Has anyone compared stock 8.5" 245 40 18 R compounds with 9.0/9.5.10.0/10.5 and 255/265/275/285 R compounds of the same make to compare their road course time differences in order to determine any benefit in going larger than 8.5/9.0 and 245? Most go larger without comparing the pre/post modification. Ignore look of wheel and offset for now. I am running 9.5/275 NT01's. Sometimes you can go too large and drag/other issues become a problem.