Shimano Dura-Ace FC-R9100-P Left Crank Fixing Ring Description: This Shimano Dura-Ace FC-R9100-P Left Crank Fixing Ring works to complete assemblies used to affix left crank arms to spindles of Shimano Dura-Ace FC-9100-P cranksets. Features: Genuine replacement parts for Shimano cranksets Left crank arm fixing ring compatible with Shimano Dura-Ace FC-R9100-P cranks