Bike Frame Cable Hole Plugs – Derailleur & Brake Line Covers

Keep Your Bike Frame Clean & Protected

These Bike Frame Cable Hole Plugs are a must-have finishing touch for any road, gravel, or mountain bike build. Designed to neatly seal internal cable routing holes on your bike frame, they prevent dirt, moisture, and debris from entering the frame while giving your build a polished, professional look.

Why You'll Love These Cable Hole Plugs

• Perfect Fit: Available in 3.5mm and 6mm sizes to suit a wide range of frame hole diameters used for derailleur and brake cable routing.
• Durable Nylon Construction: Made from high-quality plastic nylon that resists wear, UV exposure, and everyday riding conditions.
• Clean Finish: Snap securely into frame ports to eliminate unsightly open holes and give your bike a clean, factory-built appearance.
• Two Color Options: Choose from available color variants to match or complement your frame's finish.
• Lightweight & Unobtrusive: Minimal added weight — you won't even notice they're there, but you'll definitely notice the difference in appearance.
• Easy Installation: Simply press into place — no tools required. Ideal for home mechanics and professional bike builders alike.

Product Specifications

• Material: Plastic Nylon
• Sizes: 3.5mm / 6mm
• Colors: 2 options available
• Compatible With: Road bike frames, gravel bike frames, MTB frames with internal cable routing ports
• Application: Derailleur cable holes, brake cable holes, general frame port plugs

Great For

• New bike builds and frame upgrades
• Tidying up unused cable routing ports
• Protecting internal frame channels from dirt and moisture
• Cyclists who take pride in a clean, well-maintained build

For more information on bicycle safety and maintenance best practices, visit the U.S. Consumer Product Safety Commission's Bicycle Safety resource.

Frequently Asked Questions

Q: What sizes are these bike frame cable hole plugs available in?

A: These cable hole plugs are available in two sizes — 3.5mm and 6mm — making them compatible with a wide variety of road, gravel, and mountain bike frames that feature internal cable routing ports for derailleur and brake lines.

Q: What material are the bike frame hole plugs made from?

A: The plugs are crafted from durable plastic nylon, which offers excellent resistance to everyday wear, moisture, and UV exposure, ensuring they stay securely in place over the long term.

Q: Are these plugs easy to install without professional tools?

A: Yes! Installation is tool-free — simply press each plug into the corresponding cable port on your bike frame and they snap securely into place. They're perfect for home mechanics and seasoned builders alike.

Q: Will these plugs fit my road or mountain bike frame?

A: These plugs are designed for frames with standard internal cable routing hole sizes of 3.5mm or 6mm. They are suitable for road bikes, gravel bikes, and mountain bikes with internal derailleur and brake cable routing.