The fall has been survived happily, the abrasions are treated and the bike has survived contact with the ground. Even the derailleur is intact. One important question remains:
Do you need to replace your bike helmet after a fall or can you continue to use it?
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↪ The short answer is: In most cases, you should replace your bike helmet after a fall. |
In this guide, you will learn: why this is the case, what to look out for, and what exceptions there are.
The most important points at a glance:
✅ After a fall, the bike helmet should be replaced in most cases.
✅ Damage inside the helmet is usually not visible from the outside.
✅ Even seemingly minor damage can compromise the protective effect!
✅ Many manufacturers (and first responders!) recommend replacement after an impact.
✅ If the helmet has not been impacted, you can continue to use it.
Fall or impact – when do you need to replace the bike helmet?
This is the actually important point: It is not the fall that damages a bike helmet; the impact is the problem.
- The exception… if you fall and the helmet does not touch the ground → keep wearing the helmet
- Your bike helmet has hit the ground during the fall → definitely replace it
- The helmet has fallen from you → replace the bike helmet
Why a bike helmet can be damaged after a fall
It may sound like pure sales talk, but there is a reason for our recommendation! A modern bike helmet consists of a robust plastic shell and an impact-absorbing foam core. It is this foam that absorbs the impact energy in a serious situation, distributes it over a large area, and thus protects your head from serious injuries.
Something crucial happens: The material deforms permanently. It cannot absorb the energy multiple times.
This deformation is intentional, as it reduces the forces acting on the head. It may sound strange, but the helmet is supposed to break in a fall! In the worst case, the inner shell breaks – this is not visible from the outside! After that, the helmet can no longer provide its full protective effect. In other words, the helmet breaks so that your head does not.
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The bike helmet is like an airbag – it is supposed to protect at the crucial moment, after which it usually needs to be taken out of circulation. |
Do I need to replace a helmet after every fall?
In principle, the rule is: If the helmet has been impacted… replace it!
This is especially true if:
- the head has touched the ground or the other party involved in the accident
- the helmet shows visible damage
- the accident occurred at higher speed
- you were riding with the E-Bike (you are faster there)
- the helmet is already a few years old
1. After an accident with impact
You were involved in a cycling accident and your head hit the ground or a car? No question… whether it’s a road bike helmet, MTB helmet, Gravel helmet, full-face helmet, city or trekking bike helmet – definitely replace it!
2. The bike helmet has been impacted but looks okay – should I still replace it?
Even if no damage is visible, there may be fine cracks inside the helmet, making it unsafe.
3. You don’t know if the helmet has been impacted
Warning – this happens often: The accident leaves many cyclists in shock, and they simply cannot remember whether their head hit the ground or a car bonnet. In that case, the helmet should be replaced. Scratches on the outside of the helmet are an important clue here!
4. The helmet has fallen – does it need to be disposed of?
No question: If the helmet falls to the ground from a certain height, it may be damaged. The height from which it becomes dangerous is hotly debated. You should always take a close look at your helmet; if it falls from more than table height, it could be broken. Important: The nature of the ground. If the helmet landed on carpet or grass, it probably sustained no damage. On asphalt, damage occurs more quickly.
In many cases, you need to weigh: Did the helmet fall from a chair? Or did it fall from a balcony? Whether the helmet is really still okay depends on the exact circumstances. Did the bike fall over with the helmet on the handlebars? Did it fall from your hand or slip off a chair? The helmet is probably fine. If it rolls down a complete staircase or if your 25-kilo E-Bike fell on it – difficult!
5. Do children also need to replace bike helmets after a fall?
Let’s put it this way: If you want to replace the helmet after every fall on a small bike trailer with a 12-, 14- or 16-inch children’s bike (i.e., with 3 to 5 years), you should buy children’s helmets in packs of ten 🙂. Fortunately, small children rarely land on their heads. Another important difference: less fall height and speed, as well as less weight landing on the helmet. But the same applies to a children’s helmet: If it has had a proper fall with impact, it should be replaced. For older children, teenagers, and schoolchildren, the same precaution applies as for adults – fall with impact = new helmet!
Is the bike helmet broken?
Visible damage to the bike helmet
After an accident, you should carefully inspect the helmet.
Look for:
- Cracks in the outer or inner shell
- Dents and visible compressions
- Scratches on the outer shell
- Deformations
- Broken parts
- Damaged straps
- Loose adjustment systems
- Important! Please also check under the padding!
If you find these damages, you should urgently replace your helmet.
Invisible damage inside the helmet
More dangerous than visible damage are small, invisible damages. The most common misconception is: “The helmet still looks good!”. Unfortunately, this says nothing about the condition inside the helmet.
If there are visible damages inside the bike helmet after the accident/fall, please replace it! Image © Fox Racing
The bike helmet after a fall: What the manufacturers say
The manufacturers agree: After a fall, they recommend replacing a helmet. The reason: They know the material very well, and every helmet – bike helmet, motorcycle helmet, and so on – must be tested, as helmets must meet standards. Experience and know-how lead to the recommendation not to use helmets after a fall.
Frequently asked questions
Your helmet must be replaced after an accident – there is no question about it. Here are some answers to frequently asked questions:
Can the helmet be worn directly after the fall?
Until you have a new helmet, you should definitely wear the old one. It is better than no helmet at all (especially for insurance!)
How much does a new bike helmet cost?
Many cyclists hesitate to replace it – the helmet still looks good and besides, it was still quite new…
Then ask yourself this question: What is more expensive? A new helmet or a head injury? High-quality bike helmets are available at a low price. A broken head cannot be replaced!
Brand helmets can be purchased from around 50 to 70 euros, depending on the equipment and design; during sales, they are even significantly cheaper.
How long does a bike helmet last without an accident?
Even without a fall, a new helmet will eventually be necessary! Tests have shown that the material ages and then no longer provides adequate protection. It does not depend on how much you have worn the helmet; UV radiation, heat, or sweat accelerate material aging, after about five years you need a new helmet.
How do you find a suitable new bike helmet?
In the BMO online shop, there are many buying guides, and here in the blog, we have a current helmet guide for you!
Conclusion: After a fall, it's better to be safe!
A bike helmet protects your head exactly when it matters. But after an impact, its protective effect may be significantly reduced, even if no damage is visible.
Therefore, the recommendation:
👉 If your helmet has taken a hit, you should replace it.
A new helmet costs money, but you can get on your bike with a good feeling and enjoy the ride to work, the training round with a road bike or mountain bike, or the bikepacking tour to the fullest.
Information about bike helmets in the Bike Blog
Bike Helmet Guide 2026 | Does a bike helmet have a limited lifespan? | What size should a children’s helmet have? | Test: iXS Trigger MTB Helmet | Test: Leatt Fullface Helmet DBX
⛑️ Bike helmets in the BMO online shop ⛑️
Road Bike Helmets | Gravel Bike Helmets | Trekking & City Bike Helmets | MTB Helmets | Fullface Helmets | BMX Helmets
🧑🧑 Bike helmets for the whole family 🧒 🧑
Bike Helmets for Children | Bike Helmets for Women | Men's Helmets | MIPS Helmets
Title image: Atlantic Ambiance
