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.

4" x 1-1/4" Rubber Casters

Plate sizes: 2-1/2 x 3, 2-3/4 x 3-3/4Bolt holes: 1-3/4 x 2-7/8Diameter: 3-1/2, 4, 5 inTread: 1-1/4 inCapacity: up to 275 lb

2-1/2 x 3 inch top-plate casters for finished floors and quiet institutional carts. Expect wheel diameters 3-1/2, 4, 5 in, rubber treads, and capacities 240 to 275 lb. Match bolt-hole spacing or stem diameter to the frame before you standardize a fleet. When floors see chemicals or washdowns, prefer sealed bearings and non-absorbent wheel compounds. These light-duty options cover everyday finished floors and quiet institutional carts without jumping to extreme forged series.