A running shoe typically lasts between 600 and 800 km (about 375 to 500 miles). You should replace it when the cushioning flattens out, the outsole goes smooth, the shoe leans to one side when set on a flat surface, or new aches appear after your runs.
At Boréal, we've been fitting runners around Quebec City for more than ten years, and one question comes up constantly: "Are my shoes still good?" Worn-out shoes cushion less, protect less and raise your injury risk. Replaced too soon, they cost you a pair that still had kilometres left. Here's how to know exactly when to replace your running shoes, without guessing.
In short
- Average lifespan: 600 to 800 km (about 375 to 500 miles) for a road shoe, and often less for a carbon-plated racing model.
- The 4 signals to watch: flattened cushioning, a smooth outsole, a deformed upper, and new aches after your runs.
- The quick test: set the shoe on a table and look at it from behind. If it leans, the midsole is worn on one side.
- Our tip: track your mileage and rotate two pairs to wear them out more slowly.
Not sure? Bring your shoes in store: our team checks the wear with you and points you to the right pair, extended widths included.
In this guide
How many kilometres does a pair of running shoes last?
The short answer: between 600 and 800 km (roughly 375 to 500 miles) for a classic road running shoe. Most manufacturers actually recommend replacing shoes between 500 and 800 km depending on the model. It's a good benchmark, but only a benchmark: real lifespan depends on the foam, your weight, your stride and the surfaces you run on.
What "dies" first is the cushioning. The midsole foam (often EVA- or TPU-based) compresses with every stride. After a few hundred kilometres, it packs down and loses its bounce: the shoe protects your legs less, even if the upper still looks new. That's why we talk about mileage rather than appearance.
In time, it roughly works out like this: a runner logging 30 to 40 km per week wears out a road pair in about 4 to 6 months. Someone running 15 km per week can keep the same pair for nearly a year. Mileage stays more reliable than the calendar.
| Shoe type | Lifespan (km) | In time (≈) | First wear sign |
|---|---|---|---|
| Road, standard cushioning | 600–800 km | 5 to 7 months | Cushioning flattening |
| Carbon-plate racing | 300–500 km Elite: 100–250 km | 3 to 4 months | Fading responsiveness |
| Trail | 500–800 km | 4 to 7 months | Rounded-off lugs |
| Winter / rugged use | 700–900 km | 1 to 2 winters | Outsole and grip |
| Minimalist / low cushioning | 500–700 km | 4 to 6 months | Outsole wear |
Indicative benchmarks, for about 30 km per week. Your real mileage varies with your weight, stride and terrain. Special case: on elite-level racing models, the foam can lose its responsiveness very quickly — often after just 100 to 250 km of fast running. Conversely, a max-cushioned model absorbs more, without being eternal either. To pick your cushioning level, see our guide on minimal, moderate or maximum cushioning.
Common mistake
Many runners wait until the outsole is completely worn before replacing their shoes. In reality, the cushioning often loses its effectiveness well before the outsole goes smooth. In other words, a shoe can be "done" while it still looks fine underneath.
The 7 signs it's time to replace your shoes
Haven't tracked your mileage? No problem. Worn-out running shoes send fairly clear signals. If you tick off two or three, it's probably time to shop for a new pair.
1. The cushioning has flattened
The shoe feels "flat," harder underfoot, less lively than before. This is the most important sign, because cushioning is what protects your joints. Press the foam with your thumb: if it no longer springs back the way it did when new, it's tired.
2. The outsole has gone smooth
Look at the bottom. If the rubber is smoothed down at the contact zones (outer heel, forefoot) to the point where you can see the lighter foam underneath, the grip and protection are gone. On wet ground, it turns slippery.
3. The upper is torn or deformed
A hole near the toe, a collapsed heel counter, deep creases that no longer hold the foot: the upper isn't doing its job anymore. The foot moves inside the shoe, which wears the other components even faster.
4. New aches appear
Knees, hips, shins or an arch that start to complain after runs that used to feel fine — that's often the first real signal: the cushioning no longer absorbs impact. The body feels a tired shoe before your eyes do.
5. A shoe leans when you set it down
On a table, viewed from behind, the shoe tilts inward or outward. The midsole has compressed unevenly: the shoe no longer supports you squarely, which can alter your stride.
6. You've passed 600 to 800 km
Even with no obvious visible sign, beyond this range the cushioning has lost much of its properties. If you track your mileage on a watch or an app, that's your best objective indicator.
7. A new pair makes all the difference
The ultimate test: slip on a brand-new pair of the same model. If the gap in comfort and bounce is striking, the old one was truly "done." We get used to wear without noticing, until that comparison.
