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• Ultra-Thin and Ultra-Light Inner Tube By CST Product Information: * Brand: CST * Valve: AV/FV * Origin: Taiwan, China * Material: Butyl rubber * Weight: ≥70g * Wall thickness: 0 Features: 1 34% or extra lighter than ordinary inside tubes 2 Good air tightness and toughness 3 The type of internal tube is suitable for most models four This inner tube can reach the level of racing competition As we all know, the lighter the bicycle, the speedier the trip Most of the final weight of the bike comes from the frame and tires (inner and outer) Showcase

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