What kind of tires should be used for the wheels of outdoor stackers as much as possible?

Pneumatic tires are the correct choice for outdoor stackers because they are designed to provide excellent traction and stability on uneven and varied terrain commonly found outside. The air-filled structure allows them to absorb shocks and bumps, which enhances the comfort of the operator and the performance of the equipment. Additionally, pneumatic tires are better equipped to handle obstacles such as gravel, dirt, or sand, making them ideal for outdoor usage.

In contrast, solid rubber tires are primarily used in indoor environments. They offer durability and puncture resistance but do not perform as well on rough outdoor surfaces. Polyurethane tires, on the other hand, are suited for smooth surfaces and have limited adaptability to outdoor conditions. Foam-filled tires provide better puncture resistance than pneumatic tires but often do not offer the same level of cushion or shock absorption, making them less suitable for varied outdoor terrains. Therefore, pneumatic tires are the optimal choice for outdoor stackers, ensuring safe and efficient operation.