Polyurethane Rigid Casters

Diameter: 3 to 16 inTread: 1-1/4, 2 and 3 inPlate: 4 x 4-1/2 in (most)Capacity: 250 to 17,600 lb per caster

This page lists polyurethane rigid casters with polyurethane, nylon and cast iron treads. Polyurethane on cast iron and polyolefin cores is the most common tread here, rated 275 to 11,300 lb per caster in 3 to 16 in. Ratings by tread: nylon 800 to 2,500 lb and cast iron 1,300 to 2,700 lb. Sets of 4 list 1,200 to 5,000 lb combined. Brands: Hamilton, Durastar, Colson and Albion.

Polyurethane rigid casters by tread

Tread	Core	Wheel sizes	Rated per caster	Listed temperature	Where it fits
Polyurethane	Cast iron and Polyolefin	3 to 16 in	275 to 11,300 lb	-45°F to 180°F	quiet, floor-friendly and long wearing
Nylon		4, 5, 6, 8 and 10 in	800 to 2,500 lb	Up to 180°F	low rolling effort on smooth floors, handles wet areas
Cast iron		4, 5, 6 and 8 in	1,300 to 2,700 lb	-40°F to 180°F	heat, chips and heavy loads on rough floors

Ratings are for single casters of polyurethane rigid casters, from product fields [S1].

Wheel sizes

Wheel	Treads	Rated
3 x 1-1/4 in	polyurethane	250 to 400 lb
4 x 1-1/4 in	polyurethane	275 to 350 lb
4 x 2 in	polyurethane, nylon and cast iron	450 to 1,300 lb
5 x 1-1/4 in	polyurethane	300 to 350 lb
5 x 2 in	polyurethane, nylon and cast iron	600 to 1,800 lb
6 x 2 in	polyurethane, nylon and cast iron	620 to 2,700 lb
8 x 2 in	polyurethane, nylon and cast iron	620 to 3,000 lb
8 x 3 in	polyurethane, nylon and cast iron	800 to 4,800 lb

Choosing polyurethane rigid casters

Load: divide the loaded weight by three for a four-caster cart [S2]. A 1,800 lb caster from this page then suits about 5,400 lb, and the strongest at 17,600 lb about 52,800 lb.
Mount: most polyurethane rigid casters use a 4 x 4-1/2 in top plate; 4-1/2 x 6-1/4 in and 5-1/4 x 7-1/4 in plates are listed too; match the bolt holes on your frame to the plate before ordering.
Floor: on polyurethane rigid casters, polyurethane is kinder to tile and finished floors; nylon and cast iron roll easier under heavy loads on smooth concrete.
Rig: rigid and swivel polyurethane rigid casters are listed, with side lock brake and total lock brake options.

Related: polyurethane casters.

Polyurethane rigid casters questions

How much weight can polyurethane rigid casters carry?

Single polyurethane rigid casters are rated 250 to 17,600 lb; most fall between 750 and 1,800 lb.

What top plate do polyurethane rigid casters use?

Most polyurethane rigid casters use 4 x 4-1/2 in. Others listed: 4-1/2 x 6-1/4 in and 5-1/4 x 7-1/4 in.

What wheel material is most common on polyurethane rigid casters?

Polyurethane leads on polyurethane rigid casters, rated 275 to 11,300 lb per caster. Nylon is next at 800 to 2,500 lb.

How long do polyurethane rigid casters take to ship?

Lead time on polyurethane rigid casters depends on brand and model: Hamilton builds many of its models here to order, typically 4 to 6 weeks, and Hamilton models stocked for Pronto Ship go out faster.

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.
[S3] Hamilton Caster catalog, PRONTO star marks for stocked models (hamiltoncaster.com/catalog.pdf), checked October 20, 2026.

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