Puncture-proof flap insert for 20x4 e-bike and fat bike tires
This puncture-proof insert is designed to provide nearly complete 360° protection between the tire and the inner tube, drastically reducing the risk of punctures and pinch flats.

Placed between the tread and the inner tube, it adds 15 mm of protection under the tire and 2–3 mm on the sides, allowing lower pressures to be used without damaging the rim.
The result is a more comfortable, stable, and safe ride, with greater grip and vibration absorption on both asphalt and dirt roads.

Ideal for city bikes, mountain bikes, trekking bikes, and e-bikes with inner tubes. Installation is simple and its long life makes it the ultimate solution for those who want to ride without worries.

For any technical information regarding assembly and compatibility, our technicians are available at 3206140014, or via WhatsApp. Capobranco Project is not responsible for tampering or incorrect installation. Our products are stored and shipped from our headquarters in Italy.