Fitness inline skate from Fila skates. The Houdini 90 has a aluminium frame that allows you to change setup from 3 x 90mm wheels to 4 x 84 wheels. A nice setup if you are looking for both speed and agility.
These roller skates for fitness has 3x90mm wheels with wheel hardness of 83A. The bearings are abec 7 and provides you with at fast and smooth ride.