Featuring our best-in-class polyurethane on aluminum wheels, these casters will outlast the competition in durability and ergonomic performance. Explore the testing results versus a leading competitor in this ergonomic comparative wheel analysis PDF. The MAX-Efficiency wheel features an advanced polyurethane blend that has been tested to outperform a leading competitor by 26% in reduced push/pull force while lasting up to 2x longer in durability testing – those are real benefits that will help your employees work safer, improve material flow, and stretch your purchasing power.