man, the stock 015 on my K9 Busa only lasted 2950 miles, went to a Dunlop Qualifier and only got 2200 miles out of it, then went to a CT2 and got 4700 out of it. I don't do track days either. I guess I ride a little hard, but hey, what's a Busa for?!?! I'm picking my Busa up Friday from the shop. Just had oil change and Shinko 005 Advance's front and rear. For the price, I'll be happy to get 1500 miles out of them!!