rocky mountain atv. free shipping on all orders over 100 dollars and they have the lowest prices ive found anywhere. you can go to your local tire dealer and they should mount them for you for a low price.
I just put new tires on my 425 (rears) got brand new ones for $70 each, Carlisles, and mounted them myself, not easy but did it and they ride great. I get them from a wholesaler and can get the same for you.
by the way bolt pattern seemed to be different than anything else