A tight racecar doesn't seem to be able to be steered sharply enough through corners. Instead, the front end continues out toward the wall. A term that describes the shape of a tire. Under inflated tires tend to sag, while over inflated tires have a very upright profile. A small indentation in a tire used to indicate how much a tire is worn in a specific spot.
Indicators are place in rows across the tread of the tire.
This allows teams to determine if a tire is overinflated or underinflated. Overinflated tires will show more wear in the middle of the tread while underinflated tires will show more wear on the outsides of the tread. The track has five turns instead of the normal four found on a normal oval track. The fifth turn is in the middle of the front stretch. The term tri-oval may also refer to the section of the track which leads into and out of this fifth turn.