I have to say NDT's rule, I have many years of experience with them in all types of condiotns, this is one of those areas where the driver will make all the difference, first of all, Follow the simple directions of tire pressure in the manule, AS these tires can be aired down to 15 pounds, and that is a tremendous thing about these tires they will perform all of there dutys in even these extreme conditions, Now chains are the best Michelins are just better tech, and a better tire, BUT like I said a driver will make the difference here, Practice where u can get pulled out by a truck your size or smaller, get the feel of the truck and do not just crash into a huge pile high center and blame the tires, in fact when U get stuck do not blame the tires, The 900's are the tire of choice because of there width in mud and snow, they will perform as awesome as can be expected, In fact i do have side by side comparison of 1100s ndts and the 14oos in mud and on a five ton the ndts were far superior, did not float and slide about, U want your tire to cut thru the snow or mud, and as for ice, all bets are off anytire, this is where U as a driver will show how much U think about the area U are driving in, always get out and inspect the area if it looks awesome i mean hazerdas, Your truck will be hampered by hieght only, fell the gears ,low is not always the best, momentum and rpm's are sometimes what U need, air em down to 25 to 30 and start there, be a smooth driver , the straight 6 is the engine of choice here and u have it for even slow torque, But no truck is beyond getting stuck, how stuck U get depends on U, as long as no one gets hurt getting stuck is awesome too.....If U are going into this with idea of doing some serious driving in rough conditons make sure U have a back up vehicle to get U out....all the best enjoy and learn, feel the truck, it works....Randy