I suppose it is easy for people to forget but wood is what the world's first bike was made from - and they were made from it for years after. They came with either wooden wheels, or wood wheels lined with strips of metal for "tyres" - cyclists had to wait some time for the pneumatic (air-filled) tyre to come along - and as a result early bikes were not exactly 'comfortable' (hence the bike called the Bone-Shaker). They also used to be pushed, not peddled as pedals, chains and gears were yet to be

You have forgotten the best wooden bike ever made- the Splinterbike! World Land Speed Record Holder and still made of 100% wood.