Ladder tire chains are also know as "Road Chains". They are recommended for the following conditions: -worn tires -used on pavement or concrete -turf style tires Ladder tire chains are not recommended for deep lug tires, since the crosschain will settle between the tread lugs. Cross Chain Thickness: tire width up 16.9 are 3/8 inch thick. 18.4 and larger are 7/16. V-bar are great on hills, ice and hard packed conditions. The v-bar are also known as a wear bar, since they significantly extend the life of the chains. They are not recommended on pavement since they can damage the surface it the tires begin to spin. Fits: 8.3-24 10.5/80-18 12-16.5 280/70R20 300/70R20 315/75D76