Shimano is a Japanese multinational manufacturer of cycling components, fishing tackle, and rowing equipment. The company was founded in 1921 and the first product put on the market was to freewheel mechanism for bicycles Shimano product sales constitute 50% of the global bicycle component market. Its products include drivetrain, brake, wheel and pedal components for road, mountain, and hybrid bikes. The components include: crankset comprising cranks and chainrings; bottom bracket; chain; rear chain sprockets or cassette; front and rear wheel hubs; gear shift levers; brakes; brake levers; cables; front and rear gear mechanisms or dérailleurs. Shimano Total Integration (STI) is Shimano's integrated shifter and brake lever combination for racing bicycles. The Italian firm Campagnolo as well as US based SRAM are Shimano's primary competitors in the cycling marketplace.