Up to 350 lbs
Up to 7,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
Shock absorbing
Outdoor / rough terrain
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Browse all specialty caster types
All measurements indicate the wheel diameter by the tread width.
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.
Plate dimensions shown are overall mounting plate size.
When replacing existing casters, select the closest plate size and verify bolt-hole compatibility.
BHP = Bolt Hole Pattern, shown under each plate.
Wheel = wheel diameter · capacity is per caster.
























| Tread | Core | Wheel sizes | Rated per caster | Listed temperature | Where it fits |
|---|---|---|---|---|---|
| Polyurethane | Steel and Polyolefin | 4 to 12 in | 700 to 2,500 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 | |
| Rubber | 4 to 12 in | 500 to 1,300 lb | -45°F to 180°F | cushioned and quiet on finished floors | |
| Ductile iron | Steel | 4 to 12 in | 1,500 to 2,500 lb | -45°F to 800°F | heavy loads with better impact strength than cast iron |
| Phenolic | 4, 5, 6, 8 and 12 in | 800 to 2,500 lb | Up to 250°F | hard and easy rolling on smooth, dry floors | |
| Semi-steel | 4, 5, 6, 8 and 10 in | 700 to 2,500 lb | -45°F to 800°F | rough floors, heat and heavy loads |
Ratings are for single casters of Durastar heavy duty casters, from product fields [S1].
| Wheel | Treads | Rated |
|---|---|---|
| 4 x 2 in | polyurethane, phenolic and rubber | 450 to 1,500 lb |
| 5 x 2 in | polyurethane, nylon and phenolic | 500 to 1,500 lb |
| 6 x 2 in | polyurethane, nylon and phenolic | 600 to 2,000 lb |
| 6 x 3 in | polyurethane, ductile iron and nylon | 750 to 2,500 lb |
| 8 x 2 in | polyurethane, nylon and phenolic | 675 to 2,000 lb |
| 8 x 3 in | polyurethane, ductile iron and rubber | 900 to 2,500 lb |
| 10 x 3 in | nylon, semi-steel and rubber | 1,100 to 2,500 lb |
| 12 x 3 in | polyurethane, rubber and ductile iron | 1,300 to 2,500 lb |
Related to Durastar heavy duty casters: industrial casters, S40 series and 3 in wide tread plate casters.
Single Durastar heavy duty casters are rated 500 to 2,500 lb; most fall between 1,000 and 2,500 lb.
Most Durastar heavy duty casters use 4 x 4-1/2 in. Other plates on Durastar heavy duty casters: 4-1/2 x 6-1/4 in and 4-1/2x6-1/4 in.
Polyurethane leads on Durastar heavy duty casters, rated 700 to 2,500 lb per caster. Among Durastar heavy duty casters, nylon is next at 800 to 2,500 lb.
Jordan Wilson, CasterHQ · reviewed October 20, 2026 · 844-439-4335 · info@casterhq.com
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