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Shimano2 Port Junction EW-JC302(Return to Product Page)

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User submitted reviews

Review by RichBklyn

Handy for updating firmware on 12sp Di2 wireless shifters

by RichBklyn

Cycling Enthusiast

New York City

I used this to connect my normally wireless shifters to the battery (seatpost) in order to update the L and R shifter firmware. A lot easier than pulling out the battery in the seatpost.

Reviewed 4/15/2023

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Review by Brian g

Perfect for updating 12 speed shifters

by Brian g

To update 12 speed shifter software, disconnect wire from front derailleur, connect this junction to wire, then connect a second wire to the shifter. Use Shimano software. Boom.

Reviewed 3/6/2023

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