Up to 350 lbs
Up to 7,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
Shock absorbing
Outdoor / rough terrain
View All Specialty Casters
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 wheel.
























| Tread | Core | Wheel sizes | Rated per wheel | Listed temperature | Where it fits |
|---|---|---|---|---|---|
| Ductile iron | Steel | 4 to 12 in | 1,500 to 7,000 lb | -20°F to 800°F | heavy loads with better impact strength than cast iron |
| Semi-steel | 4 to 12 in | 425 to 3,000 lb | -45°F to 800°F | rough floors, heat and heavy loads | |
| Cast iron | 4, 5, 6 and 8 in | 350 to 2,500 lb | -45°F to 800°F | heat, chips and heavy loads on rough floors |
Ratings are for single wheels of Durastar steel wheels SS, DS, VG & DVG, from product fields [S1].
| Wheel | Treads | Rated |
|---|---|---|
| 4 x 2 in | ductile iron, cast iron and semi-steel | 700 to 1,500 lb |
| 5 x 2 in | ductile iron, semi-steel and cast iron | 1,000 to 1,500 lb |
| 6 x 2 in | cast iron, semi-steel and ductile iron | 1,200 to 2,000 lb |
| 6 x 2-1/2 in | ductile iron, cast iron and semi-steel | 1,800 to 3,500 lb |
| 6 x 3 in | ductile iron, cast iron and semi-steel | 2,500 to 6,000 lb |
| 8 x 2 in | cast iron, semi-steel and ductile iron | 1,400 to 2,000 lb |
| 8 x 2-1/2 in | ductile iron, cast iron and semi-steel | 1,800 to 4,000 lb |
| 8 x 3 in | ductile iron, cast iron and semi-steel | 2,500 to 6,000 lb |
Related to Durastar steel wheels SS, DS, VG & DVG: caster wheels, SS and DS.
Single Durastar steel wheels SS, DS, VG & DVG are rated 350 to 7,000 lb; most fall between 1,500 and 4,000 lb.
Ductile iron leads on Durastar steel wheels SS, DS, VG & DVG, rated 1,500 to 7,000 lb per wheel. Among Durastar steel wheels SS, DS, VG & DVG, semi-steel is next at 425 to 3,000 lb.
Jordan Wilson, CasterHQ · reviewed October 20, 2026 · 844-439-4335 · info@casterhq.com
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