4 Inch Solid Polyurethane Wheel Casters

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.

Tread	Core	Wheel sizes	Rated per caster	Listed temperature	Where it fits
Polyurethane		4 in	350 lb	-45°F to 180°F	quiet, floor-friendly and long wearing

Tread

Core

Wheel sizes

Rated per caster

Listed temperature

Where it fits

Polyurethane

4 in

350 lb

-45°F to 180°F

quiet, floor-friendly and long wearing

Choosing 4 in solid polyurethane casters

Load: divide the loaded weight by three for a four-caster cart [S2]; at 350 lb each, 4 in solid polyurethane casters suit a loaded cart of about 1,050 lb.

Mount: most 4 in solid polyurethane casters use a 3-1/8 x 4-1/8 in top plate; check the bolt spacing on your frame against the plate size.

Floor: on 4 in solid polyurethane casters, polyurethane protects finished floors and runs quietly; check the rating if the cart also crosses rough concrete.

Rig: swivel and rigid 4 in solid polyurethane casters are listed.

Related to 4 in solid polyurethane casters: industrial casters.

4 in solid polyurethane casters questions

How much weight can 4 in solid polyurethane casters carry?

Single 4 in solid polyurethane casters are rated 350 lb.

What top plate do 4 in solid polyurethane casters use?

Most 4 in solid polyurethane casters use 3-1/8 x 4-1/8 in.

What wheel material is most common on 4 in solid polyurethane casters?

Polyurethane leads on 4 in solid polyurethane casters, rated 350 lb per caster.

Jordan Wilson, CasterHQ · reviewed October 20, 2026 · 844-439-4335 · info@casterhq.com

Sources

[S1] CasterHQ product fields (rated load, diameter, width, wheel and core material, temperature range, mount) and product descriptions for the items on this page, pulled October 20, 2026.

[S2] Preferred Equipment casters and wheels quick guide PDF (prefeq.com): load sizing on one less caster, wheel types and floor notes.

BHP: 1-3/4″ × 2-7/8″, slotted to 3″

BHP: 1-3/4″ × 2-15/16″ slotted to 2-3/8″ × 3-3/8″

BHP: 2-5/8” X 3-5/8” (Slotted to 3” x 3”)

BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"

(3″ Wide Casters), Industry-Standard

BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"

BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"

View All • 21 Plate Sizes

Plate Casters

Stem Casters

Stainless Casters

Ergonomic Casters

Leveling Casters

4 Inch Solid Polyurethane Wheel Casters

4 in solid polyurethane casters by tread

Choosing 4 in solid polyurethane casters

4 in solid polyurethane casters questions

Sources