The Powerslide Next Core Black 80 inline skates are packed with innovative features designed to enhance your skating performance. The durable NEXT boot is complemented by a height-adjustable cuff that lets you customize support and flexibility to your individual needs and skating style. The Kizer Clipper buckle has eight snaps to ensure the buckle won’t open while skating… or in a crash. To help keep your foot in place, the NEXT Core Black 80 features a traditional lacing system along with a 45-degree hook-and-loop strap that makes it easy to get the skates on and off.The Elite die-cast frame is lightweight and durable, so you can feel confident pushing your limits in the urban jungle. Designed with the renowned TRINITY 3-point fit system, the NEXT Core Black 80 provides excellent speed, agility, and stability. With three points of contact with the boot, the TRINITY system creates a channel that brings the wheels as close to the foot as possible, giving skaters incredibly efficient power transfer while improving balance and overall control.NEXT Core Black 80 is ready to go right out of the box. Equipped with Powerslide Spinner 80mm/88A wheels that are grippy, fast and durable, combined with super smooth WICKED ABEC 9 bearings, you'll have a blast cruising around town. Features of Powerslide Next Core Black 80 SkatesShell/Outsole Sizes: EU 36/37, 38/39, 40/41, 42/43, 44/45, 46/47Shell/Outsole Material: Glass Fibre Reinforced Plastic (GFRP)45° Closure / Forefoot Closure: Velcro Strap / Standard Lacing SystemLining: Basic Dual-Foot Sole fitTop Liner Closure: Lace-UpInner Sole: MYFIT EVA SoleFrame Name: Powerslide EliteFrame Mount Standard: TRINITY 3-Point MountFrame Material: ADC10 AluminumFrame Manufacturing Process: 3D CastFrame Wheelbase (inches / mm): 36-43 = 9.6" (243 mm) / 44-47 = 10.8" (275 mm)Max. Wheel Size: 36-43 = 80mm / 44-47 = 90mmFrame Axles: Single 8mm Steel Axle, 4mm HexagonalSide-to-Side Adjustment: Yes, TRINITY Coating, 4mmFront-to-Back Adjustment: Yes, TRINITY Coating, 8mmWheel Name: Powerslide SpinnerWheel Diameter: 80mmWheel Hardness: 88AWheel Compound: SHR= Super High ReboundWheel Configuration: 4x80mmBearing Brand: WCD WickedBearing Class: ABEC 9Bearing Material: Steel chromeBearing cover: RZ, single-sided steel cover covered with rubberBearing lubrication: Kyodo grease Additional materials:   Manufacturer's website YouTube channel