mountain bike - Alternatives to Crankset Shimano M523 Octalink 40-30-22T - Bicycles Stack Exchange
Shimano FC-M523 96mm BCD Outer Chainring
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