Can you stockpile running shoes?
Quick answer
Yes, if you'll run through them within about a year. Unworn shoes still age. The glue and foam break down slowly on the shelf, and faster in heat and humidity. Keep them boxed somewhere cool and dry, run the oldest pair first, and don't buy more than you'll wear out in a year.
You've found the shoe that works for you, and it's on sale. Brands change a model every year, and the update doesn't always keep what you liked. So buying a few pairs while you can makes sense.
It works, with one catch: a shoe starts aging when it's made, not when you first run in it.
What ages in a shoe you never wear
- The glue. The upper is glued to the midsole. Brooks says unworn shoes deteriorate over time, "especially adhesives". A Fleet Feet store owner puts it plainly: it's usually the glue that goes first, even on a shelf.
- The foam. Midsole foam slowly loses its ability to absorb impact as it ages, worn or not.
- Heat and humidity speed both up. Cold stiffens foam, so a pair kept somewhere cold cushions less until it warms up.
How many to buy
Buy what you'll wear out in about a year. If a pair lasts you 400 miles and you run 30 miles a week, you go through about four pairs a year. Two or three spares is plenty.
Remember that sale shoes are often older stock. The clock started at the factory, not when you paid. Fleet Feet suggests starting a pair within 6 to 12 months of buying it, and buying the outgoing model within a few months of the new one's release, while it's still fresh.
| Time in storage | What to expect |
|---|---|
| Under a year | Runs like new, if it was stored well. |
| One to two years | Usually fine. Check it before you trust it on a long run. |
| Longer | Less cushioning and fewer miles, maybe 200 to 300 instead of 400 to 500. The glue may let go. |
This is a rough guide, not a lab result. Storage matters more than the calendar.
How to store them
- Keep them indoors, where you'd be comfortable. Not the garage, attic or car trunk.
- Leave them in the box, out of sunlight.
- Write the date you bought them on the box, and run the oldest pair first.
Check an old pair before you trust it
- Look at the glue line where the upper meets the midsole. Any gap or lifting edge means the glue is going.
- Look at the midsole. Deep cracks or crumbling are a no. Press it with your thumb and compare it with a pair you know.
- Make the first run short and easy. If something starts to ache that didn't before, and you haven't added miles, the shoe is the likely cause. Retire it early.
The money only works out if the shoes last. A pair bought at 30 percent off that gives you 30 percent fewer miles hasn't saved you anything.
More questions
Do running shoes expire if you never wear them?
There's no expiry date, but they do age. Brooks says unworn shoes deteriorate over time, especially the adhesives. Kept cool and dry, a pair should run like new for months. After a couple of years, expect less cushioning and fewer miles.
Is it worth buying last year's model on sale?
Usually, if you buy soon after the new model comes out. Those pairs are fresh. A pair that has sat in a warehouse for a long time may not last its full mileage, which can cancel out the discount.
Should I keep spare shoes in the box?
Yes. The box keeps out light and dust. Store it indoors, where you'd be comfortable yourself, not in a garage, attic or car.