Thicker and more wear-resistant, thicker than ordinary tires, very wear-resistant, it is of high temperature resistance, good aging resistanceApplicable to Xiaomi M365 It adopts high-quality American valve, whatever inflation and installation is very convenient. The size of valve and inner tire are perfectly matched for 8 1/2 x2 Xiaomi M365 electric scooterVery durable The inner tire surface is coated with talcum powder, which prevents the tire from overheating and the inner and outer tires stick together, this prolongs the life of the inner tubeGood seismic performance The inner tires are of good air tightness and stability, and have better damping than solid tires, giving you a more relaxed and comfortable riding experienceCustomer Service Before installing, check that the inner tubes are completely sealed by placing them in water.more wear-resistant.Advantages of butyl rubber inner tube:butyl rubber inner tube has good air tightness, heat resistance, elasticity and aging resistance. It is not easily deformed and has a longer service life.colour:blackMaterial:rubbersize:Inner diameter: 15.6cmOuter diameter: 22.0cmPackage Contents:2 x Inner Tube2 x CrowbarInstallation Precautions:1. Before installation, please check if the inner tire leaks, just put it into the water to see if it is bubbling.2. Do not use a sharp object to install it, to avoid damage to the inner tire.3. If the inner tire is not round or it has a bulge. It is no problem, and it can be used normally after loading the outter tire.4. The surface of the inner tire has talcum powder, which can prolong the service life, prevent the tire from overheating and the inner and outer tires stick together. Therefore, it is normal for the dirty surface. You don't need to worry about it.Only the above package content, other products are not included.Note: Light shooting 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.