Shimano EW-SD300 600 mm Di2 E-TUBE Electric Cable

The Shimano EW-SD300 is the E-TUBE electric wire developed for the latest Shimano electronic drivetrains and compatible eBike systems.

This 600 mm version is ideal for various internal or external routing configurations on road bikes, gravel bikes, MTBs and eBikes.

The new SD300 standard uses smaller connectors compared to the previous EW-SD50 system, allowing cleaner installation and improved frame integration. 

Shimano 12-speed Di2 compatibility

The EW-SD300 cable is compatible with Shimano’s latest electronic platforms:

• Dura-Ace Di2 R9200
• Ultegra Di2 R8100
• 105 Di2 R7100
• Shimano E-TUBE systems
• Compatible Shimano STEPS systems

It is specifically designed for Shimano’s newer SD300 connection standard. 

Compact design and modern integration

One of the most appreciated features among cyclists is the reduced cable and connector size.

• Approx. 2.4 mm cable diameter
• Smaller SD300 connectors
• Cleaner cable routing
• Improved internal frame integration

This makes installation easier on modern internally routed frames while improving overall bike aesthetics. 

Reliable Shimano E-TUBE connectivity

E-TUBE technology eliminates common issues associated with traditional mechanical cables such as contamination, friction, cable stretch and shifting degradation.

Shimano connectors are designed to provide:

• High reliability
• Stable electronic connection
• Water resistance
• Long-term durability

This ensures fast and precise electronic shifting even under demanding riding conditions. 

600 mm length

This 600 mm version is commonly used for specific Di2 routing configurations.

The ideal cable length always depends on frame geometry and internal routing layout.

Many cyclists use 600 mm cables for dedicated front drivetrain or cockpit connections on compact road and gravel bikes. 

Adapter compatibility

The SD300 system can also be connected to older EW-SD50 systems using the compatible Shimano EW-AD305 adapter.

This is especially useful during Di2 upgrades or mixed-generation setups. 

Main features

• Original Shimano electric wire
• E-TUBE SD300 system
• 600 mm length
• Compatible with Shimano 12-speed Di2
• Compatible with Shimano STEPS systems
• Compact SD300 connectors
• Ideal for internal routing
• Reliable and durable connections

Technical specifications

• Brand: Shimano
• Model: EW-SD300
• Type: E-TUBE electric wire
• Length: 600 mm
• Compatibility: Shimano Di2 SD300 / STEPS
• Cable diameter: approx. 2.4 mm
• Connector diameter: approx. 3.45 mm
• Use: road / gravel / MTB / eBike

Why choose it

• Compatible with modern Shimano Di2 groupsets
• Clean and tidy installation
• Reliable Shimano connectivity
• Ideal for internal frame routing
• Perfect for upgrades or replacements
• Precise and stable electronic performance