Transform your skating experience with these innovative light-up skateboard wheels featuring an exciting flint effect. Available in sizes from 90mm to 125mm diameter with 24mm thickness, these 90A hardness wheels deliver both style and performance. The wheels incorporate a self-powered LED system that illuminates through centrifugal force - no batteries needed! Each set includes 6 complete wheels displaying vibrant red, green, blue, purple, and white lights. The unique flint particle system creates dramatic sparks during slides, with options for 52 or 104 flints - more flints mean more spectacular effects. These wheels are engineered with high-precision bearings for smooth rolling and superior control. Perfect for night skating, they enhance visibility whilst maintaining excellent performance characteristics. Note that these handcrafted flint wheels have high hardness and may produce noticeable vibration during use. Some flint particle loss during sliding is normal due to the handcrafted nature of the product. Whether cruising city streets or practising tricks, these wheels will help you stand out with their stunning light and spark effects while delivering reliable skateboarding performance.