Like most running shoes, you can expect to get 300-500 miles or 480-800km out of a pair of running shoes before they need replacing. Apart from the general wear and tear, usually visible on the upper and outsole, you’ll notice that your shoes will start to feel ‘tired’, lacking that bounce and even cushion they initially had. It’s usually a good idea to replace them at this point to prevent injuries or at the very least add a new pair into your rotation and start phasing the old ones out.