I guess, first of all I have yet to see a fourwheeler with chains, EVER. I have seen hunters with lesser equipped rigs using them in mud and snow with some sucess, but this was shallow stuff, where digging to the bottom was safe. For deep snow, they would just get you stuck. Not sure about mud, then again never seen them used. Best off with an agressive Mud terrain tire, and air down. I lived at over 11,000ft until February one year, and followed behind snow cats. I would guess that alot of damage would be done to trails, with the limited contact patch, and agressive digging. Cant emagine what transition from mud to rock would be like <img src="/forums/images/graemlins/shocked.gif" alt="" /> I would also guess it might be hard on the drivetrane. Bring em to Colorado, and we can experiment, with winter just ending in July, we should be able to find PLENTY of snow <img src="/forums/images/graemlins/smile.gif" alt="" />