Shimano EW-JC304 Di2 SD300 4-Port Junction Box Insulating Medium-High volume feet tend to

Medium-High volume feet tend to be wider with higher arches and insteps

The Asolo/Vibram AG outsole features a self-cleaning design and excellent climbing area

Field Cleanable Yes

Dual access stretch mesh side pockets for storing water bottles and other gear with InsideOut side compression straps

Shimano EW-JC304 Di2 SD300 4-Port Junction Box Insulating Medium-High volume feet tend toThe 2nd generation Di2 e Tube wiring system from Shimano has the SD300 designation. These wires and connectors are thinner than the SD50 generation. if you need to join two wires to one (3 total wires), or two pairs of SD300 wires to create a longer length for both pairs (4 total wires), you will need this EW JC304 Di2 SD300 4 Port Junction Box. This is actually a simple looking dual tube connector with internal ports on both ends of each side that