I got 5300 miles out of my OEM Z8 before I had a blowout due to it wearing down all the way to the belt... http://r1200rsforums.com/threads/newbie-rider-tire-question-small-holes-oem-z8-interact.3706/ and I'm about to change my Pirelli Angel GT A specs at 4500 miles, I ended up on some pretty rough roads on a a trip through Arkansas and was incredibly aggressive on all the the roads that were smoothe and twisty. I'm thinking of switching to PR 4 GT for the fall/winter and the chance it might rain while doing Moto escort for the Iron Man World championships. But good grief I see y'all going 8k-12k miles on a set and I'm stunned. I know I'm a bigger guy at 230lbs but I can't imagine that having such a huge impact on mileage. I can definitely be greedy with the throttle but I'm meticulous about my air pressure.