Shimano Dura-Ace FC-9000 Crank Fixing Bolt, 2nd version (1 req.) 16mm depth fixing bolt, only fits Dura-Ace FC-9000 cranksets manufactured after 6-1-2013 2nd version of OEM fixing bolt for Dura-Ace FC-9000 cranksets Shimano Crank Arm Fixing Bolts