You will get between 30,000 to 40,000 miles out of a M50 rear tire & mounting it backwards. The reason for mounting it backwards is that a rear tire is ment to handle the drive force & not the brakeing force. By switching it backwards it will handle the front brakeing force. Also when you look at one backwards the tread pattern looks like other front tires. Holly has one on her trike & loves it. You won't be sorry with one. I have never heard of anyone not likeing the M50 on the front of there trike. Hope this helps. There is a LOT of tread on one of these tires.