well, yesterday, i was driving home and my passenger front tire blew a bead at 20psi?!?! but i pulled over a put a spare on it. the tire is a BFG M/T and i still want to drive on it. so i got home and poped the tire back on and filled it to 35psi but the inside sidewall is showing white rubber, is this bad or no? how thick is the sidewall and when would i have to worry about it?