Rebound TestingTesting the rebound properties of various types of wheel materials is also accomplished using the hydraulic press. The specimen is attached to themachine bedplate, pressure is then applied to the wheel for a specified length of time depending on what type and size of wheel is being tested. The wheelis then removed and inspected. The wheel should return to its original shape after a given period of time. Footprint measurements can also be taken tocalculate ground pressure