I bought these for my 2011 polaris sportsman 550 so I could replace the low end maxxis tires that came on it. I was tired of flats and poor traction. These Artrax tires seem to be great. I haven't put much time on them but I can already tell a difference in how my atv rides. These have a much stiffer sidewall and carcass and have handled everything I've thrown at them so far. As soon as I can get some more spare cash, I'm going to get a set for the front.