When sourcing balloon wheels, the most critical factor is the Low-Pressure Design. These wheels should typically operate at 2 to 4 PSI to allow for maximum surface area contact, preventing equipment from sinking into soft sand or mud. Ensure the material is UV-resistant Polyurethane (PU), as it offers superior durability and puncture resistance compared to standard PVC. Additionally, verify the Load Capacity per wheel; high-quality balloon wheels should support between 35kg to 80kg (77lbs to 176lbs) depending on the diameter, which usually ranges from 9 inches to 16 inches.