SHIMANO Di2 EW-SD300 e-Tube Wire 1400mm — 2nd Gen slim, lightweight interconnect for Ultegra R8100 & Dura-Ace R9200

SHIMANO's 2nd Gen EW-SD300 1400mm Di2 e-tube wire is a lighter, slimmer connection cable that links Dura-Ace R9200 or Ultegra R8100 derailleurs to the Di2 battery for reliable electronic shifting.

Built from improvements originally developed for Shimano's e-bike systems, the EW-SD300 updates the classic Di2 wiring with a more compact profile and reduced weight. It replaces older Di2 cables and is offered in multiple lengths so you can route cleanly through a variety of modern road frames and e-bike setups. The 1400mm length gives generous reach for larger frames, long internal routes, or creative cable routing needs.

How does this wire improve my Di2 drivetrain's routing and weight?

The SD300 uses slimmer conductors and modern insulation to shave bulk and mass compared with previous e-tube wires. That means neater internal runs and a small overall weight reduction—helpful when every gram and tidy cable channel matters on high-performance builds. It also flexes more easily for tight internal bends and underneath bottom brackets.

• Smaller cross-section for tighter internal routing and improved frame compatibility
• Reduced weight versus older Di2 wires for marginal performance gains
• Flexible construction eases installation in curved or confined frame passages

Which drivetrains and systems is the EW-SD300 compatible with?

This generation of e-tube wire is designed for Shimano road 12-speed Di2 groups: Ultegra R8100 and Dura-Ace R9200, and it shares technology with the EP800 e-bike drive series. It functions as the interconnect between derailleurs, junctions, and the Di2 battery in supported systems. Always check connector orientation and required cable length for your frame before replacing wires.

• Direct compatibility with Ultegra R8100 and Dura-Ace R9200 Di2 components
• Compatible with EP800 e-bike drive communication where wiring standards match
• Works as derailleur-to-battery or junction cabling depending on system layout

What should I know before installing the 1400mm length?

Measure your frame's internal routing path including any additional slack needed for handlebar rotation and service access. The 1400mm length suits larger frames and complicated internal runs, but excess cable should be coiled neatly and secured to avoid rattles. Use the proper Di2 connector orientation and gentle bends; avoid sharp kinks which can damage the conductor or housing.

• Ideal for larger frames or long internal routes requiring extended reach
• Leave modest service slack and secure excess to prevent noise
• Avoid sharp bends; route following manufacturer's cable guides where possible

How durable is the EW-SD300 and what support does Shimano offer?

The EW-SD300 inherits improved materials aimed at longevity and resistance to repeated flexing, drawing on Shimano's e-bike wiring expertise. It carries Shimano's typical 2-year manufacturer warranty for peace of mind. For field repairs or replacements, handle connectors and cable ends with care to maintain reliable electrical contacts.

• Enhanced materials for flex resistance and extended service life
• Backed by Shimano's 2-year manufacturer warranty
• Store spare lengths and keep connectors clean for consistent performance

Who is this for? The EW-SD300 1400mm is aimed at riders upgrading or maintaining modern 12-speed Shimano Di2 systems—especially those with larger frames, internal routing challenges, or riders who value tidy, lightweight wiring. It's a sensible spare for mechanics, bike shops, and touring cyclists who need extra reach and reliable electronic shifting connectivity without reverting to bulkier legacy cables.