I go through a set of tires at least once a year, performance wise michelin has better tires, goodyear way underates their treadlife, I typically get 80-90k out of 50k goodyear tires. I have now found that cheap tires are fine for normal use (anything short of lead footed racing types) and are typically a better bang for your buck. 40k liberators for my truck = 65 each, 50k goodyear = 140 each (255/65R16), I get at least 60k out of the liberators, and so for 130 I get about 30-40k more miles on two sets of liberators than on 1 set of goodyear for 40 less.