The Phuzion Krypton 100 inline skates are a popular choice to keep moving in a fun way. This model of Powerslide inline skates is equipped with a solid, one-piece boot. The Powerslide inline skates run small. We therefore recommend choosing a size larger than your normal shoe size. These skates are a good choice if you have narrower feet. * A High-Cut cuff gives you maximum ankle support for stabilization and reduces muscle fatigue * Powerstrap closure to prevent sliding of the heel with the extra strap over the instep for a tight fit and more control * 100mm wheels with a hardness of 83A are just right to complete this setup * Trinity mounting system for optimal balance and control as it brings the wheels as close to the boat as possible * Adjustable brake that can be adjusted in height to suit your personal preference Remember to check and, if necessary, tighten all nuts and bolts before use. Check this regularly before use. Model Wheelbase 39, 40, 41: 231mm 42 to 47: 250mm Wheel diameter: 100mm Frame material: Aluminum Shoe/shell type: One-piece, Semi-soft Level: Intermediate Inner shoe details: Built-in, Anatomically shaped, Malleable Closure system: Lace, Powerstrap, Buckle Bearing precision: ABEC-7 Wheel hardness: 83A Frame type: Flat setup, 3-wheeled Axle head: 1 axle system, à˜8mm, Hexagon Max . wheel diameter: 100mm Shoe material: PU leather, Plastic, Fiberglass Inner shoe material: Breathable material, Memory foam Cuff: Stable, High ankle support, Integrated carrying loop Fitment: Trinity br />Brake: Yes, Adjustable Weight: 1385g Recommended for: Fitness skating, Training skating