Best set up I've found so far for my 2012 WR is a Maxxis Maxx cross IT 120/100x18 rear and Maxxis Maxx cross EN 90/90x21 front. I've got about 300 to 400km on the pair and am very pleased. I had two very muddy races right after I mounted the tires and they gave me a lot more confidence coming into off camber corners and on slick side hills, still no complaints in the dryer conditions now. I couldn't get the stock front tire off fast enough, it probably has 80% life left. Do you know what the difference between the Maxxis Desert IT and the Max Cross IT?