Swivel bearing features 3-1/4" dia. load race and coined smooth raceways are heat-treated to increase wear. Rugged roller bearing features hardened and ground spanner bushing for extra strength. Pressure fitting in swivel and recessed head of hollow axle. Aluminum enamel finish. Top plate measures 4-1/2 x 6-1/4". Bolt hole centers 3-3/8 x 5-1/4", slotted 2-7/16 x 4-15/16". FOB Shipping Point. For a variety of wheels do a search for: Wheel Description
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