Supposed you got a nail smack dab in the center of the tire. Car sits overnite and gradually depressurizes. It now flat, you replace with spare and have the real tire patched. A)Since the sidewall bent out over nite under the vehicles weight is it no severely weakened or damaged? B)Is it true patched tires no longer meet a manafacturers top speed rating specification? The tire is Z (W) rated, my concern is being at 90 or above then blowing out and well...lets not go there. I am even considering patching it, then getting a brand new tire on there this week to replace it. The safety risk is my concern.