From WiKirby, your independent source of Kirby knowledge.
A drag tire is an item which appears in the Top Ride mode of Kirby Air Ride. It appears randomly during standard races, dropping onto the course. When touched by a racer, a large grey tire will be placed behind the racer's vehicle, dragging it down and emitting black smoke. While in effect, the racer becomes considerably slower.
The drag tire cannot be shaken off using a Quick Spin. It can, however, be removed by a stage hazard, or by passing it onto a rival. It will also disappear on its own after about 8 seconds.
Drag tire can also be found in City Trial, though here, it does not manifest behind the vehicle when picked up, and cannot be passed to other racers.
Yellow Kirby being dragged down by a drag tire.