T1-R in the dry on track are s**te.
Had them on my saxo (supercharged) for a track day, striahg tline grip was fine but pushing hard into corners i found them folding off the rim s far too easily.
it was that bad that id scrubbed the writing off the tyre walls compeletly.
very poor imo. great for a fast track like bedford autodrome as there are very little slow speed high load corners, but on a smaller track they were crap. found they blistered too quickly also.
Ive recently been out in a car with the michellin exalto's on, dead imprssed. will be gettin them for my next tyre purchase