Custom made by ewheel reinforced 100% butyl rubber. They improve the protection against wear and tear of the inner tube, which is the main cause of punctures and scooter breakages. Size: 10x2.125 inches. With a 90º curved valve. Designed for optimal and long-lasting performance, reducing scooter maintenance. The recommended maximum pressure for the inner tube is 4 kg and it is recommended to use the pressure established by the tire: between 2.8-3.5 kg.