齒盤 FA4-723C-NT

FA4-723C-NT

曲柄: 170,172.5,175mm (Forged AL6061-T6)
齒盤: 46/56T(AL7075-T6 CNC)
中軸:Cups-BC-1.37x24/68mm/73mm
BCD: 130mm
鍊線: 43.5mm
Speed: 2x9s/10s
Weight: 800g