I bought a pair of cable chains last October when we travelled through some mountains. Never used them. I did try putting them on the outside duals and had no trouble. They were $50, looks like $100 now after the Canadian dollar slipped. As someone mentioned they are not meant for travel more than a few km, or for speeds over 60 km/hr. It feels good to have them aboard and they are much lighter and less bulky than real chains. I carried real chains in my van for many years and never used them so these seem good enough.
Canadian Tire