The Powerslide Jet Pro Black Inline Skates are fast, durable and size-adjustable skates - perfect for active kids. The Jet Pro Black makes it easy to adjust the wheel setting to suit your child's riding style, giving them the option to switch between a super-fast and agile 3-wheel setup or a more stable, lower-grounded traditional 4-wheel setup. These functional skates also have size adjustments. Kids grow fast, and the Powerslide Jet Pro Black can be adjusted to grow with them. The skates are equipped with high-quality components, including Hurricane wheels and Wicked ABEC 7 bearings, so young skaters can skate smoothly and quickly with a smile on their face.Powerslide Jet Pro Black Inline Skates Features:Outer boot: Hardboot; 129/145/165mm 2-point mountingInner boot: Jet inner boot with EVA padding and expandable toe sectionFastening: Triple stabilization: Top buckle, 45° Velcro and classic lacingRail: Powerslilde Volt 2in1; ADC10 aluminum; 27-30 = 8.1" (207 mm) / 31-34 = 8.6" (219 mm) / 35-38 = 9.1" (231 mm); 3x76 mm (optional 4x68 mm) / 3x80 mm (optional 4x72 mm) / 3x84 mm (optional 4x76 mm) 2-point mountWheels: Powerslide Hurricane; 76/80/84mm / 83A; HR = high rebound, ride comfortBearings: Wicked; ABEC 7; chrome steel balls; carbon steel