Product Details & Specifications

The 4.00-8 PU Foam Filled Tire is designed to provide a reliable and maintenance-free solution for mobility equipment. Its foam-filled construction combines the flexibility of a pneumatic tire with the durability of a solid tire, helping reduce the risk of flats while delivering comfortable shock absorption and stable performance. Suitable for mobility scooters and power wheelchairs, this tire is built for everyday use and long-term reliability, making it a practical choice for manufacturers, distributors, and mobility equipment providers.

Specification	Details
Product	PU Foam Filled Solid Tire
Size	4.00-8
Rubber Brand	Cheng Shin
Tread	C161
Material	Rubber + Polyurethane
Bead Width	F84 mm
Color	Black / Grey
MOQ	200–300 pcs
OEM	Available
Sample	Available
Application	Mobility Scooter / Power Wheelchair

Durability Test Conditions For 4.00-8

In our factory,we perform the following tests to ensure that all our products operate at good performance during their long service life:

Rolling Drum Test
Tension/Compression Force Analysis
Side Impact
Drop Testing
Static Load
Circle Track
Coefficient of Friction
Torque
Noise Test
Bump Test

PU Filled Rubber Tires Under the Microscope

SEM Analysis of PU Foam Structure

The mechanical behavior of a PU filled tire is closely related to the cellular structure of its polyurethane filling.

Aleader uses scanning electron microscopy (SEM) to examine the internal structure of PU materials used in its tires.

SEM images reveal an open-cell polyurethane structure with a relatively uniform distribution of cellular pores. In the observed material, most pore diameters are concentrated in the range of approximately 50–100 μm.

This microstructure provides useful information for material development and quality evaluation.

Why Cell Structure Matters

A polyurethane foam is not simply a solid material with air inside. Its mechanical response depends on the polymer network and cellular architecture.

When a tire is subjected to load, the PU filling undergoes compression and deformation. When the load is reduced, the cellular structure recovers toward its original shape.

The resulting tire behavior is influenced by factors including:

Cell size
Cell distribution
Cell-wall structure
Foam density
Polymer formulation
Hardness
Compression behavior
Temperature
Loading frequency

Solid Tire Factory's Certificates

As a professional polyurethane solid tire manufacturer, we are committed to delivering safe, durable and environmentally friendly products that meet the most stringent industry standards. All of our products comply with the requirements of the ISO7176 standard for wheelchairs and mobility aids, and have successfully passed the testing requirements of ROHS and REACH, ensuring our materials are free from hazardous substances and fully aligned with European environmental regulations. Some of our products can even meet the strict German GS certification standards for children's products, reflecting our uncompromising attention to safety and quality. Every batch is subject to strict raw material inspection and finished product testing, and our certificates are independently issued by SGS, one of the world's most recognized testing organizations. With these internationally accredited certifications, our PU solid and filled tires are trusted by clients worldwide across electric wheelchairs, elderly scooters, electric bicycles, baby strollers and special industrial equipment.

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About Aleader Tire - PU Solid Tire Manufacturer

Founded in Xiamen in 2015, Aleader has established a production base in Longyan, China.

Aleader specializes in the R&D and manufacturing of polyurethane products, with applications covering mobility equipment, rehabilitation products, specialty equipment and other industries.

Our product portfolio includes:

PU microcellular solid tires

PU filled rubber tires

High-resilience polyurethane products

Integral-skin foam products

PU sponge materials

PU rigid foam inserts for carbon-fiber wheelchairs

Aleader is supported by a technical team with more than 20 years of experience in polyurethane R&D and product development.

The company's capabilities cover polyurethane material development, product design, manufacturing process control and finished-product testing.

Material and Manufacturing Control

For PU filled tire production, consistent performance depends on controlling the material and manufacturing process from raw materials through finished products.

Relevant process controls may include:

Raw material inspection
Polyurethane formulation control
Mixing ratio control
Foaming process control
Mold and process parameter control
Tire dimensional inspection
Finished-product inspection
Durability and performance testing

This process-based approach allows material characteristics and finished tire performance to be evaluated as part of the same product development system.