rule of them, toss trainers when you put them on a flat surface and they ar bowed or can rock. OR 500miles. I rotate two pairs at once, gives the mid sole time to relax. anyway, expensive if you run alot, although no-where near as bas as cycling.
@dogsballs started
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rule of them, toss trainers when you put them on a flat surface and they ar bowed or can rock. OR 500miles. I rotate two pairs at once, gives the mid sole time to relax. anyway, expensive if you run alot, although no-where near as bas as cycling.