To become the most reliable source of cranksets for the world bikes is our target after Prowheel was founded. We have been concentrating on the quality improvement and equipment expansion persistently in order to accomplish this goal. Prowheel has sufficient facilities，wild production range and efficient manufacturing process to meet customer’s needs. Except for headquarter in Shanghai, there are subsidiary factories in Shenzhen and Tianjin, and there are offices in Taiwan, which are operated to provide various needs for the worldwide clients. Keen to make continuous progress，we have implemented 5S management system，developed Learning Organization and strengthened the ODM capacity. In addition，Prowheel was authorized by VIA （Vehicle Inspection Association），the Japanese quality requirement as the first non-Japanese bike company which passed through the tough quality test in 2004. Heading for the 18th year，we are here to present you the best choice of transmission. Prowheel not only represens bicycle components but also brings you great marvel！