Many of us get prompted to replace our shoes when we see wear on the sole of the shoe. Shoes today are often designed to show this wear on the sole with a change of color, which can help persuade you it is time to replace the shoes.
This wear pattern is normal, as walkers should be pushing off with the big toe. This is called a neutral gait, without excessive rotation during the stride.
An over-pronator would see the worn off spot even more toward the outside of the sole on the big toe side of the shoe. Over-pronators should use motion control shoes to help correct the over-rotation of their stride.
A supinator or under-pronator wouldn't see wear under the big toe, but would see the wear along the little toe side of the shoe.
