I agree with the other poster...I usually can get 300 miles out of my shoes and my hips and knees let me know loudly that its time to replace.  Its possible that you can use your old shoes for shorter runs but it might be helpful to get a new pair and rotate them in for long runs.  Just a thought.  I rotate 2 pair of shoes, alternating each run....gives the shoes a chance to recover.

I agree with getting a new pair and rotating them in.  If the old ones feel hard as cement by comparison, then it's time to retire them.  I weigh about 190, and the mileage I get varies depending on the shoes.  Most of them last 350 but I rarely get more than 400.  And the lightweight trainers I use only for races will probably be retired at 300.

Len

I don't think that your weight will make a big difference.  In my opinion, wear is related more to the surface you run on, how your foot strikes the ground, and how fast you are running.

Your shoes will last a lot longer running on a treadmill than on concrete.  I have a pair of Nike Free's that I use primarily on the treadmill and they are hardly worn at all.

If you don't over- or underpronate, your shoes will probably last longer, since the wear is more evenly distributed.

I think if you are running faster and pushing off with greater force, your will see more wear than if you are moving slowly.  It could be balanced by the fact that slower people are taking more stides to cover the same distance, however.

My shoes wear out at around 300 miles.  You can see a picture of a pair of my old shoes and some info on how to read shoe tread wear patterns in this post:

What You Can Learn from Shoe Wear Patterns

mrbrown66 wrote:

 

Give this a read guys.

 

http://www.scientificamerican.com/blog/post.cfm?id=running-barefoot-is-better-research-2010-01-27

 

I dont even buy shoes anymore.  Its free and no injuries.

If that's all your basing it on, you need to do a whole lot more research.  Barefoot running has been discussed at some length in several threads here over the past months.  I suggest you look for and read through those threads.  Then check the research, which unfortunately is fairly limited and equivocal at this point.  Then discount statements like:  "But actually you can run barefoot on the world's hardest surfaces without the slightest discomfort and pain…It might be less injurious than the way some people run in shoes." , "People who don't wear shoes when they run have an astonishingly different strike", "humans have engaged in endurance running for millions of years", etc., which are, at best, just someone's opinion.  Then consider running on stones and glass and the like. And winter running anywhere north of the Mason-Dixon line.  I can think of lots of situations where you wouldn't want to run barefoot.  Lest you have any doubts, I have run barefoot, and will continue to do so.  But most of my running will be in shoes.

Len

I have nothing new to add to the discussion.  It would be best to stick with the posters about looking into new shoes when your body tells you it's time.  It usually happens near 300 miles or so.  However, get a new pair a little sooner to break them in.

Also, can we not hijack a thread?

Ross.