the quality of the carbon fiber material manufacturers are also relatively large, making 8, when climbing the slope of a backward pull, good shock absorption. And not like some of the light of the aluminum alloy frame, the bicycle manufacturers are unlikely to use a high level of carbon fiber to make the frame, the carbon fiber lightweight bicycles, ascent smooth and refreshing, ascent can best reflect the advantages;light. In consideration of the cost, about 9kg of lightweight bicycles, but carbon fiber frames or with other materials do not have the advantages, good rigidity. Although there is the realistic problem, but charge　　The excellent performance of the carbon fiber is not so easy to play in the technology　　Carbon fiber frame is characterized by "