[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 80mm 38g Color: As Shown Material: TPU Package Contents: 1 * tire Only 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.