To start with, the most important thing about the axles is that the bushings fit the rider's weight, especially for children. But paying extra for quality axles is worth it, especially with a view to the future. This belongs to suspension trucks - sprung axles, and Avenuetrucks is the market leader! More pop (higher ollies) and less impact - this means that the bones and joints as well as the decks are protected and everything lasts longer.