Features of the Shimano Ultegra Di2 ST-R8060 Shift/Brake Lever Set 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 2x11-Speed Sl position adjust Specifications Average weight: 138g/pair Generation: Ultegra DI2 R8050 Rear speeds: 11 ST SL: ST Shifter type: TT/triathlon Dual control lever