I have an 07' WR450 with the crappy stock tires and I am looking to change them. I ride mostly hard pack, AZ desert. What tire is the hot setup, the desert IT with the IS up front or the 739 with the 756F RR or any combination of those? What size rear are you running, 110 or 120? The 120 seems VERY wide. Thanks in advance for any and all input. BRIDGESTONE 403/404 COMBO ROCKS! = BIKE WILL BE MUCH MEANER IN OUR DESERT TERRAIN! STAY WITH 110 IN REAR FOR BEST HANDLING, 120 WOULD BE SERIOUS OVERKILL WITH THESE BAD BOYS AND YOU WILL SACRIFICE AGILITY.