Just returned from second trip to HM, 4 days, 3 rain. 2012 still all stock except for the 2 uni filters. Springs are up to third notch front and back and had very little bottoming out. Stock tires are ok for normal hill climbs but did have a problem climbing big rocks at top of some hills. 800 with big horns was able to get over where I just spun tires, also on wet slanted trails or rocks I would slide off and again the other 2 guys with big horns had no trouble. Before anyone mentions it there was no power problem, used low range on steep hills and always had power to spare. 2 days buffalo mtn., 1 day bearwallow and 1 day rockhouse. Liked buffalo mtn the best out of the 3 and there was not as much hardpack so stock tires handled better. Rode mostly blue and black trails and kept up with commander 1000 and rzr 800 except for the one time at top of hill I had to use winch because tires wouldn't grip. I'm blaming tires but it may be my skill level as I am 68 yo. Have been to HM twice, durhamtown, Adventure world, royal blue, coal creek and Brimstone and have had no problems with 570 going anywhere, it will go with the best of them.