Item Type: TireMaterial: Rubber + Aluminum AlloyOuter Diameter: Approx. 19.5cm/7.7inThickness: Approx. 4.8cm/1.9inBearing Inner Diameter: Approx. 10mm/0.4inWeight: Approx. 750g/26.5oz .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; } 1The non slip pattern enables it to be used in both snowy and rainy days. It is safe to play scooters and enjoy a comfortable and pleasant riding experience. 2The special hollow design enables the scooter to have excellent anti shock performance and damping pressure. 3The texture of the tire surface helps the scooter have a good grip and good grip ability, precise stability and handling. 4Easy to use and replace, adjusted flexibly and fixed tightly, it is wear resistant, anti corrosion and durable. 5The tire is flexible and has a damping capacity, can be stretched and will always recover to its original shape.