Up to 350 lbs
Up to 6,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
High-capacity loads
Shock absorbing
Corrosion resistant
Outdoor / rough terrain
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.



Durastar PO/DPO Series Wheels are designed for demanding material handling applications where durability, floor protection, and low rolling resistance are essential. These 4-inch wheels feature a reliable polyolefin core available in both smooth standard tread (PO) and enhanced donut tread (DPO) configurations—offering tailored solutions based on your specific operational needs.
The 1-1/4" tread width provides exceptional balance and performance, supporting weight with minimal stress on flooring. Whether you're equipping carts, racks, or custom equipment, these wheels offer a seamless rolling experience and long service life—even in challenging environments.
Backed by the trusted Durastar name, these wheels are ideal for facilities that demand strength, consistency, and minimal maintenance. Their polyolefin construction delivers resistance to water, oils, and most chemicals, making them a versatile solution across industrial, commercial, and institutional settings.
Optimize your equipment with 4" Durastar Polyolefin & Donut Tread Wheels—precision-built for durability, safety, and smooth mobility in every rotation.
