Why do basketball players wipe the soles of their shoes?
The Real Answer
Basketball players wipe the soles of their shoes mainly to remove dust and other surface contamination that can reduce how much grip they feel against the court. Basketball traction depends on the interaction between the shoe’s outsole and the playing surface, and even a small layer of dust can change that contact.
Wiping the sole with a hand can temporarily clear some of that material and make the shoe feel more secure during cutting, stopping, and changing direction. The effect is not identical for every shoe, court, or condition, and wiping does not guarantee better traction every time. But on a dusty court, it is a quick way for a player to try to restore the grip they expect from the outsole.
Basketball players will wipe the bottom of a shoe with their bare hand, put that same hand on the ball, and keep playing without a second thought. Drop a french fry on the kitchen floor, though, and suddenly everybody becomes an infectious-disease specialist.
Why People Ask This
People ask because players can be seen repeatedly reaching down and wiping their shoes during games, sometimes only seconds after doing it before. The habit is especially noticeable because it happens in the middle of play and looks strangely deliberate if you do not know they are trying to improve the shoe-to-court contact.