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.
Specialty Casters
Gate Casters
BBQ Pit & Smoker Casters
Keyed Drive Wheels
Drywall Cart Casters
Skid Wheels & Casters for RVs
Leveling Casters
Shopping Cart Wheels & Casters
Band Equipment Casters & Wheels
Low Profile Casters
Cart Wheels & Casters
Toolbox Caster Sets
Bakery & High Temperature Casters
Kitchen Prep Table Caster Sets
Wire Shelving Casters
Silent Glide Casters

Experience the resilience of a 4" x 2" Ergo-Glide Polyurethane (85A) on Cast Iron Wheel. Perfectly crafted to ensure optimal performance and longevity.
Equipped with 1/2" Sealed Precision Ball Bearings, this caster guarantees smoother movements and reduced friction, making it ideal for heavy-duty applications.
Get the best in class Hamilton R-SPHS-4SPB-1 caster for your industry needs. Secure, robust, and designed to last.
Note: Explore more details and similar products below.
Constructed with superior materials ensuring durability and longevity.
Features a 4"x2" Ergo-Glide Polyurethane on Cast Iron for smooth mobility.
Ensures smoother movement with reduced friction.
Allows for enhanced durability.
Designed to handle heavy loads with ease.
Materials that resist wear from environmental factors.
Wheel design that won't leave marks on your floor.
Designed for hassle-free setup and integration into equipment.
Constructed with environmentally responsible materials.
Hamilton's long-standing reputation for top-tier caster products.
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
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.
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.
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.
The Hamilton R-SPHS-4SPB-1 Rigid Caster is not just another caster. Its specifications and design reflect the commitment to quality and performance synonymous with Hamilton. Below, we dive deeper into what makes this product exceptional.
At the heart of this caster is its 4"x2" Ergo-Glide Polyurethane wheel mounted on a sturdy Cast Iron core. This combination assures smooth operation while offering unparalleled durability against wear and tear, even in challenging environments.
Precision matters when it comes to mobility. The 1/2" Sealed Precision Ball Bearings facilitate effortless movement and turnings. The sealed design ensures minimal maintenance while prolonging the life of the caster.
Trusting Hamilton means investing in a brand that has cemented its legacy in the caster industry. With consistent product quality, innovation, and customer satisfaction, choosing the R-SPHS-4SPB-1 is an investment in reliability.
Elevate your operations with the Hamilton R-SPHS-4SPB-1 Rigid Caster. Guaranteeing smooth movements, durable construction, and an impeccable design - this caster is crafted for those who seek the best.
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.
This caster uses a top-plate mount. Measure your existing mounting holes before ordering; if you are replacing casters, match the bolt pattern - most standard patterns interchange across brands.
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.
Rated for -20°F 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.).
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.
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).
$473.00
| Identification | |
| Brand | Hamilton |
| Dimensions & Mounting | |
| Wheel Diameter | 4" |
| Wheel Tread Width | 2" |
| Mount Style | Plate |
| Rig Type | Rigid |
| Load & Performance | |
| Temp Range | -20°F to 180°F |
| Brake Type | No Brake |
| Materials & Finish | |
| Wheel Material | Polyurethane |
| Wheel Core Material | Iron |
| Frame Material | Zinc Plated Steel |
4" ATX Solid Thermo Rubber Rigid Flat Free Caster | CasterHQ
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4" x 2" Thermo Rubber Rigid Caster – 300 lb | 4" x 4-1/2" Top Plate | CasterHQ
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View all 4′ x 2′ casters & wheels →
Your selection is highlighted. Every option shares its wheel size and mount; a Direct fit tag means the same mounting plate — a drop-in replacement. Step up or down in load rating, all in-stock.
| Casters (in stock) | Load capacity | Wheel | Type | Overall height | Price | |
|---|---|---|---|---|---|---|
| — | 4" × 2"Polyurethane | Rigid | — | $473.00 | Viewing | |
| 200 lbsHeavier duty | 4" × 2"Gray Rubber | Rigid | 5-5/8" | $39.00 | View → | |
| 250 lbsHeavier duty | 4" × 2"Gray Rubber | Swivel | 5-5/8" | $40.00 | View → | |
| 300 lbsHeavier duty | 4" × 2"Gray Rubber | Rigid | 5-5/8" | $26.00 | View → | |
| 350 lbsHeavier duty | 4" × 2"Gray Rubber | — | — | $14.00 | View → |





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