Educational case studyIntermediateEvidence-led
Recording tread depth at inner, center, and outer positions on every tire reveals wear patterns that one minimum number hides.
Why this matters
The value of this case is the order of evidence and the verification step. The same symptom on another vehicle may have a different cause.
Evidence to capture first
- Cold pressure and placard specification
- Three-position tread depth
- Damage, age marking, and rotation position
- Alignment or suspension clues
A disciplined path
- Measure cold
- Map each location
- Correct pressure
- Recommend rotation, alignment, or replacement based on the complete pattern
Decision point
Tire replacement and pressure decisions should follow placard, condition, age, and measured tread—not appearance alone.
Source desk
Use current model-specific service information for specifications, connector locations, disabling procedures, and tightening values. The following public resources support the broader safety or system context used in this guide.

