8-inch-polyurethane-tire-wheels

1. Available Foam-Filled Tire Sizes

We produce foam-filled tires in many common sizes: 6 inch, 7×1 3/4, 200×50, 2.80/2.50-4, 3.00-4, 4.10/3.50-4, 4.10/3.50-6, 3.00-8, and more. Our tire outer diameters cover 4 inches up to 16 inches. If you need any non-standard sizes, we are able to custom-make wheels according to your drawings or samples.

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2. Raw Material QC for Flat-Free Tires

A. PU Raw Material

Sourcing: All PU chemical raw materials come from top global suppliers, including Dow, BASF and Air Products.

Incoming Check: We randomly test every material batch with cup foaming to check material stability and quality.

B. Rubber Tire Casings

Sourcing: We only use reliable rubber tires from well-known brands Cheng Shin and Innova.

Incoming Check: Each batch gets full visual inspection to spot yellowing, scratches, dents or deformation.

C. Wheel & Hardware Accessories

Standard Compliance: All accessories we source - nylon rims, aluminum rims, steel rims, axles, hubs, screws and other fittings - meet ISO 7176 requirements.

Incoming Testing: We check coating adhesion, dimensions and surface finish first. We also run reliability tests: tensile strength, impact resistance and salt spray testing to guarantee long service life.