Tires! Your not kidding that Tires make a huge difference. This is the one thing, and easy one, that can make a HUGE difference.
Got to see this first hand during a recent trail ride. There was a fair amount of snow on the ground and one H1 had GSA's. Everyone plowed through all day long except for this poor bastard (jk
). Scrap the GSA ASAP if you plan any off-roading.
2001 H1 Opentop
Former 03 H2 Adventure Series
Homepage:
http://www.hummerh1.net