Viva Junior Inline Skates 68mm (Size : 12-1) :- wheels are an integral part of each skate and that why we created a whole collection of wheels to each skater. Material,Profile,Hup,Size and Duro meter of the wheel are all variables which decide its performance and response. We have created the perfect balance of each of this varieties to ensure you have the appropriate speed, shock absorbility and wearing for your performance level.