Shimano dura ace fc r9100 p power meter chainset 5034 double 175mm
With several years of development and working closely with professional teams you can expect extreme accuracy from shimanos first fully integrated power meter hollowtech ii 11 speed dura ace chainset features accurately calibrated strain gauges are integrated inside both left and right crank arms this provides a stable measurement system through rotation from both sides for extremely precise data 2 accuracy of strain gauge measured power bluetooth and ant with wireless firmware update