Shimano dura ace 9000 2x11sp braze on front mechwith a revised actuation ratio in combination with the st 9000 shifter and polymer coated cables the new dura ace front derailleur delivers both a shorter stroke at the lever and reduced effort this is as smooth as mechanical shifting gets this derailleur features a standard braze on mount features next generation light effort front shifting optimum spring tension provides feather light down shift support bolt keeps correct position even when h