Keep up the maintenance of your bicycles with this premium quality bike tube, which offers a universal fit. Suitable for Schrader valve only Made of premium quality butyl Fits tyres 20in. (50cm) x 1.25in. (3.2cm) x 2.25in. (5.7cm) x 2.1in. (5.3cm) Universal fit Adult installation required. Follow installation instructions carefully. Colour: Black Warning: Use hand pump only. Do not over inflate.