Solid wheel made of extra soft material. These are the lightest solid wheels with the highest vibration absorption. It is by far the most durable and most acceptable solid wheel on the market. RECOMMENDATIONS: - Do not install on skates that exceed 40 km/h. - Before installation, consider: 1- Designed for maximum speeds of 40 km/h, beyond which it can separate from the rim. 2- Significantly increases the noise generated during movement. 3- No heating is required for installation. 4- Not recommended for use on scooters without limits. Installing the solid wheel: Coat the rim with grease or, alternatively, Vaseline. In very cold areas, it is recommended to heat the tire to facilitate installation.