Shimano Ultegra ST-R8050 Di2/Caliper Brake Lever Left 2 Speed Model=Gossamer Tandem Crankset Ride for up to 24

Ride for up to 24 hours before needing a new charge

Robert Axle Project thru axles allow modern frames to be used with axle mount trainers

Compatible with both road and mountain bike brakes

From quick jaunts across town to endurance events to journeys across continents the GS1 Evo is a new favorite among many riders

Shimano Ultegra ST-R8050 Di2/Caliper Brake Lever Left 2 Speed Model=Gossamer Tandem Crankset Ride for up to 24Shimano Ultegra ST R8050 Di2 Caliper Brake Lever Left 2 Speed. Ultegra ST R8050 Left Brake & Lever SetCompatible with caliper brakes Clearer separation between the buttons ensures precise shifting even when the driver wears thicker gloves Multi Shift can be switched on or off individually for each switch The buttons under the top cover can be programmed to control third party devices All features are customizable with Shimanos E Tube app or PC