The Shimano EW-SD300-I is a high-performance internal-routing electric wire for DI2 electronic shifting systems. Designed for sleek integration, it allows clean internal routing within the frame while maintaining reliable signal transmission between DI2 components.

Key Features:

• Type: E-TUBE Electric Wire – Internal Routing

• Model: EW-SD300-I

• Compact Design: Smaller and lighter than previous wires, reducing clutter inside the frame

• Future-Proof: Supports potential expansion of DI2 system capabilities

• Installation: Includes wire holder for secure and tidy internal routing

• Compatibility: Works seamlessly with Shimano DI2 components

Ideal For:
Cyclists seeking a clean, professional look and highly reliable internal DI2 wiring for modern electronic drivetrains.