i just didn't like the way the bike cantilevers up onto the edge of the tread. you really still have decent contact patch but those tires are not meant to be used like that. pretty sure the bike actually lifts up a bit. go on youtube and do a search to find the Goldwing with the car tire. you'll know the one i mean, cause the guy mounted a camera to the bottom of his bike, aiming backwards and then proceeds to run an obstacle course so you can the how the tire acts. pretty scary if you ask me, but like i said, i know a few guys that swear by them and they certainly RIDE their machines.