Picture of hickory bikes, circa 1897 & 1898, at the Bicycle Museum of America in New Bremen, Ohio.
http://tinyurl.com/53hl2y
There was also an Italian-made wooden bike from around the 1939-45 World War shown on the UK's Antiques Road Show years ago, probably built because of the shortage of available metal?
http://tinyurl.com/3tvu6e
Alan LloydSchaumburg, Illinois, U.S.A.