Typically for me, I need to replace my sneakers anywhere between 250 – 350 miles.  I try to keep a date in my sports software like Endomondo or Gamin.  But sometimes my sneakers tell me it is time to replace them.  When they are getting old, I sometimes feel it in my knees, shins or calves.  Lately I was having calf cramps and then realized I think it was time to replace my sneakers Taking a look at the bottom […]