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
Chopper (motorcycle) racing arena, which placed a premium on pure engine power, rather than handling over curvy courses. Chopper styling continued to be influenced by drag-bike modifications throughout the 1960s and 1970s. While all choppers are highly customized bikes, sometimes even being built from scratch using all custom parts, not all customized bikes are choppers. In Europe at roughly the same era that choppers were invented and popularized in the USA, bikers modified their bikes (primarily English brands like Triumph, BSA, Norton, and Matchless) in a different way, to achieve different looks, performance goals and riding position. The resulting bikes are known