Shimano EW-RS910 Di2 Junction A Bar End Plug 2 Port Bike-Hydration-Bottles & Cages-Cages Internal cooling system moves air

Internal cooling system moves air through the trainer to keep it cool while active thermal sensors ensure accurate performance data even during the hardest of workouts

Its four easily accessible exterior pockets are designed to end the risk of dropping small vitals when they are needed most

The wrap-around eye shield offers an unblocked field of view with a huge aerodynamic benefit and the shield is made by ZEISS Optics for unrivaled clarity

For cyclists

Shimano EW-RS910 Di2 Junction A Bar End Plug 2 Port Bike-Hydration-Bottles & Cages-Cages Internal cooling system moves airShimano's "A junctions" such as the EWRS910 are used to connect E tube cables coming from Di2 shifters to the down tube E tube wiring. Shimano's Di2 electrical drivetrain system eliminates poor shifting caused by dirt, corrosion and stretching while providing effortless, reliable, shifting. For either specific frame mount or handlebar end plug mount 2 port design Battery level indicator feature Additional charging point when using internal battery