Monochrome and color flash wheels: all the wheels light up when the inline skates are working, the flash volume is larger and more attractive. High elasticity: 82A hardness, 80% strength , with polyurethane polymer material, non-slip and wear-resistant, good compression resistance and high safety. It uses high-quality materials, the wheels are comfortable and durable, the light is bright and not sifted. Suitable for many occasions, indoors, outdoors, on asphalt roads, parks, etc. High-speed rotary bearing: Adopts 608RS bearings, not easy to get stuck, smoother and faster. Low sliding noise: wider contact surface with the ground, crushing various road surfaces, the greater the ability to obstacle is strong, four-wheel polyurethane shock-absorbing sliding is more comfortable, and the grip is more stable. It is safer when rotating at high speeds.