Shimano saint fcm820 m825 single chainringsshimano say they were aiming for five things with their new saint m820 gravity group stability silence efficiency durability and ergonomics the shimano saint sm cr82 10 speed chainring is a replacement part for the fc m820 or fc m825 front crankset that is designed to be used with a single chainring and is available in 34t 36t and 38t ratios featurescr82 saint chainring is engineered to meet the demands of todays hard hitting riders7075 anodized