From the Super Mario Wiki
Retrieved from "https://www.mariowiki.com/index.php?title=Square_Tire&oldid=2321037"
The Square Tires are an item appearing in Mario Kart Arcade GP, Mario Kart Arcade GP 2, and Mario Kart Arcade GP DX. As the name implies, it makes an opponent's tires square making the wheel harder to control, in a similar effect as the Boo. After about 20 seconds, the tires will go back to normal.