Wheelie bike speedometers, windshields, hand grip streamers, headlights, taller sissy bars, axle spinners, and back rests such as shown on this bicycle: The Raleigh Chopper was the best selling children's bicycle in the UK. The wheelie bike fad drove bicycle sales to over 4 million units in the US, and accounted for 75% of total US bicycle sales in 1968, but it also helped contribute to the impression in the US that bicycles are merely children's toys. Dangerous features, such as shifters mounted on the top tube, were banned in the US in 1974. The wheelie bike fad even attracted the attention
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