Shimano Di2 Battery BT-DN300 Tifosi TYR Durafast One®: 100% Polyester

TYR Durafast One®: 100% Polyester

Wind Blocking front / ear panel

But plastic and fibre don’t do a good job of supporting bearings

cycling awareness and smart connectivity

& 50 grams lighter than the previous GP5000 tubeless model

Shimano Di2 Battery BT-DN300 Tifosi TYR Durafast One®: 100% PolyesterThe new Shimano Di2 BT DN300 battery features the same waterproof design that Di2 users have loved for generations. Now with 3 ports, it delivers stable power to Shimano's 12 speed road derailleurs and shifters (if a fully wired option is selected). The same size as its predecessor, the slim DN300 battery can be housed inside seat posts or frames ensuring a clean external aesthetic. Now with 3 ports, the DN300 simplifies wiring to front and rear