Confirm model or manufacturer part number 76600B
Heavy-duty platform carts like this one place the load-bearing responsibility on the cart instead of the driver
The source lists Stainless steel roller bearing
Model 284168
and capacity shown in the details
5" x 1-1/4" DuraLastomer Wheel - 700 lbs. Capacity Metal Casters Confirm model or manufacturer partProduct Overview 5" x 1 1 4" DuraLastomer Wheel The Duralastomer wheel is corrosion resistant, making it a great choice for applications that are frequently washed down. This replacement wheel is listed with wheel diameter 5", tread width 1 1 4", load capacity 700 Lbs., tread type Solid Cast Polyurethane Elastomer, Non Marking, and bearing type Plain Bore. Before ordering, verify the listed wheel dimensions, load capacity, bore or bearing, hub length,