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 | 3.5" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Adapter (MTG43) is designed to provide superior durability and smooth performance in a wide range of applications. This caster features a high-performance HI-TECH Delrin bearing that ensures smooth operation even in high-load environments, making it ideal for industries such as manufacturing, healthcare, and logistics.
With an expanding adapter that accommodates 1-1/8" to 1-3/16" inside diameter round tubing, this caster offers flexible mounting options to suit various equipment needs. The robust construction is perfect for environments where reliability and longevity are essential. Whether you need a caster for medical carts, industrial machinery, or storage systems, this product meets the highest standards of quality and performance.
Colson Casters' commitment to excellence is evident in every product we offer. Our focus on delivering high-quality, engineered solutions ensures that you get not only superior functionality but also long-lasting performance. Trust in Colson Casters to enhance your mobility solutions with products that provide both reliability and ease of use.
Upgrade your equipment with Colson Casters' expanding adapter solution, providing the reliability and flexibility you need for smooth, efficient movement. Experience superior performance and durability tailored to your specific operational 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 Colson Casters 3.5" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Adapter (MTG43) offers a reliable, durable, and versatile solution for industrial and medical applications. Engineered with the highest standards of quality, this caster combines superior materials with exceptional performance features. It includes a robust HI-TECH Delrin bearing for smooth and efficient operation under heavy loads, ensuring it performs reliably in demanding environments.
The caster also features an expanding adapter that accommodates 1-1/8" to 1-3/16" inside diameter round tubing, providing flexible and secure mounting options for a variety of equipment and machinery. Whether you are equipping medical carts, industrial machinery, or storage systems, this caster delivers the performance and adaptability you need for seamless mobility in your operations.
Colson Casters has long been a trusted name in the mobility solutions industry, providing high-quality casters designed to meet the rigorous demands of both industrial and medical sectors. With a focus on performance, reliability, and customer satisfaction, Colson Casters delivers products that stand up to the test of time.
Choosing Colson Casters means opting for top-tier engineering, precise manufacturing, and the kind of quality that only comes from years of industry experience. This 3.5" x 1.25" HI-TECH Delrin Bearing Caster is just one example of the company's dedication to providing effective, long-lasting mobility solutions.
The Colson Casters 3.5" x 1.25" HI-TECH Delrin Bearing Caster with Expanding Adapter is built to perform across a range of applications. Whether you're looking for casters for hospital equipment, manufacturing machinery, or storage solutions, this caster is designed to deliver exceptional reliability and performance. With Colson Casters, you can trust that you're getting a product that can handle the demands of your business, ensuring smooth, efficient operations every day.
This Colson 2.03267.91 MTG43 3.5" x 1.25" Delrin Caster 1-1/8" Expanding Stem is rated to 250 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 4.56". 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).
$61.00
| Identification | |
| Brand | colson header |
| Dimensions & Mounting | |
| Wheel Diameter | 3-1/2" |
| Wheel Tread Width | 1-1/4" |
| Overall Height | 4.56" |
| Mount Style | Plate |
| Load & Performance | |
| Wheel Capacity | 250 lbs |
| Temp Range | -20°F to 180°F |
| Materials & Finish | |
| Wheel Material | Polyurethane |
| Frame Material | Zinc Plated Steel |
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