Runners: How often do you replace your shoes?

http://www.therunnersguide.com/howlongrunningshoeslast/

They say it's more based on the miles you run. Hope this helps!

This information is from Runner's World Magazines website...

http://www.runnersworld.com/article/1,7120,s6-240-490--12954-0,00.html
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When is it time to retire my running shoes?—Ken Becker, Phoenix
Between 300 and 500 miles. Why the range? Because how quickly a shoe wears depends on you. If you land hard on your heels with each stride, for example, you're going to wear through shoes more quickly than more efficient runners. Go by feel. If after a normal run your legs feel as if the shoes aren't providing you adequate protection, they probably aren't. Give your legs a week to make sure it's really the shoes and you're not just tired. If the shoes still feel dead, replace them. We can tell you that the vast majority of runners replace their shoes too late. When you can see white midsole material poking through the outsole or when the sole under the heel looks crushed, the shoes are long past their prime.
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I generally aim for 300-400 miles because of how I hit the ground. Then I retire my running shoes to everyday shoes and buy a new pair for running. It is recommended that you DON"T wear the shoes you are running in as an everyday shoe to help them last longer and get the most wear out of them on the specific purpose you have purchased them for (and that is a hefty investment you are 'just wearing around.")

Shoes have a lifetime in miles/km. I've heard 800-1000km per pair of shoes. The more you run, the more often you will have to replace them. Yeah, it seems like a pain given the expense of shoes, but you don't want to injure yourself from running in unsupportive footwear.

I usually replace mine every 6-8 months and try to use them only for running but when the cushion wears out you can really feel the diference when you try on new shoes how much better those feel compared to your old shoes.

I bought new running shoes from the running specialty store recently. The guy who fitted me for the shoes told me they should be replaced in 6 months. I just dropped $100 on nice shoes and do not see myself dropping another $100 in 6 months. I was hoping this pair would last me a year.

I am a new runner, right now running about 2.5 miles 3x per week. I only use these shoes for running.

There are two factors here: one is your mileage. Shoes are generally good for about 300-500 miles, with heavier runners getting less wear.

The other is time. The midsole, which is what gives you your cushioning, does degrade over time even if you don't use the shoes. They will start to lose some of their shock-absorbing capabilities after 6 months.

Now that you know what shoes you need and in what size, periodically search the internet for good deals. Expos for larger races (half-marathons and marathons) will also usually have great discounts on running shoes and gear and they are usually open to the public.

I buy a new pair each year in the january sales. I do a fair bit of exersizing in them and did 2 triathlons in them last year and really felt I needed a new pair.

If this matters, I usually run on a treadmill. I over pronate a little, so I have shoes with moderate stability in them. I also have plantar fasciatis, so if the cushioning goes in my shoes, I really need to replace them.

So I guess I will start keeping track of my miles, then. I was just a little shocked when he said 6 months... I figured this would be for a serious long distance runner.

You will get a little more wear out of them on a treadmill, yes, as there is a bit of cushioning vs. road running.

If you aren't sure whether you need new shoes, you can always wear your current pair into the store, try on a new pair of the same shoe and take a little jog around the store and see if they feel different. If they do, it's time!

A serious long-distance runner is replacing shoes every 3-4 months.

Running shoe lifetime really depends on the quality and how heavy you are. When I was a lot heavier than I am now, I would blow through a pair of running shoes in three to four months (300 - 400 miles).

I'm actually running in Vibram Finger Fingers now and the lifespan of the VFFs is a lot longer than most running shoes because there's no cushion to break down.