Shimano EW-JC304 Di2 Junction Box Color:Black Upper contains a minimum of

Upper contains a minimum of 50% recycled content

SL-M8130-IR11

24 mm internal width aluminum rim with 2-Way Fit™ technology for clincher or tubeless set ups

But occasionally

Shimano EW-JC304 Di2 Junction Box Color:Black Upper contains a minimum ofShimano EW JC304 Di2 Junction Box Shimano Di2 Frame Junction Box Connects via SD 300 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 Number of Ports: 4