I've got the RSRR's, other than the noise, the grip once they warm up is exceptional. I've now done two events and don't feel I'm losing out from having ran semi's for the last few years. I actually got better lap times on these than I had on the Kumho V70's and find the braking performance very good. I've ran them at 32psi hot all round. I start them at 32psi and allow a lap or two to generate heat before pushing them, and bleed back to 32 psi at the end of each session. My side walls are not scrubbed at all so she's not rolling onto the shoulders.
I run them at 35psi on the street... no real logic for that, pick a number.
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