Cycle Parts BD - SHIMANO FC M523 Black 9/10 Speed Octalink... | Facebook
FC-M523 | SHIMANO BIKE-EU
Bikesmith - MODEL NO FC-M523 SERIES SHIMANO Color Black, Silver Bike Type MTB Axle length of BB-UN/ ES (mm)_Threaded (normal) 118 Arm adapter ✓ Chain line (mm) 50 Chain ring combination 40