I remember reading a post on another web site that said the API chains are really made for a combine, and that you can get replacement chain at any tractor supply store. The API chain lengths are 5.5 feet. The person who wrote the post said he bought a hundred foot roll for him and his buddies. I also remember something about the size of the chain or part number being stamped on the inside of the links, you probably want to check that to make sure you are getting the proper replacement. If you cant find replacement chains from API, it might be worth a shot checking this out. Hope this helps.