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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

Caster Wheel Materials & Selection Guide
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Phenolic Wheels
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Flat-free (Foam-filled)

Flat-free (Foam-filled)
Wheel Replacement Parts

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Caster Plate Mounting Hardware

Caster Plate Mounting Hardware
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Quick Change Caster Pads
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Caster Frames - Swivel & Rigid
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Sockets & T-nuts For Casters
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Expanding Rubber Adapter Kits
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Caster Shims & Weld Plates
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Furniture Glides
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Floor Truck Locks
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Swivel Locks
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Wheel Bearings
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3" x 1-1/4" Rubber Casters

Diameter: 3, 3-1/2, 4, 5 inTread: 1-1/4 inCapacity: up to 325 lb
Rubber casters here serve finished floors and quiet institutional carts. You will see wheel diameters 3, 3-1/2, 4, 5 in, rubber treads, and plate-mount frames across the SKUs listed below. Confirm stem length and thread pitch on stem mounts so the shoulder seats flush in the boss. Use kingpinless or heavy plate series when shock loads keep shearing kingpin races. These light-duty options cover everyday finished floors and quiet institutional carts without jumping to extreme forged series.

Shop by type

4 types

Wheel = wheel diameter · capacity is per caster.

325 lbs
TieredPricing
Durastar 5" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 325 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
5" x 1-1/4" Duratek Rubber Swivel Caster Top Plate – 325 lb
Part # 21-S-514-PPR-11
from $27.00
Volume pricing available
RubberPlate
Load rating
325 lbs
Diameter 5"
Capacity 325 lbs
Wheel Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 6-1/4"
Temp Range -20°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar 5" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 325 lb Capacity,...
Shop Product
300 lbs
TieredPricing
Durastar 4" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 300 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
4" x 1-1/4" Duratek Rubber Swivel Caster – 300 lb
Part # 21-S-414-PPR-11
from $25.00
Volume pricing available
Gray RubberPlate
Load rating
300 lbs
Diameter 4"
Capacity 300 lbs
Wheel Gray Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 5-1/8"
Temp Range -45°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar 4" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 300 lb Capacity...
Shop Product
250 lbs
TieredPricing
Durastar 3-1/2" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 250 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
3-1/2" x 1-1/4" Duratek Rubber Swivel Caster – 250 lb · Model 21-S-3514-PPR-11
Part # 21-S-3514-PPR-11
from $23.00
Volume pricing available
Gray RubberPlate
Load rating
250 lbs
Diameter 3-1/2"
Capacity 250 lbs
Wheel Gray Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 4-5/8"
Core Polyolefin
Temp Range -45°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar 3-1/2" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 250 lb Capacity...
Shop Product
225 lbs
TieredPricing
Durastar 3" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 225 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
3" x 1-1/4" Duratek Rubber Swivel Caster – 225 lb · Model 21-S-314-PPR-56
Part # 21-S-314-PPR-56
from $21.00
Volume pricing available
RubberPlate
Load rating
225 lbs
Diameter 3"
Capacity 225 lbs
Wheel Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 4-3/16"
Temp Range -45°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar 3" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 225 lb Capacity...
Shop Product
225 lbs
TieredPricing
Durastar 3" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 225 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
3" x 1-1/4" Duratek Rubber Swivel Caster – 225 lb · Model 21-S-314-PPR-11
Part # 21-S-314-PPR-11
from $21.00
Volume pricing available
RubberPlate
Load rating
225 lbs
Diameter 3"
Capacity 225 lbs
Wheel Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 4-3/16"
Temp Range -45°F to 180°F
Rig Type Swivel
Brake No Brake
Frame Zinc Plated Steel
Durastar 3" x 1-1/4" Duratek High Tech Rubber Swivel Caster - 225 lb Capacity...
Shop Product
325 lbs
TieredPricing
Durastar 5" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 325 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
5" x 1-1/4" Duratek Rubber Rigid Caster Top Plate – 325 lb
Part # 21-R-514-PPR-11
from $25.00
Volume pricing available
RubberPlate
Load rating
325 lbs
Diameter 5"
Capacity 325 lbs
Wheel Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 6-1/4"
Temp Range -20°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar 5" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 325 lb Capacity,...
Shop Product
300 lbs
TieredPricing
Durastar 4" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 300 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
4" x 1-1/4" Duratek Rubber Rigid Caster – 300 lb
Part # 21-R-414-PPR-11
from $23.00
Volume pricing available
Gray RubberPlate
Load rating
300 lbs
Diameter 4"
Capacity 300 lbs
Wheel Gray Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 5-1/8"
Temp Range -45°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar 4" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 300 lb Capacity...
Shop Product
250 lbs
TieredPricing
Durastar 3-1/2" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 250 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
3-1/2" x 1-1/4" Duratek Rubber Rigid Caster – 250 lb
Part # 21-R-3514-PPR-11
from $21.00
Volume pricing available
Gray RubberPlate
Load rating
250 lbs
Diameter 3-1/2"
Capacity 250 lbs
Wheel Gray Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 4-5/8"
Core Polyolefin
Temp Range -45°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar 3-1/2" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 250 lb Capacity...
Shop Product
225 lbs
TieredPricing
Durastar 3" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 225 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
3" x 1-1/4" Duratek Rubber Rigid Caster – 225 lb · Model 21-R-314-PPR-56
Part # 21-R-314-PPR-56
from $20.00
Volume pricing available
RubberPlate
Load rating
225 lbs
Diameter 3"
Capacity 225 lbs
Wheel Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 4-3/16"
Temp Range -45°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar 3" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 225 lb Capacity...
Shop Product
225 lbs
TieredPricing
Durastar 3" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 225 lb Capacity, Choose Top Plate Option Durastar
Ships in 1-3 Business Days
3" x 1-1/4" Duratek Rubber Rigid Caster – 225 lb · Model 21-R-314-PPR-11
Part # 21-R-314-PPR-11
from $20.00
Volume pricing available
RubberPlate
Load rating
225 lbs
Diameter 3"
Capacity 225 lbs
Wheel Rubber
Mount Plate
More Details Less Details
Width 1-1/4"
Height 4-3/16"
Temp Range -45°F to 180°F
Rig Type Rigid
Brake No Brake
Frame Zinc Plated Steel
Durastar 3" x 1-1/4" Duratek High Tech Rubber Rigid Caster - 225 lb Capacity...
Shop Product

