I put a new set of tires on my quad today. I ordered Duro Power Grips from Rocky Mtn ATV and had them mounted at Steve Shannon in Mountain Top. I read lots of reviews about them and they sounded good. They are 6 ply radials and the tread pattern looks a lot like Bighorns. I went up in size from 25-8-12 to 26-9 -12 on the fronts and 25-10-12 on the backs to 26-11-12. They look really aggresive and are a lot heavier then the factory tires I took off. I hope I have good luck with them!