Schrader ValveThe size of Spingo TPU Inner Tube Schrader Valve is 48mm MTB Mountain bike tube is patible with many tire sizes 29 x 1.502.10TPU Material TPU inner tubes are lhter and stronger than butyl rubber and have hher air thtness than latex. With a weht reduction of 70 pared to ordinary butyl rubber inner tube the use of this TPU ultralht inner tube can snificantly reduce the rotational mass of the vehicle riding making the ride more flexible.PortableThe 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 lhter.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 aftersales guarantee.