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 4" x 1.25" HI-TECH Delrin Bearing Caster with Square Tubing Expanding Adapter (2.04267.91 MTG55) is crafted to offer an exceptional combination of strength, reliability, and smooth operation. Designed for demanding industrial applications, the HI-TECH Delrin material is engineered for enhanced durability, making it resistant to corrosion and wear. The precision bearings ensure effortless movement, even under heavy loads, providing silent and smooth operation. The included expanding adapter allows for easy mounting on square tubing with an inside diameter range of 1-3/8" to 1-7/16", making installation hassle-free and versatile. Ideal for machinery and industrial uses, this caster offers long-lasting performance in a variety of settings.
Built with high-quality materials and advanced manufacturing processes, the 4" x 1.25" HI-TECH Delrin Bearing Caster (2.04267.91 MTG55) is engineered to meet industrial-grade standards. This caster is subjected to rigorous testing to ensure it delivers optimal performance in heavy-duty applications. Backed by our customer satisfaction guarantee, you can be confident in the caster's reliability, durability, and exceptional value. We are dedicated to providing products that stand up to the toughest challenges, ensuring long-term performance for your business or project needs.
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 4" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Square Tubing Adapter (MTG55) is designed for heavy-duty industrial applications. Featuring a high-performance, durable HI-TECH Polyurethane wheel, this caster is perfect for use in demanding environments where reliability and long-term performance are crucial. The caster is equipped with Delrin bearings, ensuring smooth and quiet movement even under heavy loads.
Engineered with full double ball hardened raceways, the 4" x 1.25" caster offers enhanced performance and longevity. The multi-temp grease used in the raceways ensures optimal performance in both extreme hot and cold temperatures, making it an ideal choice for industries requiring reliability in variable environmental conditions. The zinc finish provides additional protection against corrosion, ensuring the caster's longevity in harsh conditions.
With its expanding square tubing adapter, the caster can easily fit 1-3/8" to 1-7/16" inside diameter square tubing, making it a versatile solution for a wide range of industrial equipment. The caster’s simple mounting system ensures that installation is quick and efficient, providing flexibility and convenience for various machinery applications.
With a load capacity of 275 lbs, the caster is built to handle heavy-duty tasks with ease. The round tread profile of the wheel enhances its grip, providing stability and minimizing wear during use. This caster is perfect for applications in industries such as manufacturing, warehousing, and logistics, where heavy equipment and machinery require robust and reliable components for smooth operations.
The caster performs effectively in temperatures ranging from -45°F to +180°F, ensuring consistent movement and durability across a wide spectrum of industrial environments. Whether exposed to extreme heat or cold, this caster maintains smooth operation, contributing to its versatility across various industries.
The 4" x 1.25" HI-TECH Delrin Bearing Caster comes with a 3-year warranty, underscoring its durability and the manufacturer’s commitment to quality. The product is RoHS compliant, meeting environmental standards and ensuring safety in industrial settings. Additionally, it is NSF component certified (less thread guards), making it suitable for use in environments that require strict hygiene and safety standards.
Whether you are upgrading your machinery or outfitting your equipment with new components, the 4" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Square Tubing Adapter is a top-tier choice for businesses that require a reliable, high-performance caster. Designed to provide superior durability, versatility, and ease of use, this caster offers exceptional value and peace of mind for all your industrial needs.
This 4" x 1.25" Delrin Square Tubing Expanding Caster 1-3/8" to 1-7/16" 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.
This is a Swivel caster. Swivel casters rotate 360 degrees for full maneuverability. 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.
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 |
| Rig Type | Swivel |
| Load & Performance | |
| Wheel Capacity | 275 lbs |
| Temp Range | -20°F to 180°F |
| Brake Type | No Brake |
| 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 | Swivel | 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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