Wheels with rubber treads are suitable for most types of flooring and provide more floor protection than wheels with metal treads. They are available in a range of hardnesses. In general, soft rubber treads offer more cushioning and better floor protection than hard rubber treads, and hard rubber treads provide more weight capacity, better abrasion resistance, and easier rolling than soft rubber treads. Rubber tread standard wheels are used for replacing the existing wheels on carts, racks, and similar equipment.