Spring Deflection to 125 lbs.

Diameter: 3 to 5 inTread: 1-1/4 inPlate: 2 x 5-3/8 inCapacity: 300 to 350 lb per caster

This page lists medium duty spring loaded casters with rubber and polyurethane treads. Rubber is the most common tread here, rated 300 to 350 lb per caster in 3, 4 and 5 in. Ratings by tread: polyurethane 300 lb.

Medium duty spring loaded casters by tread

Tread	Core	Wheel sizes	Rated per caster	Listed temperature	Where it fits
Rubber		3, 4 and 5 in	300 to 350 lb		cushioned and quiet on finished floors
Polyurethane		3 in	300 lb	-45°F to 180°F	quiet, floor-friendly and long wearing

Ratings are for single casters of medium duty spring loaded casters, from product fields [S1].

Wheel sizes

Wheel	Treads	Rated
3 x 1-1/4 in	rubber and polyurethane	300 lb
4 x 1-1/4 in	rubber	350 lb
5 x 1-1/4 in	rubber	350 lb

Choosing medium duty spring loaded casters

Load: plan on three casters carrying a four-caster cart [S2]; medium duty spring loaded casters rated 350 lb each then carry about 1,050 lb.
Mount: most medium duty spring loaded casters use a 2 x 5-3/8 in top plate; check the bolt spacing on your frame against the plate size.
Floor: on medium duty spring loaded casters, rubber and polyurethane protect finished floors and run quietly; check the rating if the cart also crosses rough concrete.

Related to medium duty spring loaded casters: spring loaded casters and spring wheels.

Medium duty spring loaded casters questions

How much weight can medium duty spring loaded casters carry?

Single medium duty spring loaded casters are rated 300 to 350 lb.

What top plate do medium duty spring loaded casters use?

Most medium duty spring loaded casters use 2 x 5-3/8 in.

What wheel material is most common on medium duty spring loaded casters?

Rubber leads on medium duty spring loaded casters, rated 300 to 350 lb per caster. Among medium duty spring loaded casters, polyurethane is next at 300 lb.

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"

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