The tire these chains are wrapped around is about four feet tall and goes on a piece of heavy equipment weighing about ten tons. It would be normal to assume that tires that large on something that heavy would not require any help in getting traction, but that assumption would be incorrect. This equipment operates in quite a bit of mud and water on slippery rock. The chains provide the grip needed to keep the equipment moving and they can be heard from quite a distance. I like the patterns made by the interlocking links.