Bicycle Derailleur Plug – Carbon Frame Brake Cable Stop Di2
Bicycle Derailleur Plug – Carbon Frame Brake Cable Stop Di2
Keep your carbon frame looking clean and your cables perfectly routed with this Bicycle Derailleur Plug & Brake Cable Stop. Designed to fit oval cable ports on carbon and alloy bicycle frames, these compact rubber stoppers are compatible with Di2 electronic shifting systems, derailleur cable guides, and brake cable entry points. A must-have finishing touch for any custom build or cable re-route job.
Product Highlights
- Precise Fit: Oval profile designed to fill and seal cable stop holes on carbon frames neatly and securely.
- Di2 Compatible: Works with Shimano Di2 electronic groupset cable/wire ports as well as traditional derailleur and brake cable stops.
- Durable Rubber Material: Made from flexible, weather-resistant plastic/rubber that holds its shape over repeated use and cable changes.
- Compact Size: Measures 3 × 1.5 cm (1.18 × 0.59 in) — a perfect fit for standard oval frame port openings.
- Two Color Options: Choose from 2 color variants to match or complement your frame finish.
- Neat Aesthetic: Closes unused cable ports cleanly, blocking dust and debris from entering the frame interior.
- Easy to Install: Simply press into the oval frame port — no tools or adhesives required.
- Great Value: Sold as a set, giving you spares for future builds or replacements.
Specifications
| Material | Rubber / Plastic |
| Size | 3 × 1.5 cm / 1.18 × 0.59 in |
| Port Shape | Oval |
| Compatibility | Carbon & alloy frames, Di2, derailleur & brake cable stops |
| Color Options | 2 available |
Who Is This For?
Whether you're building up a new carbon road or gravel bike, upgrading to Di2 electronic shifting, or simply tidying up unused cable ports on an existing frame, these derailleur plugs deliver a clean, professional finish. They also make a thoughtful, affordable addition to any cyclist's tool kit or spares bag.
Learn More
For tips on bicycle maintenance and safe cycling practices, visit the U.S. Consumer Product Safety Commission – Bicycle Safety resource.
Frequently Asked Questions
Q: What are bicycle derailleur plugs used for on a carbon frame?
A: Bicycle derailleur plugs are used to seal unused or open cable stop holes on a carbon or alloy frame. They keep the frame's interior free from dust, moisture, and debris while giving your build a clean, finished look. The oval shape is specifically designed to match the oval cable port openings found on many modern carbon frames.
Q: Are these cable stop plugs compatible with Shimano Di2 electronic shifting?
A: Yes. These oval rubber stoppers are compatible with Di2 electronic groupset wire ports as well as standard mechanical derailleur cable stops and brake cable entry points. They are a versatile solution for both electronic and traditional cable-routed builds.
Q: How do I install the derailleur plug into my carbon frame?
A: Installation is simple — no tools are required. Align the oval plug with the corresponding oval port on your frame and press it firmly into place. The flexible rubber material creates a snug, secure fit that stays in position during normal riding conditions.
Q: What size are these bicycle cable stop plugs?
A: Each plug measures 3 × 1.5 cm (approximately 1.18 × 0.59 inches), matching the standard oval cable stop port dimensions found on many carbon road, gravel, and mountain bike frames.