I haven't noticed any loss of RPM on hill climbs at all. Not sure why that would be different for mine than yours. I have only had 4 rides with the new tires on. I have heard that if you have to many paddles on the rear, or to little, you can loose RPMs. Jared at Redline told me the 10 paddle rear haulers matched with the ITP Mud Lites on the front would be a good match. The jury is still out on this for me!

How many paddles did your friend have on the RZR? We were at Sand Lake Sunday, Monday and Tuesday, so I'm staying home this weekend. I wouldn't mind going riding sometime. I typically go to Sand Lake but I wanna go to Winchester some time.

Steve