Plateau Intérieur 11V SHIMANO DURA ACE 9000 110mm Tooth profile:42 take the measurement at your it ensures the rider take the measurement at your natural waist The handlebar is equipped with two removable fairings for fitting extensions or computer mounts The SHIMANO Dura Ace 9000 110 mm inner chainring allows you to replace the worn chainring on your Dura Ace 9000 crankset in order to maintain reliable and precise pedalling without having to change the complete assembly This original 39 tooth chainring is designed to be mounted on the 4 arm crankset with a 110 mm diameter of the Dura Ace groupset as part of an 11 speed double drivetrain