When sourcing balloon tires, prioritize low-pressure performance (typically 2-4 PSI) to ensure the tire can deform and float over soft surfaces like sand or mud. Check the Payload Capacity; standard beach wheels usually support 35kg to 55kg per tire, while heavy-duty versions can exceed 100kg. Material composition is critical—look for UV-resistant Polyurethane (PU) or PVC, as these materials prevent cracking under sun exposure and salt spray. Additionally, verify the axle hole diameter (common sizes are 20mm, 22mm, or 25.4mm) to ensure compatibility with your existing cart or trailer frames.