A method of printing a contone image in the form an array of contone color pixel values using a printer adapted to print bi-level dots. In general, the elastomeric articles of the invention include an ultra-thin outer layer formed of an acrylic-based polymer and a base polymer layer coagulated onto the surface of the outer layer which forms the primary matrix of the elastomeric article. The vibration, which occurs on the front and rear wheels can be absorbed by compression or expending movement of the suspensions. A second member that is between the bearing surface and the first member when the head and threaded part are rotated in the fastening direction bulges into the locking recesses.