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4" x 2" Polyurethane on Aluminum Swivel & Rigid Caster – 4,000 lb | CasterHQ

Wheel
4" x 2"
Capacity
4000 lbs
Overall Height
5-5/8"
Plate Size
4" x 4-1/2"
In Stock · Ships 1-2 Business Days
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Business Purchasing
  • Purchase orders accepted for approved accounts
  • Net 30 terms for qualified businesses
  • ACH, credit card, and tax-exempt ordering
  • Bulk and contract pricing on fleet quantities
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Product Overview
At a glance
Load capacity4000 lbs
Wheel4" × 2" Polyurethane
MountPlate — 4" x 4-1/2"
TypeRigid
Overall height5-5/8"
TemperatureUp to 180°F

4" x 2" Orange Sirius Heavy Duty Donut Polyurethane on Aluminum Wheel - 2 Swivel Caster 2 Fixed Caster Set of 4 - Plate Size: 4" x 4-1/2" - Capacity: 4,000 lbs Per Set of 4


Plate Size: 4" x 4-1/2"
3-1/4

CasterHQ's 4" x 2" Sirius HD Poly on Aluminum Wheels are used in many applications where the casters and wheels are exposed to water or chemicals. Aluminum is resistant to rust and provides a very strong core for the liquid cast polyurethane tread. Polyurethane on Aluminum wheels is used in Food Processing Equipment, Food services, Hospitals, Research Laboratories, Pharmaceutical Laboratories, Bakeries, Schools, Institutional, and industrial applications, and environments. Polyurethane is a non-marking tire that is much easier to roll compared to a softer rubber wheel. Polyurethane on Aluminum wheels is great for wash-down applications and wet, corrosive environments. These are great wheels as long as they are not abused, over-loaded, or used in high-impact shock load applications. Polyurethane on Aluminum Wheels is much lighter in weight but has a high weight capacity. We offer multiple polyurethane tread durometers (hardness) for different applications depending on your floor type and use. We offer flat tread and crown treads with multiple bearing options. If you need an application recommendation please contact us for expert advice.

  • High-Grade Polyurethane Treads
  • Both Softer 85 Shore A & 95 Shore A Durometers
  • 85 Shore A Durometer Tread Deflects Debris
  • Non-Marking and Rolls Effortlessly
  • Unmatched load capacities in its class
  • Ideal for towline applications
  • Multi-Year Tread Durability
  • Effortlessly Rolling using larger 6203 Sealed Precision Ball Bearings

    Questions? Please Call us @ 844-439-4335 or Contact Us Here

    For quick online service please email us: info@casterhq.com and a Caster Expert will help you answer any questions.
    We ship Fast!!!
    If ordered before 12-noon we ship all orders typically ship SAME DAY!
    All orders received after 12-noon will ship the following business day
Key Features
  • Large Double Ball Bearin Raceway and Top Plate
  • Zinc Plated Finish
  • 1/2" Cold Forged Steel Top Plate and Yoke Legs
  • 3/4" Diameter Heat Treaded Kingpin and Nut
  • 1/2" Diameter zerk axle and lock nut
  • Grease Fittings in swivel Raceway
Ordering & Shipping Information

Order processing

In stock. Orders placed before 12pm CT (Mon–Fri) typically ship the same or next business day from our Mansfield, TX warehouse.

Shipping method

Smaller orders ship parcel (UPS/FedEx Ground). Heavy or bulk quantities consolidate to LTL freight. The method and final cost are shown before payment, so there are no post-checkout adjustments.

Payment & procurement terms

Purchase orders — accepted from approved accounts
Net 30 terms — available on approved credit
ACH & all major cards — Visa, MC, Amex, Discover
Tax-exempt — submit your resale/exemption certificate

New to CasterHQ? Open an account or request terms and send your resale or tax-exemption certificate before ordering so it is applied at checkout.

Volume pricing & quotes

Quantity discounts apply automatically — no codes needed. For large, recurring, or custom requirements, request a bulk quote and our team will confirm pricing, lead time, and total landed freight upfront.

Returns & warranty

Stock items carry a 30-day return policy in unused, resalable condition. Made-to-order and custom items are non-returnable once production starts. All products carry the manufacturer's warranty against defects.

Typical transit times after shipment

Central & Southern U.S.: typically 1–2 business days
East & West Coasts: typically 2–3 business days
Remote areas and freight deliveries may take longer.

