Silca Seat Roll Asymmetrico Fox Factory SHIMANO's SM-JC41 Junction B is

SHIMANO's SM-JC41 Junction B is the central connector for DI2 systems

they cross continents without wearing out

Drop Shape: Compact

while carbon rims require non-metal levers to resist damage to the bead or brake surface during use

Silca Seat Roll Asymmetrico Fox Factory SHIMANO's SM-JC41 Junction B isA sleek and compact seat roll designed to store everything you need for flat repairs or light mechanicals out on the road or trail. For the uncompromising cyclist who appreciates the meticulous packing of and the organized work area of an unfurled seat roll, plus the quiet ride only possible with the 15x stronger than Velcro power of the BOA closure system. (and those who hate rattling, swaying, swinging seat bags dangling off the back of the saddle!)