Shimano saint cd50 chain guard guide setthis is the shimano cd50 saint chain guard and guide set iscg 03 mount it is shimanos new modular chain device for their saint crankset damper on lower guide prevents chain slap silencer on lower guide keeps things running smoothly and quietly featuring a mud shedding design for reliability and longevity includes bash guard section for sm cd50 modular chain device sections are specific to chainring size new saint is dedicated to dh racing new sa