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Polyurethane Casters on Iron · 800 to 1,250 lb Each

Wheels 4, 5, 6, 8 x 2 inPlate: 4 x 4-1/2 inCapacity: 800 to 1,250 lb each, sets of 4 rated 3,200 to 5,000 lb
Green polyurethane on iron casters for tool boxes, shop carts and fixtures. The iron core carries the load and the polyurethane tread protects concrete and epoxy floors and rolls quieter than steel. Singles are rated 800 lb at 4 in, 1,100 lb at 5 in, 1,200 lb at 6 in and 1,250 lb at 8 in.

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4 types

Wheel = wheel diameter · capacity is per caster.

Singles and sets

Wheel Single caster Set of 4
4 x 2 in 800 lb 3,200 lb
5 x 2 in 1,100 lb 4,000 lb
6 x 2 in 1,200 lb 5,000 lb (tool box kit)
8 x 2 in 1,250 lb 5,000 lb

From product titles and fields [S1]. The 4, 5 and 8 in sets pair braked swivels with rigids; the 6 in tool box kit is listed as rigid.

Why polyurethane on iron

An iron center does not flex under load, so the wheel holds its shape and rolls with little effort. The bonded tread gives a little over cracks and debris and does not chip concrete the way a steel wheel can. Listed temperature ranges top out at 180°F.

Set rating and singles

A set rating assumes all four casters touch the floor. On an uneven floor one caster can carry far more than a quarter of the load, so leave a margin [S2].

Green poly on iron caster questions

How much does a green poly on iron caster hold?

800 to 1,250 lb per caster, depending on size.

What plate do they use?

4 x 4-1/2 in.

What is in a set of 4?

The 4, 5 and 8 in sets pair braked swivels with rigid casters, rated 3,200 to 5,000 lb per set.

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.

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