After the close of the First World War, the British motorcycle industry rose to prominence as British motorcycles became almost unbeatable in competitions. However, a shortage of these new model bikes pushed prices to a premium and most people were forced to settle for pre-war designs. These high prices led to greater competition, and greater competition lead to swifter and more innovative development. By the mid 1920s the overhead valve engine came into its own, with enhanced performance, and then the overhead camshaft engine allowed even greater potential. Internal expanding hub brakes kept safety in step with increased performance. The later 1920s brought about further significant changes when wired-on tyres came into general use and electric lighting replaced acetylene lights. Appearance was improved when chromium plating took the place of nickel and the saddle tank rendered the old flat tank superfluous.

Reprinted after a long absence! For the first time, the life of Edward Turner, one of Britain's most talented motorcycle designers, is revealed! Although seen by many as an irascible man who ran a very tight ship, it is an inescapable fact that Triumph was a highly profitable, industry pushing company. Turner's hugely successful sales campaign after World War 2 stunned American manufacturers, and had long-lasting repercussions on their own home market. No one can deny the impact his Ariel Square Four made at the annual Motor Cycle Show in 1931, his superbly-styled single cylinder Tiger models in 1936, and his revolutionary Speed Twin that dominated the Show in 1937. Even more was to follow with his post-war Thunderbird and Bonneville twins.