Precision engineered dura ace sti lever for the ultimate in powerful braking and effortless 11 speed shifting making it the global choice for road racings elite riders key features dura ace r9100 sti are lightweight thanks to carbon fibre lever blades carbon composite bracket body and a titanium clamp band fixing bolt shift cables routed under the bar tape using polymer coated inner wires make for a smooth shift action providing faster lighter shifting vivid index shifting with s