自行车构造词汇表
gear change mechanismthree-speed gearchainchain guardsprocket wheelchain wheelto pedalmudguardpedalvalveinner tubetyrerimbutterfly nutwing nutspokefront wheelball bearingreflectorrear lightfront lightlamplamp bracketdynamofront forkgear changegear levercrossbarlightweight framecarriersaddlebagsaddle springssaddlebrake cablebrake rubberbrake shoebrake handleback brakefront brakehooterbellhandlebar gripsdrop handlebarsracing handlebarshandlebars