3-1/2″ x 1-1/4″ Casters · Light-Medium Cart Spec · 210 to 350 lb

This collection holds Hamilton 3-1/2 in x 1-1/4 in Casters with polyurethane, polyolefin and rubber wheels, built for shop carts, equipment, and material handling carts that move heavier loads. Casters in this collection range from 140 to 1,200 lb per caster. Wheels in this category range from 1 up to 5 inches in diameter with 1 to 1.312 in tread widths. The collection includes swivel, rigid, and brake models. Polyurethane (poly or urethane) treads are quiet, floor safe, and resist water and many chemicals. Polyolefin is light, low cost, and resists water and many chemicals. It is hard, so it is loud on rough floors. Rubber wheels are quiet, cushion the load, and protect floors. Soft rubber or TPR is the better pick when the floor has chips or grit. Match the stem size and thread before you order. Choose swivel casters when the cart must turn in place and rigid casters for straight travel. Polyurethane aisle: polyurethane casters. Wheel hub: replacement wheels.

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7 types

Rubber and polyurethane favor floor protection; phenolic and steel favor heavy capacity. Compare materials →

3-1/2″ x 1-1/4″ Casters: buying guide

3-1/2 x 1-1/4 in casters in polyurethane, rubber and polyolefin, 3-1/2 in wheels, rated 210 to 350 lb per caster.

Diameter 3-1/2 inTread 1-1/4 inPlate 3-1/8 x 4-1/8 in (most)210 to 350 lb per caster

3-1/2 x 1-1/4 in casters by tread

Tread	Core	Wheel sizes	Rated per caster	Listed temperature	Where it fits
Polyurethane	Polyolefin	3-1/2 in	250 to 300 lb	-30°F to 140°F	quiet, floor-friendly and long wearing
Rubber	Polyolefin	3-1/2 in	210 to 250 lb	-45°F to 180°F	cushioned and quiet on finished floors
Polyolefin		3-1/2 in	230 to 250 lb	-45°F to 180°F	wet and chemical areas, light to medium loads
TPR	Polyolefin	3-1/2 in	225 lb	-30°F to 140°F	non-marking, quiet on finished floors
Phenolic		3-1/2 in	350 lb	Up to 250°F	hard and easy rolling on smooth, dry floors
Nylon		3-1/2 in	300 lb	-40°F to 210°F	low rolling effort on smooth floors, handles wet areas
Cast iron		3-1/2 in	300 lb		heat, chips and heavy loads on rough floors

Ratings are for single casters of 3-1/2 x 1-1/4 in casters, from product fields [S1].

Choosing 3-1/2 x 1-1/4 in casters

Load: plan on three casters carrying a four-caster cart [S2]; at 250 lb each, a common rating here, that is about 750 lb, and the 350 lb top rating covers about 1,050 lb.
Mount: most 3-1/2 x 1-1/4 in casters use a 3-1/8 x 4-1/8 in top plate; 2-1/2 x 3-5/8 in and 2-3/8 x 3-5/8 in plates are listed too; check the bolt spacing on your frame against the plate size.
Floor: on 3-1/2 x 1-1/4 in casters, polyurethane, rubber and TPR are kinder to tile and finished floors; polyolefin, phenolic, nylon and cast iron roll easier under heavy loads on smooth concrete.
Rig: swivel and rigid 3-1/2 x 1-1/4 in casters are listed, with total lock brake, top lock brake and side lock brake options.

3-1/2 x 1-1/4 in casters questions

How much weight can 3-1/2 x 1-1/4 in casters carry?

Single 3-1/2 x 1-1/4 in casters are rated 210 to 350 lb; most fall between 230 and 250 lb.

What top plate do 3-1/2 x 1-1/4 in casters use?

Most 3-1/2 x 1-1/4 in casters use 3-1/8 x 4-1/8 in. Others listed: 2-1/2 x 3-5/8 in and 2-3/8 x 3-5/8 in.

What wheel material is most common on 3-1/2 x 1-1/4 in casters?

Polyurethane leads on 3-1/2 x 1-1/4 in casters, rated 250 to 300 lb per caster. Rubber is next at 210 to 250 lb.

Are replacement wheels sold for 3-1/2 x 1-1/4 in casters?

Yes. Wheel-only listings for 3-1/2 x 1-1/4 in casters are here, sized 3-1/2 in; match the bore and hub length to your axle.

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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