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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.

BHP: 1-3/4″ × 2-7/8″, slotted to 3″
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: 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: 2-5/8” 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"
BHP: 2-7/16" x 4-15/16" slotted to 3-3/8" x 5-1/4"
(3″ Wide Casters), Industry-Standard
(3″ Wide Casters), Industry-Standard
BHP: 3-3/8" x 5-1/4" slotted to 4-1/8" x 6-1/8"
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"
BHP: 4-1/8" x 6" slotted to 4-1/2" x 6-1/8"
View All • 21 Plate Sizes
View All • 21 Plate Sizes
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Caster Wheel Materials & Selection Guide

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Polyurethane Casters · 700–1,250 lb

This collection holds Polyurethane On Steel Pu casters with metal and polyurethane wheels, built for shop carts, equipment, and material handling carts that move heavier loads. Casters in this collection range from 700 to 1,250 lb per caster. Wheels in this category range from 4 up to 8 inches in diameter with a 2 in tread width. The collection includes swivel and rigid models. Metal wheels roll with low effort and handle debris and heat. They are loud and can mark finished floors. Polyurethane (poly or urethane) treads are quiet, floor safe, and resist water and many chemicals. Match plate size, bolt pattern, and overall height before you order. Choose swivel casters when the cart must turn in place and rigid casters for straight travel. Read the listing for the exact wheel size, overall height, and mount shown. Confirm the load rating printed on the title before you order. Forged steel aisle: forged steel casters. Wheel hub: replacement wheels.

Shop by type

4 types

Wheel = wheel diameter · capacity is per caster.

1200 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 6" x 2" Polyurethane on Steel Swivel Caster - 1200 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
6" x 2" Polyurethane on Steel Swivel Caster – 1200 lb
Part # 30-S-620-PU-03
from $49.00
Volume pricing available
PolyurethanePlate
Load rating
1200 lbs
Size6" x 2"
Capacity1200 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeSwivel
More Details Less Details
Width 2"
Height 7-1/2"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -45°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 6" x 2" Polyurethane on Steel Swivel...
Shop Product
1000 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 5" x 2" Polyurethane on Steel Swivel Caster - 1000 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
5" x 2" Polyurethane on Steel Swivel Caster – 1000 lb
Part # 30-S-520-PU-03
from $46.00
Volume pricing available
PolyurethanePlate
Load rating
1000 lbs
Size5" x 2"
Capacity1000 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeSwivel
More Details Less Details
Width 2"
Height 6-1/2"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -40°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 5" x 2" Polyurethane on Steel Swivel...
Shop Product
700 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 4" x 2" Polyurethane on Steel Swivel Caster - 700 lb Capacity, 4 x 4-1/2 Top Plate Durastar
Ships in 1-3 Business Days
4" x 2" Polyurethane on Steel Swivel Caster – 700 lb
Part # 30-S-420-PU-03
from $41.00
Volume pricing available
PolyurethanePlate
Load rating
700 lbs
Size4" x 2"
Capacity700 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeSwivel
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -45°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 4" x 2" Polyurethane on Steel Swivel...
Shop Product
1200 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 6" x 2" Polyurethane on Steel Rigid Caster - 1200 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
6" x 2" Polyurethane on Steel Rigid Caster – 1200 lb
Part # 30-R-620-PU-03
from $48.00
Volume pricing available
PolyurethanePlate
Load rating
1200 lbs
Size6" x 2"
Capacity1200 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeRigid
More Details Less Details
Width 2"
Height 7-1/2"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -45°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 6" x 2" Polyurethane on Steel Rigid...
Shop Product
1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 8" x 2" Polyurethane on Steel Swivel Caster - 1250 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
8" x 2" Polyurethane on Steel Swivel Caster – 1250 lb · DuraStar 30 Series · Model 30-S-820-PU-03
Part # 30-S-820-PU-03
from $50.00
Volume pricing available
PolyurethanePlate
Load rating
1250 lbs
Size8" x 2"
Capacity1250 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeSwivel
More Details Less Details
Width 2"
Height 9-1/2"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -45°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 8" x 2" Polyurethane on Steel Swivel...
Shop Product
1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 8" x 2" Polyurethane on Steel Rigid Caster - 1250 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
8" x 2" Polyurethane on Steel Rigid Caster – 1250 lb
Part # 30-R-820-PU-03
from $49.00
Volume pricing available
PolyurethanePlate
Load rating
1250 lbs
Size8" x 2"
Capacity1250 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeRigid
More Details Less Details
Width 2"
Height 9-1/2"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -45°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 8" x 2" Polyurethane on Steel Rigid...
Shop Product
1000 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 5" x 2" Polyurethane on Steel Rigid Caster - 1000 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
5" x 2" Polyurethane on Steel Rigid Caster – 1000 lb
Part # 30-R-520-PU-03
from $45.00
Volume pricing available
PolyurethanePlate
Load rating
1000 lbs
Size5" x 2"
Capacity1000 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeRigid
More Details Less Details
Width 2"
Height 6-1/2"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -40°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 5" x 2" Polyurethane on Steel Rigid...
Shop Product
700 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 4" x 2" Polyurethane on Steel Rigid Caster - 700 lb Capacity, 4 x 4-1/2 Top Plate Durastar
Ships in 1-3 Business Days
4" x 2" Polyurethane on Steel Rigid Caster – 700 lb
Part # 30-R-420-PU-03
from $40.00
Volume pricing available
PolyurethanePlate
Load rating
700 lbs
Size4" x 2"
Capacity700 lbs
WheelPolyurethane
MountPlate 4" x 4-1/2"
TypeRigid
More Details Less Details
Width 2"
Height 5-5/8"
Bolt Pattern 2-5/8" x 3-5/8" slotted to 3" x 3"
Core Steel
Temp Range -45°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 4" x 2" Polyurethane on Steel Rigid...
Shop Product

