Bontrager

Self-sealing to keep you rolling Protect yourself from flats with these specially-designed Self-Sealing tubes that instantly seal small hole punctures. Premium-quality butyl rubber tubes feature a 0.9mm wall thickness for the perfect balance of weight savings and durability. Product details - 0.9mm wall thickness - Specifically engineered formula instantly seals small holes from puncture flats - 100% inspected for guaranteed quality 27-inch tire size equivalents - 700c x 23 – 25 also fits 27 x 7/8 – 1 - 700c x 28 – 32 also fits 27 x 1-1/8 – 1-1/4 - 700c x 35 – 44 also fits 27 x 1-3/8 – 1-3/4