Definitions for "Flat spot"
Keywords:  tyre, undrivable, brakes, ruins, tire
If a driver locks a tire (brakes so hard that the wheel stops turning), he'll grind a flat spot on the surface of the tire. This causes vibration that can make the car almost undrivable.
What happens when a tyre is worn through on one spot after a moment of extreme braking or in the course of a spin. This ruins its handling, often causing severe vibration, and forces a driver to pit for a replacement set of tyres.
school of tuna swimming close to the surface, so that they will create a flat spot, more noticable on choppy days.
A point during acceleration when the engine seems to lose power for an instant.