Toe-out makes your race car dart on straightaways because the front wheels point outward and fight each other for dominance. Any small bump, road rut, or steering input causes one tire to instantly bite and steer the car hard in that direction, making the car feel nervous and unstable at high speeds.
Causes and Mechanics
- Tire Scrub: Outward-pointing tires scrub against the track surface, creating constant lateral friction instead of rolling straight.
- Over-Responsiveness: The steering geometry has zero deadband; the smallest twitch of the steering wheel alters the contact patch immediately.
- Bump Steer Amplification: Suspension travel on the straightaway pushes the tie rods up or down, changing the toe angle mid-bounce and jerking the steering.
- Lack of Self-Centering: Positive toe-out reduces the natural self-centering forces that keep a car tracking straight under high speed.