齒盤 RA2-721C

RA2-721C

曲柄: 170 (Forged AL6061-T6)
齒盤: 39/53T (AL-7075.CNC)
中軸:Taper Square 116mm/M8
鍊線: 43.5mm
BCD: 130mm
變速: 2x9s/2x10s