Suong Chang Machinery Co., Ltd. is a well established factory specializing in designing & manufacturing high quality and efficient production machinery for bicycle tubing parts. With 12 years experience in making production machinery for bicycle tubing parts: you can rest asured that Suong-Chang knows how to make good tubing parts for bicycles. Suong Chag has been devoted to developing new bicycle frame designs for several years. Now with great honor, Suong Chang presents its new patented designs & has been awarded the best styles suspension frames.