I've found that about 300-350 miles for actual running works for me (but then I am a bit of a heavier build) - by then the soles and insole are fairly worn. I d

I've found that about 300-350 miles for actual running works for me (but then I am a bit of a heavier build) - by then the soles and insole are fairly worn. I do not doubt that I probably get a good 100+ miles extra wear where I am not actually running. 300 feels low, but when you get into a new pair of basically the same trainer after running around in a 300-350 mile old pair, the new ones feels amazing in comparison so I feel like there is some accuracy in that.