For anyone rocking Q3's on the street, how many miles have you got out of them? I run the recommended 36-42 psi and have a little over 2k miles and the rear is nearing the end of it's life. Slight squaring from freeway commuting. I know they're not touring tires, but I was expecting a bit more than 2,200. Front still looks pretty good. I'm guessing to go through two rears per front.