曲柄: 170,172.5,175mm (Forged AL6061-T6) 齒盤: 39/53T (Alloy) 中軸: Cups-BC-1.37x24/68mm/73mm 鍊線: 43.5mm BCD: 130mm 變速: 2x9s/2x10s 重量: 730g
曲柄set RA3-721C-NT