In addition to skate boards, skateboards and bearings are part of a skateboard, the choice of which to take care of are skate wheels. They are selected according to their two main parameters. And this is according to the size, which is reported in millimeters in diameter, and according to the hardness it is given in a parameter that looks, for example, 99A. In general, skate wheels with smaller diameters are slower and more stable at jerseys, making it suitable for technical riding and skate park riding. Skate wheels with a higher diameter are then suitable for beginners or riders in ramps or pools. The largest wheels are designed for longboards because they are designed for higher speeds and a coarser finish. As for the hardness, soft castors (0A-98A) are designed for coarser surfaces where you need good adhesion, hard castors (99A-more) are fast and have low adhesion, so they are not effective on slippery and coarse surfaces. The hard wheels are used by professional drivers. Choose from the best brands at Swis-shop.com.