This last weekend I replaced both my 700x35 Schwalbe Marathon Supremes. These tires had 9,734.89 miles on them. Take a look at the cut-away view of the most worn tire. I was surprised how much tread was left. These tires had been rotated front to back three times. It become somewhat of a game to see how far these tires would go. I weigh 180 lbs and carry 10-15 lbs of food and gear. I commute 150 miles a week and these tires were installed for 2.5 years. Also worth noting: I had 5 flats in the 1st 2,000 miles running 80 psi front and rear. After that, I ran a max of 50 front and 60 rear. I didn't have another flat. That's like 7,500 flat free smiles.

Matt