2piece tire liner set — lightweight puncture protection for multiple bike types What it does: Two polyurethane composite belts install inside the tire to shield the inner tube from glass, crushed stone, and road debris. The material's elasticity and shock absorption reduce flats by conforming to the tire under pressure without cutting or abrading the tube. Key benefits Prevents flats: Durable polyurethane composite provides longlasting defense against common puncture sources while absorbing impacts that would otherwise reach the tube. Ultralightweight: Designed for minimal added weight — about 64 g for 700C and up to 108 g for 29'. Versatile protection: Works on many bicycle styles and riding conditions, from daily commuting to offroad trails. Easy installation and sizing Installs quickly by attaching directly to the inside tire surface; no special tools required. Can be trimmed to fit tire sizes including 26', 27.5', 29', and 700C for a secure fit. Includes two liners so you can protect one wheel or both (depending on your setup). Compatibility and fit Designed for mountain, highway, folding, and dead fly bikes, and compatible with general types including road, commuter, and offroad bikes. Acts as a protective barrier that reduces tire wear and guards against erosion from repeated impacts. Practical use scenarios Daily commuter: Install on front and/or rear tire to reduce the risk of a puncture from glass or roadside debris on city streets. Gravel or light trail rides: Add protection on mixedsurface rides where sharp stones and debris are common. Longdistance or touring: Use as a preventative layer to minimize downtime and repairs on extended rides. Contents and material Includes: 2 punctureproof belt liners Material: Polyurethane composite Weights: 64 g for 700C; up to 108 g for 29' No special tools, quick to trim and fit, and designed to protect inner tubes without compromising tire performance.