Why Do Your Shoes Wear Out Unevenly?
There's no clear expiry date when it comes to a pair of shoes. They'll be replaced when it becomes necessary, which of course depends on the quality (and materials) of the shoes, how often you wear them, and what you wear them for (exercise, daily wear, or occasional wear). For many people, shoes wear out evenly—with the left and right shoes fairly evenly matched with their progress of wear and tear.