A wheelwright is a craftsman who builds or repairs wooden wheels. The word is the combination of "wheel" and the word "wright", (which comes from the Old English word "wryhta", meaning a worker or shaper of wood) as in shipwright and arkwright. This occupational name became the English surname Wright. It also appears in surnames like Cartwright and Wainwright. It corresponds with skilful metal workers being called Smith. These tradesmen made wheels for carts (cartwheels), wagons (wains), traps and coaches and the belt drives of steam powered machinery. They also made the wheels, and often the frames, for spinning wheels for home use. First constructing the hub (called the nave), the spokes and the rim segments called felloes, (pronounced fell low), and assembling them all into a unit working from the center of the wheel outwards. Most wheels were made from wood, but other materials have been used, such as bone and horn, for decorative or other purposes. Some earlier construction for wheels such as those used in early chariots were bound by rawhide that would be applied wet and would shrink whilst drying, compressing and binding the woodwork together. After many centuries wheels evolved to be straked with iron, a method of nailing iron plates onto the felloes to protect against wear on the ground and to help bind the wheel together. Straking was considered to be a less skilled practice and could be done with less knowledge and equipment, this made the wheels easier to service without the need for a blacksmith. Over millennia the overall appearance of the wheel barely changed but subtle changes to the design such as dishing and staggered spokes helped keep up with the demands of a changing world. These small changes in design made a massive improvement to the strength of the wheel whilst reducing its weight; vehicles then became more efficient to build and use. Industrial age During the industrial age, iron strakes were replaced by a solid iron tyre custom made by a blacksmith after the wheelwright had measured each wheel to ensure proper fit. Iron tyres were always made slightly smaller than the wheel in circumference. They were expanded by heating in a fire, and while hot they were hammered, and pulled by a levered hook, onto the rim of the wheel. The hot tyre was then cooled by placing it into water. This shrank it onto the wood,