Brown nylon tread is molded in, around and through slots in an aluminum wheel core. This mechanical tread locking system helps prevent tread bond failures under harsh operating conditions found in meat packing and food processing industries. A nylon wheel is recommended for applications requiring a high resistance to water, oils, gasoline, grease and certain salt solutions. Nylon is also resistant to paints and lacquers, cosmetic preparations, detergents, aerosol preparations, and animal and vegetable fats.