Recognizing that most manufacturers of dedicated snow tires recommend that they be used on "all-4 wheels", (for passenger cars of course), does anyone know what the official word is for dual rear wheel pickups? I can tell you that my RWD truck is already a white-knuckle affair on snow-covered roads and any handling issues as a result of putting snow tires on the rear wheels only, might be rather insignificant. With winter approaching, I'm evaluating all my options for my RWD CTD truck, and any alternatives to the assortment of tire chains I've depended on in the past.