Motorcycle a three-speed gearbox and belt transmission. It was so popular with its users that it was nicknamed the "Trusty Triumph." By 1920, Harley-Davidson was the largest manufacturer, with their motorcycles being sold by dealers in 67 countries. In the 1950s, streamlining began to play an increasing part in the development of racing motorcycles and the "dustbin fairing" held out the possibility of radical changes to motorcycle design. NSU and Moto Guzzi were in the vanguard of this development, both producing very radical designs well ahead of their time. NSU produced the most advanced design, but after the deaths of four
Motorcycle wheel rear wheel which was shown at the Intermot motorcycle show at Cologne in late 1966. Elliott Morris began producing seven-spoke cast magnesium racing wheels in 1973. In November 1974 the Van Veen was exhibited at the Cologne motorcycle show with front and rear cast wheels and triple Brembo disc brakes for their 1975 Model Year rotary-engined OCR1000 machines. Aftermarket cast wheels for Japanese makes having drum rear and front disc brakes were available in UK from late 1974. A patent for a cast alloy motorcycle wheel was filed in 1974 and assigned to Carroll Shelby's Shelby-Dowd Industries; and in early