I have K-60's on my Vee running 38 psi front and rear and the rear is NOT going to last for 5000 miles. I like the all around performance of the tire but thought I'd get way more life out of it. I'm sure my fast wear is due to a multiple of factors such as my riding style which is aggressive and rough road surface where I live and ride. As well as the fact that I'm 6'6" and 300# does not help with rear tire wear. I am amazed at the grip on pavement for a tire with such an open tread.