2-Pack Schrader Valves MTB TPU Inner Tube 29inch TPU Inner Tubes for 2.1-2.5 MTB Bike Tube with 48mm Schrader Valves Lightweight Mountain Bike Spare Tire

【Schrader Valve】48mm Schrader Valve TPU Inner Tube , MTB Mountain bike tube is compatible with many tire sizes: 29” x 2.1-2.5 【TPU Material】: TPU inner tubes are lighter and stronger than butyl rubber and have higher air tightness than latex. With a weight reduction of 70% compared to ordinary butyl rubber inner tube, the use of this TPU ultra-light inner tube can significantly reduce the rotational mass of the vehicle riding, making the ride more flexible. 【Portable】The size of the bicycle inner tube is only 4.13in x 2.55in x 1.95in, which is about 2/3 volume less than the traditional butyl rubber inner tube, reduce the burden on the bicycle, and make the ride lighter. 【Environmental protection】: TPU (thermoplastic polyurethane elastomer material) inner tube is made of green and environmentally friendly thermoplastic polyurethane material, which can achieve 100% recyclable. 【Buy with confidence】: After you receive our TPU inner tube, no matter what problems you encounter, you can contact us at the first time, and we will provide technical guidance and after-sales guarantee.