Reviews over the
Shimano Di2 E-TUBE EW-JC130
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4 / 5
Unnecessary expense and weight
- mark atkinson, 30 July, 2019
This cable is not required! You can connect you STI together with a 550mm piece of cable and still have ports for sprint/hill shifters. The one port spare can be used to connect to the handle bar plug and another back to you power source. Lighter cheaper and works perfectly.
Pros & Cons
Extra port for hill and sprint shifter
simple,
Dont need it