Durastar Casters | Light-Medium Duty Top Plate Casters - 21 SERIES with Duratek Rubber - PPR Wheels

Product Features

  • Material Construction: Duratek Rubber - PPR for enhanced durability and smooth operation
  • Load Capacity: Designed for light to medium-duty applications, providing reliable performance
  • Wheel Design: PPR wheels offer superior wear resistance, floor protection, and smooth movement on various surfaces
  • Top Plate Sizes: Available in versatile sizes, ensuring compatibility with a wide range of applications
  • Applications: Ideal for light to medium-duty material handling, industrial carts, and equipment that require a durable yet smooth mobility solution

The Durastar Casters 21 SERIES offers an exceptional combination of strength, durability, and mobility with Duratek Rubber - PPR wheels. These top plate casters are engineered for light to medium-duty applications, offering smooth, easy movement for a variety of environments.

Whether you’re moving industrial equipment, carts, or other materials, the PPR wheels are specifically designed to provide enhanced floor protection and wear resistance, making them ideal for both indoor and outdoor use. Their superior performance ensures a long lifespan, even in demanding conditions.

With versatile top plate sizes, these casters are compatible with a wide range of systems, allowing you to use them across many different applications. The Duratek Rubber - PPR wheels provide a balance of strength and flexibility, making them a perfect choice for a variety of light to medium-duty tasks.

Ideal for use in industrial, commercial, and healthcare environments, Durastar Casters offer reliability and ease of use in any setting. Trust in their high-quality construction to support your mobility needs and ensure smooth operations.

Enhance Your Mobility Solutions Today

Upgrade your equipment's mobility with Durastar Casters' 21 SERIES Light-Medium Duty Casters. Delivering reliability, durability, and exceptional performance, these casters will optimize your material handling processes for a smoother, more efficient operation.

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