Like any contraption with wheels, skateboards have bearings too. Although considered a professional sport, manufacturing skateboards and their parts are still largely influenced by street culture. The bearings are the metal inside the wheels that bear all the weight of the person and the skateboard combined but also provide for maximum movability. Good bearings are crucial for a good board.
There are no specific standard rating guidelines for skateboard bearings. By disparate comparison, expert skateboarders estimate the precision of the bearings and know that the good ones fall under 3 or 5, using the ABEC system of rating bearings used in machines. These bearings can give you a smooth ride but at the same time, they are strong enough to bear the brunt when you jump on your board. But not all manufacturers consider the ABEC when producing skateboard bearings. You wouldn