8pcs Ultralight Bicycle Inner Tube 700 X 23 25 28 30 32 Road Bike TPU Tube 45 65 85mm Length French Valve 700C 28 Tube

DescriptionBefore inflating, please use tools to tighten the valve core screws firmly to avoid the valve core loosening over time.The air core and air rod are both made of metal, and there is no glue between them. Vibration and scratching caused by riding can lead to loosening. Tightening as much as possible can reduce the occurrence of such problems.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.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.Safe and not easy to burst: The special new TPU material has excellent resistance to puncture.Seamless construction, with a mold-cured vulcanization, to ensure uniform roundness and give a smooth ride and handling.Good airtightness : The bike inner tube is equipped with a high airtightness 42mm/45mm/65mm/85mm French /Schrader nozzle, which will not leak and can be used for half a year with one inflation.This inner tube cannot be inflated a lot when it is not installed in the outer tire, otherwise it will cause irreversible damage!Please use a manual air pump instead of high-speed air filling equipment such as air compressors or pumps.Before inflating the tube, turn the valve inward (towards the center of the tire circle). Inflate a small amount until the inner tube is round; this pressure should be less than 0.5 bar/8 PSI.If the vacant inflation exceeds 6PSI, the inner tube will expand beyond repair!Please install according to the product manual in detail