ALEX10907 wrote:請問~這樣改雙盤要購...(恕刪) 買一片39T盤500(可以直上原廠52盤)!!中變轉接座750~1150!!左把(撥把貨轉把)要看轉把很便宜!!中變650~1100!!變速線很便宜100元就有摟!!鏈條不用換!!