Shimano Di2 Battery BT-DN300 Seatposts The perfect reference guide for

The perfect reference guide for nearly any level mechanic and every bike

and encased in an ultra-durable Grilamid TR-90 frame

Every time we see someone mixing up PH in a G@t*rade bottle

Wear the Flash Reflective Sock on your daily commute or on any ride that will start early or finish late

Intuitive shifting control

Shimano Di2 Battery BT-DN300 Seatposts The perfect reference guide forThe 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