Wheelie bike of motorcycles customized in the Bobber or Chopper style. Inspired, he designed a mass-production bike for the youth market as "Project J-38", and the result was introduced to the public as the Schwinn "Sting-Ray" in 1963. Sales were initially slow, but eventually took off. By 1965, several other American and foreign manufacturers were offering their own version of the Sting-Ray. BMX bikes began to supersede wheelie bikes in the 1970s, though Schwinn continued to offer them until 1982 and Raleigh until 1984. Original wheelie bikes are popular collectors' items now, and some manufacturers have reintroduced updated versions. The seating position
Electric bicycle complicated but numerous 'replace a wheel' solutions are now available on the market. An Electric Pusher Trailer is an e-bike design which incorporates a motor and battery into a trailer that pushes any bicycle. One such trailer is the two-wheeled Ridekick. Other, rarer designs include that of a 'chopper' styled e-bike, which are designed as more of a 'fun' or 'novelty' e-bike than as a purposeful mobility aid or mode of transport. Electric cargo bikes allow the rider to carry large, heavy items which would be difficult to transport without electric power supplementing the human power input. Various designs (including