Without the right wheels, sliding and freeriding is no fun. In the UrbanBoarding Longboard Shop you will find everything that is important to you.
Of course, here are some formulas:
The hardness should be well chosen to avoid abrasion, to be able to deliver good slides and not to damage the reel too quickly (flatspots - flattened areas as a result of abrasion; eggings - egg-shaped abrasion with wheels that are too soft, chunks - "torn" pieces of polyurethane). We recommend a hardness between 85a and 90a.