Pay in 4 interest-free payments of $9.47 Learn more
Ships within 48 hours · Estimated delivery Sep 29 - Oct 4
Removable presta valve core
ah sorry – riders that slog it out all day into those nasty headwinds
The rim design enables the maximum amount of aerodynamic penetration when the wind angle is between 12° and 19°
Especially designed to keep your tool
Shimano SM-JC41 Di2 Internal Junction B Box MTB Removable presta valve coreFor internal DI2 wire routing, SHIMANO's SM JC41 Junction B is the central connector for DI2 systems. Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4 port SM JC41 junction, which is housed inside the bike frame. Specifications For internal wire routing Mfr Claimed Weight 4. 1g
