齒盤 RA6-722C-NT

RA6-722C-NT

曲柄: 170mm (Forged AL6061-T6)
齒盤: 34/50T (AL-7075.CNC)
中軸:Cups-BC-1.37x24/68mm/73mm
鍊線: 43.5mm
BCD: 110mm
Speed: 2x9s/2x10s
Weight: 810g