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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 · 1,200–1,250 lb

This collection holds Heavy Duty Solid Polyurethane On Glass Filled Nylon Hu casters, built for shop carts, equipment, and material handling carts that move heavier loads. Casters in this collection range from 1,200 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. Polyurethane (poly or urethane) treads are quiet, floor safe, and resist water and many chemicals. Nylon rolls easily, resists water and many chemicals, and is hard, so it is loud on rough floors. Softer polyurethane or soft rubber or TPR tread is the better pick when the floor has chips or grit. 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. Polyurethane aisle: polyurethane casters. Wheel hub: replacement wheels.

Shop by type

4 types

Wheel = wheel diameter · capacity is per caster.

1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 8" x 2" HD Solid Polyurethane on Glass-filled Nylon 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 Swivel Caster – 1250 lb
Part # 30-S-820-HU-03
from $50.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1250 lbs
Size8" x 2"
Capacity1250 lbs
WheelSolid Polyurethane
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"
Temp Range Up to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 8" x 2" HD Solid Polyurethane on...
Shop Product
1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 6" x 2" HD Solid Polyurethane on Glass-filled Nylon Swivel Caster - 1250 lb Capacity, 4 x 4-1/2 Top Plate Durastar
Ships in 1-3 Business Days
6" x 2" Polyurethane on Nylon Swivel Caster – 1250 lb
Part # 30-S-620-HU-03
from $49.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1250 lbs
Size6" x 2"
Capacity1250 lbs
WheelSolid Polyurethane
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"
Temp Range Up to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 6" x 2" HD Solid Polyurethane on...
Shop Product
1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 5" x 2" HD Solid Polyurethane on Glass-filled Nylon Swivel Caster - 1250 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
5" x 2" Polyurethane on Nylon Swivel Caster – 1250 lb
Part # 30-S-520-HU-03
from $46.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1250 lbs
Size5" x 2"
Capacity1250 lbs
WheelSolid Polyurethane
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"
Temp Range Up to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 5" x 2" HD Solid Polyurethane on...
Shop Product
1200 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 4" x 2" HD Solid Polyurethane on Glass-filled Nylon Swivel Caster - 1200 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
4" x 2" Polyurethane on Nylon Swivel Caster – 1200 lb
Part # 30-S-420-HU-03
from $41.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1200 lbs
Size4" x 2"
Capacity1200 lbs
WheelSolid Polyurethane
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"
Temp Range Up to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 4" x 2" HD Solid Polyurethane on...
Shop Product
1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 8" x 2" HD Solid Polyurethane on Glass-filled Nylon 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 Nylon Rigid Caster – 1250 lb
Part # 30-R-820-HU-03
from $49.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1250 lbs
Size8" x 2"
Capacity1250 lbs
WheelSolid Polyurethane
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"
Temp Range Up to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 8" x 2" HD Solid Polyurethane on...
Shop Product
1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 6" x 2" HD Solid Polyurethane on Glass-filled Nylon Rigid Caster - 1250 lb Capacity, 4 x 4-1/2 Top Plate Durastar
Ships in 1-3 Business Days
6" x 2" Polyurethane on Nylon Rigid Caster – 1250 lb
Part # 30-R-620-HU-03
from $48.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1250 lbs
Size6" x 2"
Capacity1250 lbs
WheelSolid Polyurethane
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"
Temp Range Up to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 6" x 2" HD Solid Polyurethane on...
Shop Product
1250 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 5" x 2" HD Solid Polyurethane on Glass-filled Nylon Rigid Caster - 1250 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
5" x 2" Polyurethane on Nylon Rigid Caster – 1250 lb
Part # 30-R-520-HU-03
from $45.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1250 lbs
Size5" x 2"
Capacity1250 lbs
WheelSolid Polyurethane
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"
Temp Range Up to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar Medium Heavy Duty 30 Series - 5" x 2" HD Solid Polyurethane on...
Shop Product
1200 lbs
TieredPricing
Durastar Medium Heavy Duty 30 Series - 4" x 2" HD Solid Polyurethane on Glass-filled Nylon Rigid Caster - 1200 lb Capacity, 4 x 4-1/2 Top Plate | Choose Bearing Options Durastar
Ships in 1-3 Business Days
4" x 2" Polyurethane on Nylon Rigid Caster – 1200 lb
Part # 30-R-420-HU-03
from $40.00
Volume pricing available
Solid PolyurethanePlate
Load rating
1200 lbs
Size4" x 2"
Capacity1200 lbs
WheelSolid Polyurethane
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"
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" HD Solid Polyurethane on...
Shop Product

Durastar polyurethane on glass-filled nylon casters by tread

Tread Core Wheel sizes Rated per caster Listed temperature Where it fits
Polyurethane 4, 5, 6 and 8 in 1,200 to 1,250 lb Up to 180°F quiet, floor-friendly and long wearing

Ratings are for single casters of Durastar polyurethane on glass-filled nylon casters, from product fields [S1].

Wheel sizes

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

Choosing Durastar polyurethane on glass-filled nylon casters

  1. Load: plan on three casters carrying a four-caster cart [S2]; Durastar polyurethane on glass-filled nylon casters rated 1,250 lb each then carry about 3,750 lb.
  2. Mount: most Durastar polyurethane on glass-filled nylon casters use a 4 x 4-1/2 in top plate; measure bolt hole centers on the old plate and compare.
  3. Floor: on Durastar polyurethane on glass-filled nylon 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 glass-filled nylon casters are listed.

Related to Durastar polyurethane on glass-filled nylon casters: 5 x 2 in polyurethane casters, 6 x 2 in polyurethane casters and 8 x 2 in polyurethane casters.

Durastar polyurethane on glass-filled nylon casters questions

How much weight can Durastar polyurethane on glass-filled nylon casters carry?

Single Durastar polyurethane on glass-filled nylon casters are rated 1,200 to 1,250 lb.

What top plate do Durastar polyurethane on glass-filled nylon casters use?

Most Durastar polyurethane on glass-filled nylon casters use 4 x 4-1/2 in.

What wheel material is most common on Durastar polyurethane on glass-filled nylon casters?

Polyurethane leads on Durastar polyurethane on glass-filled nylon casters, rated 1,200 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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