Up to 350 lbs
Up to 7,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
Shock absorbing
Outdoor / rough terrain
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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.
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Silent Glide Casters

The Colson Casters 4" x 1.25" Performa Delrin Bearing Caster with Expanding Adapter is designed for those requiring a high-performance solution that adapts to different industrial setups. With a size of 4" x 1.25" and a Delrin Bearing, this caster offers a reliable and smooth rolling experience, ensuring durability and minimal maintenance in a variety of environments.
Engineered for heavy-duty applications, this caster is equipped with a high-quality Performa Rubber tread and a Delrin Bearing that ensures reduced friction, superior mobility, and longer lifespan. Its expanding adapter accommodates 1-3/8" to 1-7/16" inside diameter round tubing, making it versatile for a range of equipment and machinery.
Perfect for industries such as manufacturing, warehousing, and healthcare, the MTG45 Expanding Adapter model guarantees secure and efficient performance. Whether you're upgrading your existing equipment or designing new machinery, Colson Casters' commitment to quality and reliability ensures that this caster will meet your demands.
Improve your operational efficiency with the Colson Casters 4" x 1.25" Performa Delrin Bearing Caster. Built for durability and smooth performance, it's the ideal choice for heavy-duty applications. Experience superior quality and long-lasting reliability in every turn.
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" Performa Delrin Bearing Caster with Expanding Adapter (MTG45) is designed to provide exceptional durability, smooth mobility, and long-lasting performance across a variety of heavy-duty applications. Featuring high-quality Performa Rubber for enhanced durability and a Delrin Bearing that ensures low-friction, effortless rolling, this caster is perfect for industrial, medical, and manufacturing environments where reliability and performance are critical.
Engineered with versatility in mind, the caster features an Expanding Adapter designed to fit tubing with an inside diameter ranging from 1-3/8" to 1-7/16", making it adaptable to a wide range of equipment and machinery. This ability to seamlessly integrate with different setups makes it an ideal choice for environments that demand flexible, high-performance mobility solutions.
The 4" x 1.25" size strikes the perfect balance between mobility and stability, providing a smooth, controlled movement even in tight spaces or on uneven surfaces. Whether it's for manufacturing equipment, hospital carts, or warehouse machinery, the Colson Casters MTG45 delivers superior performance without sacrificing durability or ease of use.
Applications: The Colson Casters 4" x 1.25" Performa Delrin Bearing Caster is a versatile solution that excels in a variety of settings, including:
Why Choose Colson Casters? Colson is a trusted brand known for producing top-quality casters that deliver outstanding performance across multiple industries. With years of expertise, Colson ensures that each caster is built to last, providing you with reliable, long-term mobility solutions. The 4" x 1.25" Performa Delrin Bearing Caster with Expanding Adapter (MTG45) is a testament to Colson’s commitment to innovation and quality.
Product Summary: Upgrade your equipment and mobility solutions with the Colson Casters 4" x 1.25" Performa Delrin Bearing Caster. Whether you're working in industrial, medical, or commercial settings, this heavy-duty caster delivers exceptional performance, reduced friction, and long-lasting durability. Trust Colson Casters for superior functionality, reliability, and seamless integration into your operations.
This Colson MTG45 4" x 1.25" Performa Rubber Caster 1-3/8" Tube Stem is rated to 300 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 Gray Rubber wheel with a 1-1/4" tread width. Rubber absorbs shock and protects floors, and runs quietly, which suits noise-sensitive and light-to-medium duty use.
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 Gray Rubber wheel performs best on rough, uneven, or outdoor surfaces such as asphalt, gravel, and cracked concrete. 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).
$60.00
| 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 | 300 lbs |
| Temp Range | -20°F to 180°F |
| Materials & Finish | |
| Wheel Material | Gray Rubber |
| Wheel Core Material | Polyolefin |
| Frame Material | Zinc Plated Steel |
4" x 1-1/4" Polyurethane Swivel Caster – 300 lb | 3-1/8" x 4-1/8" Plate | CasterHQ
4" x 1-1/4" · 300 lbs
$19
View all 4′ x 1-1/4′ casters & wheels →
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 → | |
| 300 lbs | 4" × 1-1/4"Gray Rubber | — | 5.25" | $60.00 | Viewing | |
| 300 lbsSame capacity | 4" × 1-1/4"Polyurethane | Swivel | 5-1/8" | $19.00 | View → | |
| 300 lbsSame capacity | 4" × 1-1/4"Polyurethane | Swivel | 5-1/8" | $19.00 | View → |



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