SHIMANO Di2 BT-DN300 BATTERY FOR INTERNAL MOUNTING over-2500 Ergo Bolton thumb structure with

Ergo Bolton thumb structure with stretchy areas

For specific compatibility concerns

While the pedal is double sided

Rear zippered pocket

SHIMANO Di2 BT-DN300 BATTERY FOR INTERNAL MOUNTING over-2500 Ergo Bolton thumb structure withWith the same size as its predecessor, the slim DN300 battery can be housed inside seat posts or frames ensuring a clean aesthetic. Now with 3 ports, the DN300 simplifies wiring to front and rear derailleurs, supplying stable power at all times. The third port is for riders who seek the redundancy of Shimano's 12 speed Di2 wired option. Features Shimano Di2 BT DN300 Battery for Internal Mounting Compatible with thinner next generation electric wire