thing. His BFG R-1's on his 510, ended up cracking across the face, well before wearing out. Of course, I'm too smart to listen. That is, untill the Victo's cracked arcoss the face, well before wearing out! But, It was very cool. besides the grip, there's the coolness factor of people tell you, "Hey! your tires are worn bald!" To which you reply, "I know. I paid extra for that!" Oh, most of the DOT race tires have a VERY stiff inner sidewall that transfers the bump of every pothole and divit straight to your arse! To some that might be pleasnt. I didn't car for it much. If your just going to drive across town (or 100 miles) to the AutoX event. leaving your Victoracers on is good idea. Beats changing tires at the track!