Bridgestone Corporation is a multinational rubber conglomerate founded in 1931 by Shojiro Ishibashi in the city of Kurume, Fukuoka, Japan. The name Bridgestone comes from a calque translation and transposition of ishibashi, meaning "stone bridge" in Japanese.
Road Racing World Championship Grand Prix is the premier championship of motorcycle road racing. It is currently divided into three classes: MotoGP, Moto2 and Moto3. All three classes use four-stroke engines. In 2010, 250cc two-strokes were replaced by the new Moto2 600cc four-stroke class. In 2012, 125cc two-strokes were replaced by the Moto3 250cc four-stroke class with maximum weight limit 65kg with fuel, and the engine capacity for MotoGP increased from 800cc to 1,000cc.