Shimano Dura-Ace R9160 Di2 TT Bar End Shifters, 1-Button Design, Syncro Shift compatible sh Mesh-lined inner vents help you

Mesh-lined inner vents help you dump heat and moderate your temperature when the sun comes out

this outer layer withstands the harshest conditions with ease while still letting our skin breathe and our shoulders move restriction free

1-1/8" Upper Bearing  -  41

Compatible with most popular cable-actuated dropper seatposts and remotes

The full cap design adds stability and control

Shimano Dura-Ace R9160 Di2 TT Bar End Shifters, 1-Button Design, Syncro Shift compatible sh Mesh-lined inner vents help youShimano's Dura Ace SW R9160 TT bar end shifters feature a refined ergonomic shape and simple, single button design. Provides quick shifting while riding in the aerobars Utilizes Shimano synchronized shift program allowing each bar end shifter to be programmed to upshift or downshift the rear derailleur while the Di2 computer decides when to shift the front derailleur for the optimal front and rear gear combination Firmware updates available through