You don't bike in the city do you. I ride on 700C Continental Gatorskins, which means about a half inch of contact width with the road. They ride on cobblestone, glass, potholes, rat carcasses, gravel, trash, ice, you name it. About 85PSI +/- 5. Skinny tires are a lot better at urban riding than you'd think. Of course, the woven layer of kevlar doesn't hurt either.