Originally Posted by
DakarM
rt-615 good for autox not as good for track. heats up too fast and feels greasy but not as much as the old 215
t1-r not so good for autox because of the super soft shoulders (wears out very quickly) but much better for track, very predictable and decent wear.
btw for occasional autox just run whatever you have. no need to spend extra money when you wont even see the difference in time.
I've friends that ran RT615 on the track and they held up pretty good. This was on the short tracks with a lot of braking and turns, on 20 mines sessions, with little break time in between. To me, they're pretty good. I haven't ran the 215 before so I can't really compare, but for track, I kinda like them.
I've rand T1R on the track and they're pretty good like you said. I can't believe how well they perform on heavy 19s. Much better than the PS2 on my OEM 18s. I also did some AutoX with them and they didn't perform well. So I don't suggest the T1R for AutoX at all.
For the money, I'd go with T1R and be comfortable on both street and tracks. RT615 is good in overall, but like I said, they're a little heavy and sucks in rain. But they're still good tires.