US$ 32.98
quiet braking
the Protone Icon helmet features the latest technological advances in safety
easy access storage
With an integrated chain stabilizer mechanism
Di2 Battery BT-DN300 Front quiet brakingThe new 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). With 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
US$ 32.98
US$ 63.20
US$ 196.50