Shimano dura ace 7900 2x10 speed sti shifterprecision engineered dura ace sti lever for the ultimate in powerful braking and effortless 10 speed shifting making it the global choice for road racings elite riders features dura ace 7900 sti are lightweight thanks to carbon fibre lever blades carbon composite bracket body and a titanium clamp bandfixing bolt shift cables have been routed under the bar tape re development and positioning of the internal mechanism in combination with ptfe coat