RUD ladder snow chains suitable for fitting to tyres 16 x 6.50 8RUD are a leading manufacturer of specialist high quality snow chains for many applications. These snow chains are suitable for fitting to lawn tractors, ride on mowers, compact lawn riders, garden trailers and other gardening equipment which requires a firm grip in icy or snowy conditions.Ladder snow chains are distinctive by how they appear on the surface of the tyre. The surface that makes contact with the road looks like a ladder with cross chains running perpendicular across the tyre.