The Wesco Solid Rubber Wheel is a wide treaded tire known for its toughness and durability. It is made entirely of thick flexible solid rubber which is less expensive than most wheels. Its maximum load capacity at the largest 10 inch size is 550 poun ds.Solid Rubber wheels are a hybrid between semi-pneumatic and moldon rubber. They offer more cushioning than moldon rubber. Solid rubber wheels are easier to move under heavy loads than are semi-pneumatic wheels