Shimano slx fcm670 10 speed triple chainringsride shimano and enjoy the benefits of their no compromise attitude shimano use the best materials for unrivalled performance for use with shimano slx fc m670 10spd triple chainset 42 32 24tcan also use 42t outer chainring from the shimano deore xt fc m780 or shimano slx fc m660 10 10spd triple chainsets these are a b match which indicates that the parts are usable but differ in materials appearance finish size etc features10spd dyna sysdy