TONGTU BICYCLE (GUANGZHOU) CO., LTD. GELEISEN Mid Motor Ebike 28" AL6061 Frame & Front Suspension Fork with Shimano Alivio 9 Speed Derailleur Electric Mountain Bicycle_TONGTU BICYCLE (GUANGZHOU) CO., LTD. is a full chain technology-based Electric Bicycle enterprise that integrates production, research and development, sales, and after-sales service. Its brand GELEISEN E-bike are popular worldwide.