Match center, edge, cupping, feathering, flat-spot, or diagonal wear to likely cause, severity, and next steps. No photo upload — free, private, in-browser.
Select the wear pattern you see
Center wear
Pattern
Medium
Severity
Likely cause
Typically overinflation — the center of the tread carries most of the load.
Recommended action
Set cold pressure to the vehicle placard (not the sidewall max) and recheck after a few days.
Safety note
A hard center reduces wet grip on the shoulders. Correct pressure before long trips.
Correct inflation, alignment, or balance soon to stop accelerated wear.
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Pick the pattern that matches what you see: wear in the center, both outer edges, one edge only, cupping (scallops), feathering (sawtooth across the tread), a flat spot, or diagonal wear. Each pattern maps to a typical severity plus likely cause, recommended action, and a safety note — not a photo-AI diagnosis.
Center wear often tracks overinflation; both edges, underinflation or overload; one edge, alignment. Cupping and feathering point at suspension or toe. The copy tells you what to inspect (pressure, alignment, dampers) so you do not only buy new tires and repeat the wear in 8,000 miles.
One-edge, cupping, and diagonal wear are treated as high severity; center, both-edges, feathering, and flat-spot as medium. That ranking is a safety prompt to inspect sooner, not a lab measurement of remaining rubber. Pair with Tread Depth Gauge if you have a 32nds reading.
You select a pattern from a list. No camera, no account, no VIN. Close the tab and the choice is gone. This cannot see inner-shoulder wear you have not selected; look at both sides of the tire before you trust the hint.
Look at inner and outer shoulders, the center ribs, and whether scallops or a flat patch repeat. Rotate the wheel so you are not judging one lucky spot.
Center, both edges, one edge, cupping, feathering, flat-spot, or diagonal. If two apply, start with the more dangerous (one-edge or cupping).
Fix inflation or alignment before replacing tires when the pattern says the car is eating them. High-severity patterns deserve a shop inspection.
Open Tread Depth Gauge with a 32nds or millimetre reading. Pattern analysis does not replace a depth number or a puncture check.
Straight answers on privacy, limits, and how the workspace behaves.
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