RIDENOW 2 Pack TPU Bike Inner Tube 700C x 18-32C / 32-47C (ALLRoad & Gravel) / 650B / 650C / 520, Presta Valve, Lightweight 36g (700C x 18-32C (65mm Valve, 2-Pack))

TPU(Thermoplastic polyurethane): the newest technological advance in bicycle inner tubes - as the fastest rolling, the most durable, and the lightest weight. It also appears to be more sustainable as it requires less raw material and is readily recyclable. Cost Savings: Are TPU inner tubes really four times the price of butyl inner tubes? Maybe that was the case two years ago. However, Ridenow TPU inner tubes are highly competitive on Amazon. Compared to other TPU inner tubes, our prices are only 50%~70% of theirs, and for some sizes, they are even approaching the cost of butyl rubber. We believe that in the near future, as technology matures, TPU prices will continue to decrease. Variety of Sizes: Our TPU inner tubes are available in almost all common sizes on the market. We offer a more professional and comprehensive experience than other TPU inner tubes that only offer a limited range of sizes. For example, 520 size is compatible with Georgena Terry Classic bicycle 24inch front wheel (1980s). High-Strength: It offers durability and wear resistance, extending its lifespan for different road conditions. Fastest Speed: With superior rolling resistance compared to butyl and latex inner tubes, it entices a faster and more exhilarating ride. Compact and Portable: Weighing just 36 grams(700C x 18-32C), 45 grams (700C x 32-47C), 28 grams (650). Weighing and occupying only 1/3 compared to butyl inner tubes, our TPU tubes are exceptionally lightweight. It ensures that your ride remains free from any additional weight, all while delivering outstanding performance. Plus, it allows you to stash multiple spare tubes in your cycling bag effortlessly. Concerned about TPU inner tube quality? Don't worry!.We offer a 12-month refund plan, 1 defective = 30% of Money back, 2 (60%), 3 (90%), 4 (100%) for 4-Pack Kit; 1 defective = 60% of Money back, 2 (100%) for 2-Pack Kit; Recommendations for use: Check tyre pressure before cycling. Installation Tips: Inflate slightly before installation to check for air leakage. During installation, inflate to 0.35 bar(5 PSI) first, ensuring the inner tube is close to the tire's inner wall. Adjust the inner tube by pressing. Avoid heavy inflation without a casing to prevent irreversible damage; exceeding 0.35 bar(5 PSI) will cause irreparable expansion. Packing List: 4-pack inner tubes (including 2 patches per pack)