The MudSmith Gauge Wheel utilizes a patent protected open rim design. This open rim design reduces mud and debris buildup while being extremely durable. The modular construction allows every part to be field replaceable. MudSmith Hardware Kits includes everything necessary to convert old gauge wheels to MudSmith’s open rim design. The Cast Iron Bearing Hub eliminates wheel wobble, and cuts down on time spent changing bearings, in one complete, durable housing. The MudSmith Gauge Wheel Hardware Kit is available in 4.5″, 3″ and 2.5″ sizes, and is compatible with all brands and models of implement matching those measurements.