Need an exact freight quote or blanket PO?

For pallet freight, scheduled releases, or blanket purchase orders, contact our team and we'll confirm total landed cost before you commit. Direct line: 844-439-4335.

Frequently Asked Questions

What is the load capacity of this caster?+

This 4" x 2" Polyurethane on Aluminum Swivel & Rigid Caster – 4,000 lb is rated to 4000 lbs per caster. Size a set by dividing the total load by the number of casters, and for uneven floors assume 3 of 4 casters carry the load. Keep continuous-use loads within about 75-80% of the rating.

What wheel does this caster use?+

This caster runs a Polyurethane wheel with a 2" tread width. Polyurethane protects finished floors, rolls quietly, and resists most chemicals while carrying heavy loads.

What plate size and bolt pattern does it use?+

This caster uses a top-plate mount with a 4" x 4-1/2" plate and a 2-5/8" x 3-3/8" slotted to 3" x 3" bolt pattern. Measure your existing mounting holes before ordering; if you are replacing casters, match the bolt pattern - most standard patterns interchange across brands.

Is this a swivel or rigid caster, and how does the brake work?+

This is a Rigid caster. Rigid casters track straight for directional stability. For most mobile equipment we recommend 2 swivel + 2 rigid, or 4 swivel with at least 2 brakes.

What temperature range can this caster handle?+

Rated for Up to 180°F. Operating outside the rated range can reduce wheel life and load capacity, so match it to your environment (wash-down, freezer, oven-adjacent, etc.).

What floors and applications is it best for?+

The Polyurethane wheel performs best on smooth to semi-smooth floors including sealed concrete, tile, and epoxy. For non-marking or clean-environment needs, ask us about matching tread options.

What is the overall mounted height?+

The overall height (floor to top of plate or stem) is 5-5/8". Account for it when checking equipment clearance, dock height, and ergonomic working height.

How do I order, and what are the terms?+

We accept purchase orders and offer Net 30 on approved accounts, ACH, and all major cards, plus tax-exempt ordering with a resale or exemption certificate. Volume discounts apply automatically; request a bulk quote for large or recurring orders. Stock items carry a 30-day return policy in unused condition (made-to-order items are non-returnable once production starts).

4
4" x 2" Polyurethane on Aluminum Swivel & Rigid Caster – 4,000 lb | CasterHQ

$299.00

Technical Specifications

Dimensions & Mounting
Wheel Diameter 4"
Wheel Tread Width 2"
Overall Height 5-5/8"
Plate Size 4" x 4-1/2"
Bolt Hole Pattern 2-5/8" x 3-3/8" slotted to 3" x 3"
Mount Style Plate
Rig Type Rigid
Load & Performance
Wheel Capacity 4000 lbs
Temp Range Up to 180°F
Brake Type No Brake
Materials & Finish
Wheel Material Polyurethane
Frame Material Zinc Plated Steel
Reference Dimensions
5-5/8" OVERALL HEIGHT 4" x 2" WHEEL DIA x W 4" x 4-1/2" PLATE
Overall Height5-5/8"
Wheel4" x 2"
Top Plate4" x 4-1/2"
Bolt Pattern2-5/8" x 3-3/8" slotted to 3" x 3"
Wheel MaterialPolyurethane
Illustrative caster profile drawn to this item's proportions — dimensions are manufacturer specification values. Confirm against the technical table before ordering.
Will This Caster Handle Your Load?
Enter your loaded weight — we derate to 3 effective casters on a 4-caster rig, per industry practice for uneven floors.
Rated capacity: 4000 lbs per caster. For dynamic loads, towing, or debris-strewn floors, apply additional safety factor · full engineering tools →
Fitment & Interchange
MountPlate
Plate Size4" x 4-1/2"
Bolt Pattern2-5/8" x 3-3/8" slotted to 3" x 3"
Rig TypeRigid
BrakeNo Brake
Slotted holes — fits multiple bolt patterns, ideal for retrofits
Replacing an existing caster? Match the bolt pattern first, then wheel size · more 4" x 4-1/2" plate casters →
Documentation
Spec sheet (PDF) 30-day pricing honored Caster selection guide Caster University Fleet & contract pricing Net 30 available
30-day returns · manufacturer warranty · spec support: 844-439-4335 (Mon–Fri 8–5 CST)
Customers
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