Okay need help from those with lots more experiance than me. Usually because am retired just don't go out when it is snowy and icy out. Sometimes cannot help it though have to. Now I have Michelin XPS traction treads on the rear and that helps a lot. There is 2 pretty step grades to get over to get home from town. Last time it was packed snow and ice and before plowed almost did not get up them(barely topped out before losing traction and coming to a stop, LUCKY). I would have done better as I had just got home the day before after towing the 5er and forgot to air down the tires to the unloaded pressures, OOPS. Ones of those deals supposed to get only 1" or less for the day and got 4 inches in a hour, caught everyone by surprise. Guestion if i chained up the rear dually should do all 4 tires or just the outsides? If I do the insides also how do you get the chains tight without chain tighteners? Thanks everybody.