The quick at-home test
Three 30-second checks, no tools, to tell whether your running shoes are worn out:
The table test. Set both shoes side by side on a flat surface and crouch down to look at them from behind. They should stay upright. A clear lean reveals a midsole that has collapsed on one side.
The twist test. Hold the shoe at both ends and gently twist it. A new road shoe resists a little. If it wrings out like a rag, the structure has given up.
The thumb test. Press firmly on the midsole. The foam should sink in, then rebound. If it stays crushed or feels hard as wood, the cushioning is finished.
What wears your shoes out faster
At equal mileage, two runners don't wear their shoes out at the same rate. Here are the main factors that change how long your running shoes last.
- Your weight and stride. More load and a pronounced heel strike compress the foam faster.
- The surface. Asphalt and concrete are more abrasive than a track or soft trails. The treadmill, on the other hand, is gentle on the outsole.
- The type of foam. Light, highly responsive racing foams, like those on carbon-plate shoes, deliver exceptional bounce but fade sooner than sturdy training foams.
- Weather and salt. In Quebec, winter road salt, moisture and drying cycles attack the glues and materials. Winter running shoes built for it hold up better through the cold season.
- Care. A shoe machine-washed, dried on a radiator or left wet ages noticeably faster.
The trail case: watch the lugs
When to replace your trail running shoes is a slightly different question. A trail shoe's lifespan also sits around 500 to 800 km, but the number-one marker isn't the cushioning: it's the lugs. Once they're rounded off and their height has melted away, grip drops in mud, on wet rock and on descents — exactly where safety matters most.
Terrain also wears things unevenly: rocks and roots chew up the outsole and can peel off the rock plate or toe bumper. A pair of trail running shoes with smoothed-out lugs can still serve on easy road, but it's no longer reliable on technical trail. To choose your next pair, see our guide on how to choose trail running shoes.
How to extend your shoes' life
You can't make a shoe last forever, but a few simple habits easily add kilometres before replacement:
- Rotate two pairs. By alternating, you let the foam recover between runs and each pair lasts longer. We explain why in our article on whether you should rotate your running shoes.
- Keep them for running. Walking, gardening or shopping in your running shoes adds mileage that does nothing for your running.
- Take them off with your hands, not your feet. Undoing the laces and not crushing the heel preserves the shoe's heel counter.
- Air-dry them. Away from direct heat, stuffed with newspaper if they're soaked. Never in the dryer.
- Clean them by hand. Lukewarm water, a soft brush, a little soap. The washing machine damages the glues and foams.
Frequently asked questions
After how many kilometres should you replace running shoes?+
Generally between 600 and 800 km (about 375 to 500 miles) for a road shoe. Count on 300 to 500 km for a carbon-plate racing model, and 500 to 800 km for a trail shoe. These are only benchmarks: your weight, stride and terrain shift the number.
How can I tell when to replace my shoes without counting kilometres?+
Go by the wear signs: cushioning that feels flat, an outsole gone smooth, a deformed upper and, above all, new aches after your runs. The table test (the shoe leans when viewed from behind) confirms a midsole worn on one side.
How many months do running shoes last?+
It depends mostly on your volume. A runner logging 30 to 40 km per week usually changes pairs every 4 to 6 months; at 15 km per week, a pair can last close to a year. Mileage stays more reliable than the calendar.
When should you replace trail running shoes?+
Around 500 to 800 km, but watch the lugs above all: once they're rounded off and their height has melted away, grip becomes risky on trail. A pair with smoothed-out lugs can live out its days on easy road, but not on technical terrain.
Should you replace both shoes at the same time?+
Yes. Both wear out together, even if one looks in better shape. Running with a mismatched pair (one new, one worn) throws off your stride and raises your injury risk.
Do shoes wear out even if I don't wear them?+
A little, yes. Over time, foams and glues age, especially in heat or humidity. A new pair left in a box for several years loses some of its bounce before the first kilometre.
The bottom line
Replacing your running shoes at the right time is the simplest thing you can do to keep running happy and injury-free. Track your mileage, trust the wear signs, and when doubt creeps in, trust your legs: they feel a tired shoe before your eyes do. And if you're moving on to a new pair, our guide on how to choose running shoes helps you aim right.
Not sure whether your shoes are still good? Drop by the shop with your pair. We'll check the wear for free and tell you whether they've got a few hundred kilometres left or whether it's time to replace them.
Shoes feeling tired? We'll check the wear with you, for free, extended widths included.
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