The wheels and basket of the chariot were usually of wood, strengthened in places with bronze or iron. The wheels had from four to eight spokes and tires of bronze or iron. Due to the widely spaced spokes, the rim of the chariot wheel was held in tension over comparatively large spans. Whilst this provided a small measure of shock absorption, it also necessitated the removal of the wheels when the chariot was not in use, to prevent warping from continued weight bearing. Most other nations of this time had chariots of similar design to the Greeks, the chief differences being the mountings.