I'm not disappointed, except that these are not the wheels for hockey but to fitness.
Indeed, the curvature of the wheels, seen in facial cut, is not round, as must be the case for hockey skates (to better cornering). This curvature is elliptical (it's more dicey) but it loses less speed because there is less material in contact with the ground (always during turns, I hear).
So: Watch this why you should use them!
