Attention: Please read the tips below before purchasing. 1) Do not attempt to install the tyre alone. It is recommended that the installation is carried out by more than two people or a professional bicycle repair shop, which can ensure the successful tyre installation. We provide you with the assembly instructions below and a video link (https://youtu.be/OYAYYRWE43Y) on the product page. Please read carefully before installation. 2) If you believe that the product is not suitable or problems during installation after receiving the package, please contact us by email or message. We offer you the best advice and a satisfactory customer experience. How to change the fixed tyre on your M365 scooter. You need to prepare tools: √ Full rim √ Allen key √ Razor blade √ Slotted screwdriver √ 18 mm key √ Lubricant √ Rim change 1. The tyre must be soft: before installation, please soak the rim in warm water of 50 to 80 °C for 5 to 10 minutes, so that it is softer and easier to install. Alternatively, you can put it in a microwave for three minutes by checking it every minute. Note: use gloves to avoid hurting your hands. 2. Cover the inside of the rim with soapy water or a special rim lubricant (do not use lubricant, otherwise the rim will be damaged). 3. Place one side of the hub on the tyre and go to this side (it is recommended to place another tyre under this tyre). 4. Use the professional tyre levers to attach the hub to the tyre. Specification: Material: rubber Size: 21 x 21 x 5 cm. Compatible model: for Mijia M365 electric scooter