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.

Under 350 lbs. each
351–675 lbs. each
676–1,250 lbs. each
1,251–2,000 lbs. each
2,001–4,000 lbs. each
4,001–7,500 lbs. each
7,501–10,000 lbs. each
10,001–15,000 lbs. each
15,001–20,000 lbs. each
20,001–30,000 lbs. each
30,000+ lbs. each

3.5" x 1.25" Rubber Casters

Plate sizes: 2-1/2 x 3-5/8, 2-11/16 x 3-5/8Bolt holes: 1-3/4 x 2-13/16Diameter: 2-1/2, 3-1/2 inTread: 1-1/4 inCapacity: up to 250 lb

22 Series (To 325 Lb/Ea) rubber casters sized for finished floors and quiet institutional carts. You will see top plates around 2-1/2 x 3-5/8, wheel diameters 2-1/2, 3-1/2 in, and rubber treads across the SKUs listed below. Confirm stem length and thread pitch on stem mounts so the shoulder seats flush in the boss. For dual-wheel or wide treads, check fork clearance and swivel radius in tight aisles.