What pressures are you running on the SDR? Just picked one up with M7RR's found theyre brilliant. Got rid of any strips within 21 miles of running it in! Also what track pressures as Im at Silverstone on 19th with the SDR.
I thought there was a greater difference between Rosso Corsa II and Rosso III's (aside from the tread) might give the Corsa II's a shot next.
30-30 or 32-30 in roads.
on track, I did 30-28. This was on Rosso Corsa 2.