Shimano Di2 E-Tube EW-SD300 electric cable

Optimise the connectivity of your electronic drivetrain with the Shimano Di2 E-Tube EW-SD300 cable, designed for the latest generation of 12-speed road groupsets. This cable transmits data and power between the various Di2 components (derailleurs, battery, controls), ensuring smooth, ultra-precise operation.

Thanks to its slimmer, more compact design than the previous generation (EW-SD50), it facilitates internal integration into modern frames and improves the overall aesthetics of the bike. Its reduced diameter (around 2.4 mm) means it can be fitted more discreetly while maintaining excellent reliability.

Available in several lengths (from 150 mm to around 1600 mm), it can be adapted to all configurations, whether for connecting the internal battery to the rear derailleur or connecting the various cockpit components.

We advise you to be optimistic when calculating the length - you can never have too much length...

Key points

• Official cable Shimano E-Tube SD300 (new generation)
• Di2 12-speed compatible (Dura-Ace, Ultegra, 105)
• Reliable transmission of signals and power
• Slim, compact design for modern integration
• Secure, waterproof connectors
• Available in multiple lengths

Technical specifications

- Electrical wiring harness for Shimano DI2 12-speed road groupset
- BT-DN300 battery compatible
- Diameter 2.4mm
- Socket diameter 2.45mm
- Lengths: 300/400/500/600/800/900/1000/1200mm
- Reference Shimano: EW-SD300
- Make Shimano

FAQ

What's the difference with the EW-SD50 cable?
The EW-SD300 is thinner, lighter and only compatible with Di2 12-speed groupsets. The connectors are different and not interchangeable.

Is it compatible with the old Di2 11v groupsets?
No, the old groupsets use the EW-SD50 standard.

What length should I choose?
This depends on the assembly (frame, internal/external routing). We advise you to measure precisely or follow the manufacturer's recommendations.

Can I fit it myself?
Yes, but we recommend using the Shimano TL-EW300 tool to avoid damaging the connectors.