- crisp
- smoothing
- tread gone
- worn through
Right shoe, sole up, toe at the top
Inner edge wear
Wear on the inside of the heel and forefoot points to the foot rolling inward.
What it means
When the inside of the heel and the inside of the forefoot wear faster than the outer heel, the foot is rolling inward beyond the normal arc. Shoe stores call it overpronation. The classic picture is a scuffed inner heel edge, a bald patch under the ball of the foot behind the big toe, and a shoe that leans inward when you set it on a table and look at it from behind.
Outsole wear is a rough proxy here, not a diagnosis. Research that measures the foot directly finds a loose link between how much a foot pronates and how the shoe wears, and a lot of healthy runners pronate plenty. The pattern only becomes an action item when it comes with shin, inner-knee, or arch pain.
The table tilt test is the quickest second opinion: put both shoes on a flat surface, crouch to eye level behind them, and check whether the heel counters tip inward.
What to do about it
- No pain? Keep running in neutral shoes and check again in 100 miles. Nothing needs fixing yet.
- Shin, inner knee or arch pain plus this pattern? Try a stability shoe with guide rails or a firmer inner midsole for the next pair, and add calf raises and single-leg balance work.
- Do not buy a stability shoe because of the wear alone. Support you do not need can push the foot outward and create a new problem.
Stability / support
Firmer inner midsole or guide rails that slow the inward roll. Only worth it when the wear and a symptom agree.
Read my own shoesQuestions
Do I need orthotics?
Usually not. Start with a stability shoe and strength work. Custom orthotics make sense when a physio finds a specific structural reason.
Will a stability shoe slow me down?
Modern stability shoes weigh within an ounce of their neutral siblings and use the same foams. The old bricks are gone.