SPEEDLAB technology is specialized in the design and production of all kinds of revolutionary bicycles parts, including bicycles wheels, hub, crankset ,etc We are a creative and passionate group with factory being located in Shanghai . All the products thoughts have been come from our founders ‘ long time’s cycling experience. Sonic is the high level carbon wheel set under Speedlab. All the wheels have adopted SPEEDLAB twin- spindle contracture hub , very strong and stiff under the condition of super light request .