Abstract: A device for mounting 3-railer snow chains having three runners on a set of double truck tires which are mounted on an outside wheel and an inside wheel. The device includes a non-elastic strap, a first wheel hook connected to a first end of the non-elastic strap for hooking the device to the inside wheel rim of the inside wheel, and a second wheel hook connected to a second end of the non-elastic strap for hooking the device to the outside wheel rim of the outside wheel. The device also includes a tightening mechanism such as a ratchet device for tightening the strap on the tires, and three chain hooks connected along the length of the strap. Each of the three chain hooks are positioned to engage one of the runners of the 3-railer snow chains. By driving forward or otherwise rotating the tire, the snow chains are tightly wrapped around the tire.