Up to 350 lbs · Light Duty Applications
Up to 7,200 lbs · Industrial Duty
Up to 17,500 lbs · Heavy Industrial
Up to 40,000 lbs · Extreme Load Applications
Up to 40,000 lbs · Increased Maneuverability
Up to 3,100 lbs · Industrial Shock Absorbing
Up to 3,200 lbs · Corrosion Resistant
Up to 8,400 lbs · Outdoor & Rough Terrain
1,000+ Styles · OEM Replacements
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.
Engineered for OEM, MRO, and defense. Spec-match guarantee, engineering RFQ on every quote, fastest shipping in the caster industry.
















The Durastar Casters S30 Series brings innovation and durability to your mobility solutions. Built with precision engineering, these top plate casters are designed to handle medium to heavy-duty loads with ease. Made from high-strength steel, the S30 Series offers superior strength and long-lasting performance, making them ideal for a wide range of industrial and commercial applications.
Available in top plate sizes like 4" x 4-1/2", and with customizable options, the S30 Series provides flexibility to meet your specific needs. Whether you need casters for factory equipment, warehouse carts, or machinery, the S30 Series ensures smooth and easy mobility, even under challenging conditions.
The S30 Series also offers a variety of wheel options to suit different floor types, from hard concrete to delicate flooring. Each caster is designed to minimize wear and tear, ensuring that your investment in Durastar Casters provides consistent, reliable results over time.
Choose Durastar Casters for your medium-heavy duty mobility needs, and trust in our commitment to providing high-quality, durable products backed by industry-leading testing and quality assurance.
Upgrade your equipment with the S30 Series of top plate casters. Designed for reliability and superior load-handling, the S30 Series offers a perfect blend of performance, durability, and flexibility to meet your toughest requirements.
These calculators apply to any caster application—even if you’re browsing a different category. Use them to estimate load rating per caster, select wheel material, and estimate push/pull force. Expand any tool for full analysis + a share-ready spec line.
Engineering Tools Hub
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Load Calculator (dedicated)
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Wheel Diameter Calculator
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Failure Diagnosis Tool
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Designed for engineers, manufacturers, and material handling professionals
