What can cause steering axis inclination (SAI) to be out of specification?

Steering axis inclination (SAI) refers to the angle formed between the steering axis and vertical when viewed from the front of the vehicle. This angle is crucial for proper steering response and vehicle stability. A bent strut can significantly impact SAI.

When a strut is bent, it alters the geometry of the suspension and can misalign the steering axis, pushing it out of its specified angle. This misalignment directly affects how the wheel contacts the road and can lead to uneven tire wear, handling issues, and instability, which are all critical to address for safe vehicle operation.

While a bent steering arm can also affect alignment, the option specifically relates to SAI being out of specification due to changes in the strut's position affecting the overall alignment geometry more directly. Similarly, incorrect camber and caster settings do not alter SAI on their own as they influence different angles in the suspension system rather than the inclination directly.