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.

The Colson Casters 4" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Adapter (MTG45) provides a combination of durability, flexibility, and reliable performance. Engineered with a Delrin bearing, this caster ensures smooth, consistent motion even under heavy loads, making it an ideal choice for a wide range of industrial, medical, and other heavy-duty applications.
Equipped with a versatile expanding adapter, the caster is designed to fit round tubing with an inside diameter of 1-3/8" to 1-7/16", allowing for easy installation and a secure fit. This feature makes it a highly adaptable solution for a variety of settings, from warehouses to healthcare facilities.
With a durable 4" x 1.25" caster size, this model is perfect for environments that demand robust, high-performing solutions. The caster's high-quality construction ensures long-lasting use, even in the most demanding applications, providing peace of mind and reliability for years to come.
Whether you’re looking to enhance the mobility of equipment in industrial settings or seeking a smooth, low-maintenance solution for medical devices, the Colson Casters 4" x 1.25" Delrin Bearing Caster with Expanding Adapter offers a dependable, high-quality option for your needs.
Upgrade your equipment with the Colson Casters HI-TECH Delrin Bearing Caster. Enjoy superior performance, durability, and versatility with every roll.
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 Colson Casters 4" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Adapter (MTG45) offers a unique combination of reliability, smooth operation, and versatility. Designed to meet the demands of both industrial and medical applications, this caster ensures that your equipment moves efficiently while maintaining a high standard of durability. With a Delrin bearing, it provides a low-friction performance ideal for heavy-duty operations.
The expanding adapter is designed for 1-3/8" to 1-7/16" inside diameter round tubing, allowing for easy integration with various types of equipment and machinery. Whether used in hospitals, factories, or warehouses, this caster’s ability to adapt to different tubing sizes offers unmatched flexibility for users looking for an easy-to-install solution.
Key Benefits:
- Durability: Built with high-quality materials, ensuring long-lasting use in demanding environments.
- Smooth Operation: The Delrin bearing reduces friction, providing a quiet and smooth rolling experience, even under heavy loads.
- Load Handling: The 4" x 1.25" caster is engineered for high load-bearing capacity, making it suitable for industrial equipment, medical carts, and more.
- Easy Installation: The expanding adapter ensures a secure fit for various tubing sizes, simplifying setup and reducing downtime.
- Low Maintenance: Designed for minimal upkeep, the caster offers durability with little ongoing maintenance required, helping reduce long-term costs.
Applications:
The Colson Casters HI-TECH Delrin Bearing Caster is an excellent choice for a wide range of applications, including:
When you choose Colson Casters, you're investing in a product that's built to last. Our commitment to quality and performance means that you can trust this caster to provide seamless mobility across a range of challenging environments. Whether you're moving medical equipment or industrial machinery, the HI-TECH Delrin Bearing Caster guarantees smooth, reliable service that you can count on day in and day out.
Colson Casters is a trusted name in mobility solutions, known for its commitment to high-quality manufacturing, durability, and precision engineering. Our casters are designed with the user in mind, offering versatility and functionality that meet the needs of a wide variety of industries. By choosing Colson Casters, you're ensuring that your equipment moves smoothly and efficiently, without compromising on reliability.
Upgrade your equipment's mobility with Colson Casters. Our 4" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Adapter (MTG45) offers superior performance and reliability. Enhance your equipment's functionality and ensure its durability with this high-quality caster. Order now and experience the difference that Colson Casters can make.
This Colson MTG45 4" x 1.25" Delrin Caster – 1-3/8" to 1-7/16" Stem is rated to 275 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.
This caster runs a Polyurethane wheel with a 1-1/4" 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.
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.
The overall height (floor to top of plate or stem) is 5.25". Account for it when checking equipment clearance, dock height, and ergonomic working height.
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).
$63.00
| Identification | |
| Brand | colson header |
| Dimensions & Mounting | |
| Wheel Diameter | 4" |
| Wheel Tread Width | 1-1/4" |
| Overall Height | 5.25" |
| Mount Style | Plate |
| Load & Performance | |
| Wheel Capacity | 275 lbs |
| Temp Range | -20°F to 180°F |
| Materials & Finish | |
| Wheel Material | Polyurethane |
| Frame Material | Zinc Plated Steel |
4" x 1.25" Polyurethane Swivel Caster – 325 lb | 2.5" x 3.625" Top Plate | CasterHQ
4" x 1-1/4" · 260 lbs
$14
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 | |
|---|---|---|---|---|---|---|
| 250 lbsLighter duty | 4" × 1-1/4"Gray Rubber | Swivel with Total Lock Brake + brake | — | $24.00 | View → | |
| 260 lbsLighter duty | 4" × 1-1/4"Polyurethane | Swivel | 4-1/8" | $14.00 | View → | |
| 275 lbs | 4" × 1-1/4"Polyurethane | — | 5.25" | $63.00 | Viewing | |
| 300 lbsHeavier duty | 4" × 1-1/4"Polyurethane | Swivel | 5-1/8" | $19.00 | View → | |
| 300 lbsHeavier duty | 4" × 1-1/4"Polyurethane | Swivel | 5-1/8" | $19.00 | View → |



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