Shimano SM-JC40 Junction B External Wire Routing 4-Port

5 out of 5 Customer Rating

The Details

For external DI2 wire routing, Shimano's SM-JC40 Junction B is the central connector for DI2 systems.


Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4-port SM-JC40 junction, which is mounted under the bottom bracket. This means that the wires can be neatly integrated alongside the frame and gain some protection from the elements.

Our Verdict

For external DI2 wire routing, SHIMANO's SM-JC40 Junction B is the central connector for DI2 systems.

Delivery

Parts, accessories and clothing delivery - FREE over £30

Delivery for parts, accessories and clothing is free over £30 and £2.99 below that. We have a selection of premium delivery services available, including next day, AM, Saturday, timed delivery and local pickup services. Mainland UK only, some remote and off-shore areas or areas of Scotland may incur a surcharge. Delivery options and lead time estimates will be provided in checkout.

Click & Collect

Our Click & Collect service offers all the benefits of shopping online, combined with an award-winning retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you - our stores are open 7 days a week. Best of all, the service is completely free.

Reviews

Your Questions Answered

For external DI2 wire routing, Shimano's SM-JC40 Junction B is the central connector for DI2 systems.


Wires from the front and rear derailleurs, cockpit area, and battery all plug into the 4-port SM-JC40 junction, which is mounted under the bottom bracket. This means that the wires can be neatly integrated alongside the frame and gain some protection from the elements.

For external DI2 wire routing, SHIMANO's SM-JC40 Junction B is the central connector for DI2 systems.

Parts, accessories and clothing delivery - FREE over £30

Delivery for parts, accessories and clothing is free over £30 and £2.99 below that. We have a selection of premium delivery services available, including next day, AM, Saturday, timed delivery and local pickup services. Mainland UK only, some remote and off-shore areas or areas of Scotland may incur a surcharge. Delivery options and lead time estimates will be provided in checkout.

Click & Collect

Our Click & Collect service offers all the benefits of shopping online, combined with an award-winning retail experience in one of our stores. Simply order your items, select Click & Collect and pick up your item at a time that's convenient for you - our stores are open 7 days a week. Best of all, the service is completely free.

Finance your purchase with us today and spread the cost.

Purchase Price £30.99
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Rutland Water Cycling LTD (Reference number: 800269) trading as Rutland Cycling are an appointed representative of Specialized (UK) Retail Limited (Reference number: 976130) which is authorised and regulated by the Financial Conduct Authority for credit broking. Credit is subject to status and affordability, and is provided by Mitsubishi HC Capital UK PLC. Terms & Conditions Apply.