[z3papa]

It depends on whether you are willing to flip your tires or not. Flipping tires takes the worn side and flips it to the inside where the tire is not in prime contact when you realize camber gain at the extremes. If I am going to flip a set, I'll go roughly 3-4k miles and 50-60 runs, and then flip knowing that first event post flip will suck. This allows you to get about 7-8k miles and about 120 competitive runs out of a set. The BS are pretty good down to the very last bit 2/32's which is below the first wear bars.