Karts are the vehicles that give the Mario Kart series the second half of its name. They are what the Characters traverse throughout the track with.

Characters from Super Mario Kart to Mario Kart: Super Circuit had default Karts to use, although, they differed in terms of the racer being either Light, Medium, or Heavy. Since Mario Kart: Double Dash!!, Characters could choose their Karts, which now, in the newer Mario Kart games, have statistics.