Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port Model Name-Tail Lux twist resistant street crank Tubular

twist resistant street crank Tubular heat-treated 4130 crmo arms & crmo axle

clean welded joint and stainless steel eyelets

Brake Lever Clamp 22

Outfitted with Terry's Urban chamois it's ideal for rides of 1-2 hours

5 56mm total offset on 29") Gray

Shimano SM-JC41 Di2 Internal Frame Junction Box 4-Port Model Name-Tail Lux twist resistant street crank TubularShimano 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 tubeproject. shimano. com