Last night I was taking an exit off the highway when some construction debris suddenly took a chunk out of my front-right rim and tire. The front-right rim/tire is unsafe to keep using, so I'm gonna get an entirely new set of wheels. However, the other three tires are still fine. Should I just buy 1 new tire to replace the busted one, or will the one new tire and the 3 old tires cause asymmetrical traction problems? Should I get two new tires to keep it symmetrical? All four?