Shimano used the Hollowtech II design from their XTR and Dura Ace lines to drop 150g from the new Saint FC-M810-1 Crankset and increase the crank arms’ stiffness by 200%. This super light yet burly crankset comes with heavy-duty steel inserts where the pedals attach to ensure bomber durability. This crankset is designed for use with a single chainring (34, 25, 38, 41, or 42T) and a bashguard (all sold separately).