3g Original Shimano parts guarantees that all components work perfectly for optimum performance and maximum safety and longevity. Reduced drag through a more aerodynamic design Eliminated the switch box of ST-6871 to make the design smaller and shorter Intuitive shifting control Keep firm when shifting Single button on each side of the shift lever only works with Synchronized Shift Series color 3G 3109902(266-268)11/14 60922(2: 6/23eta----1:RTN ON 10/12/22