The Atom Matrix are a sequel to the excellent ATOM ONE racing wheels. The composition of the urethane ensures excellent grip and durability of the wheels, and now the driving characteristics are improved by a new HUB which, in terms of greater flexibility, provides higher support in the bounce and thus makes the wheels even faster. With its research, ATOM is systematically moving further and further, catching possible shortcomings. ATOM ONE were among the world's best and now they have a successor. PS: fitness skaters "a group that mainly uses this size of wheels" will not be able to praise the wheels. In fitness skates of all brands, manufacturers assemble the cheapest and therefore the lowest quality wheels. And good wheels are the basis when it comes to driving pleasure, speed because they have completely different properties in terms of grip, wear ... and finally you will find that the Atom is a bit more expensive, but it will last you twice as much. TRY it!!!!