Thanks folks, I had read the Diablo Corsa review and have run the rear at 36, 34 and 32 psi without significant change in feel or performance (bit of rear chatter under hard braking at 36 - possibly not related). The wear pattern on the tyre seems best at 32 (nice and orange peely), and whilst the reviewer undoubtably knows what he is talking about, all of the other sources of advice that I respect favour lower pressures, especially at the track temperatures in the South of France (last July I was on track for 2 days at 39 degC!). So, anyone got a clear answer to my main question - is the tyre overheating and losing grip and should I back off? Or is a little slide every now and then to be expected and should I just suck it up? (Troy Corser's opinion not required). Thanks for your input Jools, but if I wait to get upright before I gas it, I'm giving away my main advantage over the I4s, and I'm dealing with some pretty long straights here, so I need all the get up and go I can find. BTW - I'm still running a 190 - could this be the problem? I have a 180 Diablo Corsa and a set of Supercorsas with a 180 rear ready for the next bash, so maybe I've already got a fix. Bike is a 998 with an S upgrade kit. Spinoli |