.90/2.125 Inner Tubes with Schrader Valve (American) Suitable for 26 Inch Children’s Bicycle Tyres.
The inner tubes are puncture-proof, made of butyl, a type of synthetic rubber very elastic and at the same time airtight. Depending on the compounds used, you can have different product qualities: the inner tubes have extreme characteristics in terms of air tightness and elasticity and can be used for a wide range of tyre sizes.