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" Side Lock Caster is engineered to provide reliable, secure mobility across a wide range of applications. Featuring a high-performance Poly HI-TECH BB Wheel, this caster ensures smooth, quiet operation even under heavy loads, making it a top choice for industrial and commercial use.
With its 1/2" thread, this caster is designed to fit most standard equipment, offering a hassle-free installation process. The precision ball bearing further enhances the performance, providing reduced friction and smoother rolling. The side lock mechanism adds a layer of safety, allowing you to stabilize equipment when stationary, preventing unwanted movement.
Whether you’re outfitting manufacturing machinery, hospital carts, or material handling systems, this Colson caster offers the durability, strength, and functionality required to improve your workflow. Trust in Colson Casters for reliable performance in demanding environments.
Upgrade your equipment with Colson Casters' innovative 4" x 1.25" Side Lock Caster. Experience smoother, more secure mobility and long-lasting durability for all your 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 4" x 1.25" Side Lock Caster is designed for demanding industrial and commercial applications, providing both smooth rolling and reliable stability. Featuring a Poly HI-TECH BB Wheel with precision ball bearings, this caster delivers quiet operation and reduced friction for superior mobility. Whether you're outfitting hospital carts, factory machinery, or material handling systems, this caster is engineered to meet the toughest requirements.
The 1/2" thread size ensures compatibility with most equipment, offering a simple and secure installation. In addition, the side lock mechanism provides extra security by preventing unwanted movement when the caster is stationary. This caster is perfect for environments that require both mobility and stability, ensuring efficiency and safety in every move.
The Colson Casters 4" x 1.25" Side Lock Caster is designed to provide superior performance and security in any environment. Whether used in healthcare settings, warehouses, or manufacturing facilities, the caster's smooth performance ensures easy maneuverability, reducing strain on users while enhancing productivity. The heavy-duty load capacity ensures that the caster can handle even the most demanding tasks, providing reliable support for all your equipment.
Thanks to its precision ball bearings, the caster reduces friction, allowing for effortless rolling across various surfaces, whether smooth or rough. This caster also minimizes noise, making it ideal for noise-sensitive environments such as hospitals and medical facilities. The side lock feature ensures your equipment stays securely in place, making this caster a safe choice for environments that require maximum stability.
The Colson Casters 4" x 1.25" Side Lock Caster is versatile and can be used across multiple industries. Ideal for healthcare settings, it can be used on hospital carts, medical equipment, and patient transport devices. In industrial and commercial environments, this caster is perfect for material handling systems, machinery, and factory equipment. Its heavy-duty design and smooth mobility make it suitable for various uses, ensuring reliable performance wherever you need it.
Enhance your equipment's mobility with the Colson Casters 4" x 1.25" Side Lock Caster. With its high-quality design, durability, and easy installation, this caster is the perfect solution for industries that require reliability and smooth operation. Don't compromise on performance—choose Colson Casters for all your mobility needs.
This Colson 2.04254.95 MTG53 BRK1 4" x 1.25" Poly Side Lock Caster 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 with a 1-1/2" x 13" plate. 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". 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).
$51.00
| Identification | |
| Brand | colson header1 |
| Dimensions & Mounting | |
| Wheel Diameter | 4" |
| Wheel Tread Width | 1-1/4" |
| Overall Height | 5" |
| Plate Size | 1-1/2" x 13" |
| 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" | $51.00 | 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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