Mudsmith has become the go-to brand of open-rim gauge wheels in North America because of their highly robust, quality construction. Their open-rim design has proven to be excellent for shedding mud. The rubber in MudSmith tires is thicker and lasts longer than other brands, yet they still have a softness or pliability to cushion the soil (unlike some brands that are rubber but have little or no air cavity, and are hard as a rock). Available with 3 different bearings to match your planter: bolt-thru, roll-pin, and set-screw types. Gauge-wheel drills, such as JD’s 50/60/90/Pro, Case’s PD-500, New Holland’s P-2080/2085, and Case’ SDX, use bolt-thru type bearings.