Abstract: An apparatus for testing shoe durability by simulating the leg movements of a runner using a flexible artificial foot to repetitively drive the sole of a test shoe against an abrasive wear surface. The artificial foot is controlled by cam-operated plungers which reciprocate in synchronization causing the artificial foot to repetitively move through a leg cycle in which the heel is first driven against the wear surface followed by the ball and then the toe with empirically predetermined forces such that a normal wear pattern is produced. The wear surface is supported on a carriage which is longitudinally movable relative to the artificial foot in response to the forces of contact of the test shoe against the wear surface, the carriage including an adjustable spring for selecting a desired resistance to carriage movement. A mechanism is provided for tilting the wear surface to simulate running on an uneven surface.