[Ultra-light] The bicycle inner tube weighs only 38 grams, which is about 100 grams lighter than the traditional butyl rubber inner tube. A pair can save 200 grams, reducing the burden on the bicycle and making riding easier.[Compatible with multiple tire sizes] This 700C road bike inner tube is compatible with a variety of tire sizes: 700X18/23/25/28c[Wear- and ] The bicycle inner tube is made of special TPU material, which is also much more than traditional rubber inner tubes. In addition, TUP material is oil- and waterproof, and has excellent load-bearing capacity and impact resistance.[Reduce rolling resistance] Since the TPU bicycle inner tube weighs only 38 grams, it is lighter and more delicate than 300- rubber inner tube, and the friction on the tire is smaller, which can maximize speed and performance.Specifications: 700C road valve 60mm 38gColor: As ShownMaterial: TPUPackage Contents:1 * tireOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.