i bought a set of 20x11x10 razr 2 for the rear. i love them. no one wants to get behind me. (as if they have choice cuz my xx is faster then almost all my friends quads anyway):lmao:. my brother has hole shot hd and hes switching to razr 2s after he seen mine in action. big differnce in acc and traction. i wont buy and thing alse again unless they come out with a razr 3. lol. they are expensive but are worth it. they go through anything and everything. i can slide better throw 4 foot high roosts in sand. there amazing. now i need front tires and i will be getting razr 2 for the front as well. they xx is a little wider which is hard in tight places but its ok.