Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port Largest Cog-28 The new Wolf Tooth 6-Bit

The new Wolf Tooth 6-Bit Hex Wrench is a slim strong multi-tool with 11 functions for common bike repairs and everyday needs

200 Lumens flashing

Li-ion battery CREE LED Texas Instruments integrated circuit

Up to 50% more clamping force than standard quick releases

Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port Largest Cog-28 The new Wolf Tooth 6-BitShimano SM JC41 Di2 Internal Frame Junction Box 4 Port. Shimano Di2 Frame Junction BoxFrame Junction Box connects via SD50 E tube wires to four different points: front derailleur rear derailleur cockpit junction box and battery mount All Di2 components on the bicycle require the same firmware version. Using Di2 components with different firmware versions may cause malfunctions Use Di2 system checker to update component firmware from http: e