Used Pro race, hutchison fusion, lithion and GP4000. The Gatorskin and GP4000 are far superior in grip especially in the wet. I have punctured them, but some objects are just going to do that. I run 110psi as recommended. No sidewall issues at all. I run a combo of gator on the rear and GP4000 front on the training bike and this I great Tyres. See German Tour magazine tyre review