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" Polyolefin Delrin Bearing Caster with Expanding Adapter is a reliable and high-performance solution for your mobility needs. This caster features a durable polyolefin wheel combined with a Delrin bearing, offering smooth, low-resistance movement while ensuring longevity. The expanding adapter fits square tubing with an inside diameter range of 1-1/8" to 1-3/16", providing versatile compatibility with various equipment setups.
Designed with functionality and ease of use in mind, this caster is built to withstand demanding environments such as industrial facilities, warehouses, and factories. Its expanding adapter allows for easy installation, making it a practical and efficient option for upgrading your mobility systems. With a 4" x 1.25" size, this caster provides the ideal balance between strength, stability, and maneuverability.
Colson Casters is committed to delivering high-quality products that prioritize performance and durability. Whether you're looking to replace an old caster or optimize your mobility system for improved efficiency, the 4" x 1.25" Polyolefin Delrin Bearing Caster with Expanding Adapter (MTG53) is designed to meet your needs. Trust in Colson Casters for long-lasting, reliable solutions that help improve your operations and mobility.
Upgrade your mobility solutions with Colson Casters' 4" x 1.25" Polyolefin Delrin Bearing Caster. Designed for reliability, ease of use, and superior performance, it's the perfect choice for industrial and heavy-duty applications.
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" Polyolefin Delrin Bearing Caster with Expanding Adapter offers a highly durable and versatile mobility solution for demanding industrial, medical, and warehouse applications. This caster combines the robustness of a polyolefin wheel with the precision of a Delrin bearing, ensuring smooth operation under heavy loads while minimizing friction. The expanding adapter is designed for square tubing installations, accommodating tubing with an inside diameter ranging from 1-1/8" to 1-3/16".
Colson Casters' 4" x 1.25" Polyolefin Delrin Bearing Caster is perfect for industrial, medical, and commercial use. Whether you need mobility solutions for warehouses, factories, hospitals, or general heavy-duty applications, this caster offers the ideal combination of strength and maneuverability. It can be used for a variety of carts, equipment, and machinery, where easy movement and heavy-duty performance are critical.
Colson Casters are engineered to meet the toughest standards, ensuring your caster system provides long-lasting service. The polyolefin wheels and Delrin bearings are resistant to wear and tear, making them an ideal choice for demanding environments. Whether used in high-traffic areas or under heavy loads, these casters will continue to deliver reliable performance for years.
Colson Casters is a trusted brand with a reputation for producing top-quality mobility products. With decades of experience in manufacturing innovative caster solutions, Colson Casters is committed to providing products that enhance the efficiency and safety of operations. Their expertise in industrial and commercial mobility solutions ensures that each product is built to the highest standards of performance and reliability.
Upgrade your operations with the Colson Casters 4" x 1.25" Polyolefin Delrin Bearing Caster. Designed for heavy-duty use and easy installation, it's the perfect mobility solution for a wide range of applications. Trust Colson Casters to deliver the quality, reliability, and performance you need to enhance your workflow.
This Colson 2.04267.53 MTG53 4" x 1.25" Polyolefin Caster – 1-1/8" 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 Polyolefin 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 Polyolefin 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).
$55.00
| 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 | Polyolefin |
| 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"Polyolefin | — | 5.25" | $55.00 | 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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