When to replace your motorcycle helmet

Motorcycle Helmet

The general rule is to replace your motorcycle helmet every five years, but what if you drop it, sweat heavily or wear it every day?

The biggest myth is that if your helmet falls off your bike when it’s parked, you should change your helmet. That’s probably put around by helmet retailers.

Certainly you should check the helmet and it might depend on how far it fell and rolled. However, even though helmets are a one-use product designed to protect you in a crash and then get thrown away, they are pretty robust.

At least the helmets allowed in Australia are robust, especially now that UNECE 220.5 helmets are permitted.Custom 500 Bell motorcycle helmet

However, I wouldn’t trust some SE Asian helmets if they fell on a feather pillow.

Most helmets will easily withstand the general knocking they get in daily life. If they don’t, then you really have to wonder about their ability to protect you in a crash.

That doesn’t mean you can throw your helmet around. You need to treat a helmet with respect and care and store it in a cool, dry place.

The outside shell – plastic, fibreglass or carbon fibre – is pretty tough, but keep it away from petroleum-based products such as fuel, cleaners and paint.

It’s the interior foam that deforms to absorb the impact in a crash and protect your head. So that means that you shouldn’t store any heavy objects in your helmet. If it drops with something heavy in it, then it will damage the helmet.

Motorcycle Helmet
Shoei’s shell survived a bike riding over the top

Also, be careful how you hang your helmet on a hook as this can deform the interior foam.

If you feel the need to inspect a helmet after you’ve dropped it, you could probably get it x-rayed by a professional. However, if it’s been such a big drop or a frequent number of knocks that you are concerned, then you should just bin it anyway.

General helmet use means a helmet will last for about five years. The glues, resins and other materials used in the making of the helmet can lose their effectiveness and also deteriorate the lining.

You can prolong your helmet if you store it properly when you’re not using it. Keep it in a cool, dry place and store it inside the helmet bag in which it came.

It’s not the outside that deteriorates, but the inside foam and fabric lining. If you notice the helmet getting loose or some of the lining coming out or it leaves little black flakes in your hair, then it’s time to retire it, whether it has reached the five years or not.

Frequent use, sweating in your helmet, having greasy hair or using a lot of “hair product” can all aid in compacting the foam and making the interior lining degenerate faster than normal use.

You can also prolong the life of your helmet interior by wearing a helmet liner, balaclava or scarf that keeps the sweat off.

Another good reason to replace your helmet every five years is that helmet technology is advancing all the time and a new helmet is going to offer more protection than something five years old.


  1. I bought another ” NEW BILT ” helmet from Redwood City Cycle gear because they would not honor a 5 year warrantee on a bilt helmet with pealing clear coat, ( they said I needed to replace helmet soon as it was getting close to 3 years old ) So get this ( They sold me a New Helmet That Was Already 4 1/2 Years old Date of manufacture older than my first helmet with pealing clear coat ) Ain’t that some $hit ! I think I’m done with Cycle Gear.

  2. question i have a shoei helmet noreagi harma i think, its never been worn been kept in it’s helmet bag in its box in the loft for at leasr 12 years, is this still usable

    1. Hi Russ,
      Sad to say the lining will have deteriorated and made it useless.
      If you are lucky, you may be able to buy lining inserts that fit, but I doubt it.
      Still, it’s a great showpiece for the mantle.

    1. Hi Daniel,
      It depends on how those chips were obtained: was it just an accidental scrape on an object while carrying your helmet; did it fall off your bike seat while you were fuelling up; or was it involved in a crash?
      Check the inside for any fractures in the shell. If there are no obvious cracks and it was only a minor incident, it should be ok.

  3. Not enough information on destruction testing of OLD helmets to know what fails.
    The amount of use must be a consideration, assuming materials used are of high standard and not breaking down with time ….. how old is that brand new helmet on the shelf and does it have a shelf life?
    Polyurethane foam turns to greasy dust over time, polystyrene looks fine but is rumoured to explode on impact when it gets old. Polycarbonate is supposed to have actinic degredation (sunlight breakdown) over time, and go brittle. Polycarbonate also can go brittle when painted, and smash on impact.
    WE NEED MORE INFORMATION to make our own informed decisions on when to replace helmets.

  4. Since I have never seen a test of so called damaged helmets, it is hard to believe that they don’t work, even with a few scrapes. Usually you don’t want to wear them because they look bad. I would like to see the fail tests of used helmets as compared to the same unit brand new. I usually replace my helmets based on miles. Rarely get over three (or 4) years or 75K on a helmet.

  5. Japanese and italian helmets seem to be the best for me. I’ve ridden for a long time and tho I never crashed, their comfort and design wins me over.

  6. I ride in Thailand. It’s hot and sweaty. I keep a week’s bag of fresh helmet balaclavas in my top-box, and change them daily, like my socks. I call them headsocks. Helmets last longer and don’t stink

  7. When I took my riding course, they recommended to replace it after 5 years only because of the sun exposure degrading the materials – So if you’re a mild user, surely you’d get more time on its life.

    1. Yeah, probably….but how much longer? Six months, one year, three years longer? How will you know and do you want your head to be the thing that finds out you waited too long?

      1. 5 years is just a guess. I’ve never seen a study where an older helmet was cut open to examine the protective foam. I’ve never seen a study by Snell or DOT where older used helmets were subjected to an impact test.

        Snell does update its standards about every 5 years. Maybe that’s were the idea came from,
        but there is no way to tell if a 5 year old helmet is safer than a 6 or 7 year old one.

        Any brand of helmet may just barely meet Snell stands or is off the chart for safety.
        Snell doesn’t report that. More expensive helmets made today may exceed future standards. I suspect they do while less inexpensive ones will fail.

        The 5 year lifespan is a guess.

  8. Good atricle. Another point to mention is the women’s helmets degrade faster than men’s because we wear a lot of product in our hair, therefore the interior of the helmet rots out faster. Just another reason to wear a “dew” rag.

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