Aggressive skate wheels for aggressive skating typically have smaller wheels with a diameter of 54-64mm making it easier to make stunts. The wheels are very hard and typically range from 88A-95A. With hard wheels you get most out of your stunts and, moreover, you avoid that the wheels stick to the surface as would be the case if they were soft wheels that have more grip. Furthermore, aggressive inline wheels have a very flat profile which ensures optimal control in every situation.
All aggressive skate wheels are sold without bearings (unless otherwise stated).