The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.

W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.

Ergonomic Casters by Plate Size · 2-11/16" x 3-5/8" Top Plate · Up to 300 lb · Polyurethane

Plate sizes: 2-1/2 x 3-5/8, 2-11/16 x 3-5/8Bolt holes: 1-3/4 x 2-13/16Diameter: 3-1/2, 4, 5 inTread: 1-1/4 inCapacity: up to 300 lb

22 Series (To 325 Lb/Ea) polyurethane casters sized for warehouse carts on epoxy and smooth concrete. Expect top plates around 2-1/2 x 3-5/8, wheel diameters 3-1/2, 4, 5 in, and polyurethane treads. When floors see chemicals or washdowns, prefer sealed bearings and non-absorbent wheel compounds. For dual-wheel or wide treads, check fork clearance and swivel radius in tight aisles. These light-duty options cover everyday warehouse carts on epoxy and smooth concrete without jumping to extreme forged series.