Shimano dura ace 9000 2x11sp band 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 featuresnext generation light effort front shiftingoptimum spring tension provides feather light down shiftsupport bolt keeps correct position even when high torque pedalingcapacity 16tweight 76ga 2 year warranty is offered with all shimano products from