Static Castor and Castor Trail – Suspension KPI

Castor angle is the inclination of the suspension steer axis when measured in side-view. It is measured in Degrees and is positive when the top of the steering axis leans towards the rear of the vehicle.

Castor trail (or mechanical trail) is the distance between the tyre contact patch centre and the steer axis intersection with the ground when measured in side-view. Castor trail is measured in mm. Castor angle and castor trail can be seen in the picture below.

This KPI page is only a brief overview. To learn more about this and other KPIs, including KPI values used in industry, real-world examples and best-practice guidance, please refer to our courses below.

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