4-inch Wheels

Four-inch wheels are standard on industrial platform trucks, shop carts, mobile workbenches, packing stations, tool carts, wire shelving units, parts bins, and medium-duty material handling equipment. They are one of the most popular wheel sizes in warehouse and manufacturing environments.

Individual 4 inch wheels are rated from 200 to 1,200 lbs depending on material, tread width, and core construction. A four-wheel cart equipped with 4 inch wheels can handle total loads from 800 to nearly 5,000 lbs. Select wheels rated at least 30% above the calculated per-wheel load for reliability under dynamic conditions.

For concrete warehouse floors, polyurethane is the most popular choice at this size. It provides excellent load capacity, abrasion resistance, and low rolling resistance on concrete while protecting the floor surface from damage. Nylon handles the highest loads but offers no shock absorption. Rubber delivers the quietest ride and best vibration dampening but at lower load ratings.

Yes, as long as the diameter, tread width, bore size, and any bearing specifications match your current wheel. Our 4 inch wheels are replacement components designed to drop into standard caster forks and rigs. Measure your existing wheel or reference your caster model number to confirm the correct specifications.

The 4 inch diameter provides a clear ergonomic advantage over smaller wheels. Larger circumference means lower rolling resistance, which translates to less physical effort for workers pushing loaded carts across concrete, epoxy, and tile floors. Four-inch wheels also cross expansion joints, dock plates, elevator gaps, and small debris more easily than 2 or 3 inch alternatives, reducing jarring stops and tipped loads. For operations where carts move constantly throughout a shift, that improved rollability directly impacts worker fatigue and throughput.

Our 4 inch replacement wheel inventory covers a full spectrum of materials including polyurethane, rubber, nylon, phenolic, thermoplastic, and cast iron. Each wheel is sold individually. Match the diameter, bore size, tread width, and bearing type to your existing caster assembly for a seamless replacement.