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 (MTG42) is a versatile and durable solution for your mobility needs. Engineered with a high-quality polyolefin wheel, this caster ensures smooth and stable movement across a variety of surfaces. The Delrin bearing system reduces friction, providing a quieter and more efficient performance.
The expanding adapter is designed to fit round tubing with an inside diameter ranging from 1" to 1-1/16". This feature makes it a highly adaptable solution for different mounting needs in industrial settings. With its robust construction and excellent load-bearing capacity, this caster is perfect for environments that require both mobility and durability.
Whether you're outfitting equipment for factories, warehouses, or material handling systems, the Colson Casters MTG42 caster will enhance your operations. The caster's polyolefin wheel is built for longevity and can handle tough conditions, making it an ideal choice for a wide range of applications.
Experience superior performance and reliability with the Colson Casters 4" x 1.25" Polyolefin Delrin Bearing Caster. Perfect for industrial and commercial applications, it provides long-lasting value and smooth maneuverability for your equipment. Upgrade today and enjoy the benefits of enhanced mobility.
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 (MTG42) is the ideal solution for applications requiring high durability and smooth, reliable movement. This caster features a polyolefin wheel, known for its excellent wear resistance and ability to handle a wide range of surfaces, ensuring smooth operation even in heavy-duty environments. The Delrin bearing minimizes friction and noise, contributing to a quieter and more efficient rolling performance.
What sets this caster apart is its expanding adapter, which accommodates tubing with an inside diameter ranging from 1" to 1-1/16". This feature offers versatility and easy installation, as it can be adapted to various round tubing sizes without the need for special tools or adjustments. The 4" x 1.25" wheel size ensures stable and dependable mobility, making it suitable for both industrial and commercial applications.
Designed for heavy-duty use, the MTG42 caster is engineered to withstand demanding conditions such as those found in factories, warehouses, and other high-traffic industrial settings. Its low-maintenance design means less downtime and reduced maintenance costs over time. Whether you're outfitting material handling equipment, machinery, or office furniture, this caster offers the reliability and durability needed for everyday use in tough environments.
The Colson Casters MTG42 is perfect for a wide range of applications, including material handling equipment, industrial machinery, office furniture, and more. It provides excellent mobility for moving heavy loads, making it ideal for use in warehouses, factories, hospitals, and other high-demand environments. Its ergonomic design also minimizes strain on users, contributing to improved overall productivity and efficiency in workplaces.
Colson Casters is renowned for its commitment to quality, durability, and innovation. With decades of experience in manufacturing high-performance casters, Colson products are trusted by industries worldwide. The MTG42 caster exemplifies the brand’s dedication to providing solutions that enhance mobility, improve safety, and increase operational efficiency. Choose Colson Casters for reliable, long-lasting products that deliver exceptional performance in every application.
Upgrade your mobility solutions today with the Colson Casters 4" x 1.25" Polyolefin Delrin Bearing Caster with Expanding Adapter. Engineered for durability and versatility, this caster is the perfect choice for demanding environments. With its smooth operation, reliable performance, and easy installation, it’s the ideal addition to your equipment. Get started now and elevate your operational efficiency with Colson Casters!
This Colson MTG42 4" x 1.25" Polyolefin Caster – 1" to 1-1/16" Expanding 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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