VISUAL INSPECTION GUIDE

Visual Tire Wear Troubleshooter

Seeing uneven tire wear? Compare the patterns, answer a few questions and prepare practical next steps for a tire professional. You don’t need to know alignment terminology.

Visible damage, rapid pressure loss or severe vibration? Do not continue driving on a suspect tire. Stop safely and seek professional assistance. This guide cannot determine whether a tire is safe to drive.

  1. 1 · Identify
  2. 2 · Quick checks
  3. 3 · Guidance

1. What does the wear look like?

Choose the closest pattern, or “I’m not sure.” These simplified diagrams are comparisons, not a diagnosis.

Gold areas show worn patches. Feathering uses a side profile to show the shape of block edges.

Wear pattern

Recognizing common wear patterns

Compare where the rubber is worn, not just how deep a single groove appears. Center wear runs down the middle; both-shoulder wear affects both edges. One-sided wear favors the inner or outer edge. Cupping creates repeated low patches around the circumference; feathering describes differently shaped edges of individual blocks or ribs. A flat spot affects a localized area rather than the whole center strip.

Patterns can overlap. Use “I’m not sure” when the comparison is unclear and ask for a whole-tire inspection. Visual identification cannot reveal hidden damage.

How it works and limitations

This guide prioritizes reported safety warning signs, then combines your selected pattern with relevant symptoms to suggest inspection questions. Cold inflation should follow the vehicle placard and owner’s manual, not the maximum pressure molded onto a tire. Rotation requirements vary; rotation and alignment adjustments do not restore rubber that has already worn away.

Pressure history, loading, alignment, tire construction and suspension condition can interact. Even matching inner, center and outer depths cannot establish the cause or clear a tire for use. Ask a professional about replacement and the underlying cause before following routine maintenance advice.

If you are separately comparing replacement dimensions, the tire size comparison calculator shows geometry differences. It cannot confirm vehicle fitment, tire condition or safety.

Technical methodology and authoritative sources

Depth conversion: 1 inch = 25.4 mm; 1/32 inch = 0.79375 mm. Classification uses unrounded millimeters. Any entered value ≤1.6 mm triggers the conservative stop-driving category. This is approximately NHTSA’s 2/32-inch replacement guidance, rounded upward for screening; it does not define applicable law. A reported wear-indicator or local-limit concern also overrides all other results.

Any of seven reported danger conditions triggers stop-driving guidance. The grouped structural answer conservatively flags cords, bulges, separation and severe damage together; it does not confirm four separate defects. None noticed explicitly reports six damage/driving hazards absent, while tread-limit status stays unknown. Unselected groups remain unknown. Severe control symptoms reported later also trigger the same engine override. Unknown safety status, an identified abnormal pattern or reported vibration, pulling or noise triggers prompt inspection. Routine follow-up is available only when no pattern is identified, all danger questions are No and no symptoms are reported; it never certifies roadworthiness.

Sources checked October 24, 2026. Intended for passenger-vehicle owner observations, not commercial inspection, legal compliance or mechanical diagnosis.