I made chains for my 4300 as the R-4's would not allow regular chains to fit between the fenders and the sidewalls of the tires. I too, thought they needed to be high on the tire, and fit in the depression at the edge of the R-4 lugs. I bought the side chain, and the cross chain. Took the cross chain to a welder and had them torched to length, and made my own.I borrowed the heavy duty chain clincher from the local township garage. The cost was in the $200 range, I think, but would have to look up my receipts to tell for sure. If interested, I will dig that info out for you. They work real well (lots of snow and then heavy, thick ice last winter). I purchased the stuff at an industrial store that catered to local industry and truck users.