1. Made of butyl rubber, providing stable air tightness, excellent airtightness, and good shock absorption for a safe and comfortable riding experience. 2. Quick inflation, reliable seal, leak-proof for long rides. 3. Quick inner tube installation, perfect for emergency repairs during outdoor cycling trips. 4. Thickened rubber structure, puncture and abrasion resistant, suitable for daily commuting, off-road riding, and mountain biking. 5. Compact and portable, can be used as a spare inner tube. 6. For tires ranging from 20×1.75 to 20×2.125.
