Shimano SW-R9160 Dura-Ace Di2 TT Bar End Shifter Set Bike-Hydration-Hydration Systems-Rear Mount This is not just a

This is not just a temporary fix

2 x EPDM mounting O-rings (Small)

the Uncollar++ helps ensure an effective seal from water entry at high speeds

100 mg calcium

Shimano SW-R9160 Dura-Ace Di2 TT Bar End Shifter Set Bike-Hydration-Hydration Systems-Rear Mount This is not just aA single programmable shifter button in each unit, designed to fit cleanly into aerobar extensions. Works perfectly with Shimano's Di2 Synchro Shifting: each "up" shift moves to the next gear ratio considering both front and rear derailleurs, each "down" shift does the reverse. Requires Shimano 9100 Di2 drivetrain. Can be installed as sole shifting point or used in conjunction with STI or brake lever Di2 controls. Shimano's Di2 technology provides