not as hard as a dedicated track tyre but better than a normal tyre but you need xl versions otherwise theyll be supersoft. When pushed hard you can feel the tyre wall start to give an induce understeer but....I may try these next. Anybody running 225/45/17? Not sure if they would rub on a lowered teg? Also what are the sidewalls like on the F1 assymetrics? I dont like them too soft