Without a slip angle, there is no lateral force on the tyre. Without a slip ratio, there’s no longitudinal force either. In this video, Claude Rouelle, president of OptimumG, breaks down slip angle, which he regards as one of the most fundamental, and most misunderstood, concepts in vehicle dynamics:. He explains what slip angle actually is, why it creates the self-aligning moment (Mz) through pneumatic trail, and the three components that generate slip angle