Durastar polyurethane on steel casters by tread

Tread Core Wheel sizes Rated per caster Listed temperature Where it fits
Polyurethane Steel 4, 5, 6 and 8 in 700 to 1,250 lb -45°F to 180°F quiet, floor-friendly and long wearing

Ratings are for single casters of Durastar polyurethane on steel casters, from product fields [S1].

Wheel sizes

Wheel Treads Rated
4 x 2 in polyurethane 700 lb
5 x 2 in polyurethane 1,000 lb
6 x 2 in polyurethane 1,200 lb
8 x 2 in polyurethane 1,250 lb

Choosing Durastar polyurethane on steel casters

  1. Load: divide the loaded weight by three for a four-caster cart [S2]; at 1,250 lb each, Durastar polyurethane on steel casters suit a loaded cart of about 3,750 lb.
  2. Mount: most Durastar polyurethane on steel casters use a 4 x 4-1/2 in top plate; match the bolt holes on your frame to the plate before ordering.
  3. Floor: on Durastar polyurethane on steel casters, polyurethane protects finished floors and runs quietly; check the rating if the cart also crosses rough concrete.
  4. Rig: swivel and rigid Durastar polyurethane on steel casters are listed.

Related to Durastar polyurethane on steel casters: 4 x 2 in polyurethane casters, 5 x 2 in polyurethane casters and 8 x 2 in polyurethane casters.

Durastar polyurethane on steel casters questions

How much weight can Durastar polyurethane on steel casters carry?

Single Durastar polyurethane on steel casters are rated 700 to 1,250 lb; most fall between 1,000 and 1,250 lb.

What top plate do Durastar polyurethane on steel casters use?

Most Durastar polyurethane on steel casters use 4 x 4-1/2 in.

What wheel material is most common on Durastar polyurethane on steel casters?

Polyurethane leads on Durastar polyurethane on steel casters, rated 700 to 1,250 lb per caster.

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.

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