Some Tips for New Buyers Please watch a few related videos on installation before trying by yourself.Maybe you need to prepare some more tools such as Vaseline or Soapy Water and Heat Resistant Gloves. One is to slather across the rim and inside the wheel for lubrication. Another is for holding the tire after heating. If you do not know how to change the tire and feel it hard to handle. You can take the scooter and tire to repair store for help. Maybe the workers understand how to operate, because they have more specialized tools. It's not an easy task, it requires a bit of strength and a good method. If you do not have the right technique, or the right tools. We do not suggest you make a purchase. * Please measure and check these parameters before purchasing, otherwise incompatibilities may occur. Tire Specification:Breaking strength (mps): above 15, hardness: 68+-5, wear (M3/1.61KM): below 0.4, adhesive content: 45 high-strength wear-resistant adhesive, load weight: 85KG, aerated width: 78mm+-3mm, aerated outer diameter: 258mm+-3mm