Quote Originally Posted by Supercharged111 View Post
I ran them years and years ago and found them to be greasy. Granted my pressures were too high without me knowing, but I replaced them with some Yokohama Advan Neova AD07 which were all the rage at the time and those tires were MUCH more consistent. I'll admit I'd figured out tire pressures by then, but the difference was simply mind blowing. Knowing what I know now, there was more than tire pressures playing into that. Having said all that, the K is supposed to have much better manners and its size offerings have had me willing to give them another shot. Daniel have you ever run a street tire on a road course before? I'm curious to hear your impressions if you have some frame of reference still for the difference between our R comps and a sticky street tire.
We ran the 200TW Dunlop Direzzas on our WRL BMW E30 car and I always liked them. They were noisy at the limit and broke away smoothly and were easy to control past the limit. We always fought chunking on the outside edges of the front tires as we'd run full tread but otherwise no complaints. I don't remember them being susceptible to getting greasy but we also kept a laptime pace that didn't abuse the car to try and finish.

On my E36 M3 I ran the sticky Hankook tire of the time and they were fantastic all the way to the cords. Lots of grip on a square setup and never had issues in 20min DE sessions with greasing.

I have found the RR's to be more similar to a street tire than a race tire except for the short life in terms of heat cycles. The RR's seem to like quite a bit of slip angle and are pretty controlable in a slide. Since my street tire experience is on a different chassis with an independent rear suspension I'll see how the RT615K's compare in a few weeks with the RR's. My experience on "real" race tires was in a Formula SAE car on 10" Hoosier LC0's which behaved like a race tire. They liked some slip angle for maximum grip but go a bit past that optimum and it felt like grip went to 0... really fun and rewarding to get right. I used to have a funny video in that car where I was booking around an AX course and then went full 360. It was a good illustration of running out of talent and consequently tire grip.