Wheelie bike of non-bicycle manufacturers that developed and sold add-on products, such as the Wham-O wheelie bar. Though initially a US fad, wheelie bikes also became popular in the UK, Canada, New Zealand, and South Africa. Australia had its own Malvern Star Dragster, ,Brazil had its own Monark Tigrão., and in Norway, Øglænd made the DBS Tomahawk. The former The Shaggs singer Dot Wiggin recorded the song "Banana Bike" in 2013 as a tribute to her sister Helen, who died in 2006. Helen owned a yellow imported Raleigh Chopper that she used to keep fit with, that Dot found amusing that a
Gazelle (bicycle company) collectors item. During this period, Gazelle was to use the Piet Pelle cartoon character throughout many advertising campaigns. This video from 1925 shows the Gazelle factory and production techniques. Developments include a collapsible delivery bicycle in 1930 and a tandem bicycle introduced in 1935. An electric bicycle was produced in 1937 together with Philips. In 1954 Gazelle became a public company and built its millionth bicycle. In 1959, Gazelle patented the first 3-Speed grip shift gear system. Gazelle was the first Dutch bicycle manufacturer to introduce the "Kwikstep" folding bicycle in 1964. The front-hub drum brake was developed in 1968