Shimano dura ace r9100 2x11sp sti shifter setthe dura ace 9100 shifters have received an overhaul over previous editions with the aim of improving ergonomics and shifting efficiency they now feature a re designed brake hood that is more comfortable to grip especially for those with smaller hands the shifters also offer up to 14mm of reach adjustment the rear shifter features an improved lever stroke that is shorter than previous editions this allows for quicker shifts and requires less effor