It's an adapter and it works , nothing more to say
Product Details
Shimano EW-AD305 SD300 to SD50 Conversion Adapter
The EW-AD305 SD300 to SD50 Conversion Adapter allows the older Shimano Di2 SD50 E-Tube wires to be connected to the newer, slimmer EW-SD300 wires. It provides a secure and reliable connection that is stable and water-resistant.
Features
- EW-SD300 wires use a slim 3.45mm diameter plug, they can be connected to the 5.1mm EW-SD50 wires with the use of EW-AD305 adapter
- Reliable and secure water-resistant connection
Specifications
- Discipline Compatibility
- Road
- Brand Compatibility
- Shimano
- Component Type
- Junction
- Electronic System
- Di2
- Family
- Di2
- System Type
- Electronic
- Product code
- 1547718 / 54295510974810
Reviews
Shipping & Returns
Free UK delivery on orders over £50. Orders are dispatched within 1-2 working days and typically arrive 1-2 working days later.
Return unused items in their original packaging within 30 days of delivery. Return postage is £3.50.
Q & A
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About Shimano
Shifting the way the world rides.
From a single Osaka workshop in 1921, Shimano has grown into the world's most influential component maker. The brand's relentless engineering — Dura-Ace, Ultegra, GRX, XTR — has shaped the way the world shifts, brakes and rides, on the road and off it.
Shimano's flagship groupset, Dura-Ace, has been the benchmark for top-level road components for more than five decades. Every refinement that lands on Dura-Ace eventually shapes the entire Shimano range, all the way down to entry-level drivetrains.





