Features: Premium scooter wheels combine a high strength aluminum alloy rim with high rebounds PU tires and advanced bearings, delivering great durability, smooth rolling performances. Aluminum rims ensures precise dynamic balances and light weight maneuverability, while antilock bearings prevent wheel seizures and PU tires provide great shock absorption. Designed for professional skateboarders and city commuters seeking upgrades, these wheels meet rigorous performances demands for both technical trick and daily transportation. These aluminum/PU wheels feature waterproof sealed bearings and optimized weight distribution, ensuring extended service life without compromising agility or speed. Perfect for navigating city streets, skate park, or rough pavements, these wheels maintain stability during high speed slides, and impacts heavy landings. Specifications: Materials: PU+Aluminum Alloy Color Optional: 6 Color are Available as Shown in the Picture. Package Weight: approx.450g Diameter: approx.100mm/3.93in Package Includes: 2Pcs Skateboard Wheels note: Please allow 1-3mm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!