Purpose
Calculate the steering-axis angle viewed from the front of the vehicle.
How It Works
SAI is calculated during the caster sweep from the relationship between steering movement and wheel-angle change.
When to Use
Use as a diagnostic value when checking bent or displaced steering and suspension components.
Benefits
- Adds diagnostic information beyond adjustable angles
- Supports left-to-right comparison
- Works with included angle analysis
Last updated: July 2026