Rubber wheels are far better suited to outdoor-only applications and are used extensively in the construction and air-ground support industries, especially. The pneumatic tires cushion the load and roll over obstructions with ease. These casters provide longer wheel life, less maintenance, and high shock absorbency.
Although rubber casters offer a softer ride, they will not wear as well as polyurethane. As rubber casters are used, they will lose pieces of tread over time, whereas polyurethane casters tend to have much higher levels of resistance to wear and abrasion.