After a fatbike accident, liability depends on how the fatbike is classified in law. If you are hit by a car while riding an ordinary fatbike, the driver is in principle liable under Article 185 of the Dutch Road Traffic Act (Wegenverkeerswet). If the fatbike has been tuned up and qualifies as a motor vehicle, different rules apply and insurance is compulsory.
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Written by Onur Arslan, attorney at Arslan Advocaten. Registered in the specialisation register of the Netherlands Bar for employment law and personal injury. Last updated: 17 September 2026.
Fatbikes have become hugely popular in recent years, particularly among teenagers and young adults. At the same time, the number of fatbike accidents is rising. After a collision, uncertainty often arises straight away: is a fatbike a bicycle or a moped, who is liable, and what happens if the fatbike has been tuned up?
In this article we explain in detail what your rights are after a fatbike accident, how liability is assessed and which losses you can recover in a personal injury claim.
What is a fatbike in legal terms?
A fatbike is, in principle, an electric bicycle with wide tyres. In law, however, what matters is not how the vehicle looks but its technical characteristics.
A fatbike counts as an electric bicycle when:
- the pedal assistance cuts out at 25 km/h;
- the motor only assists while you are pedalling;
- the power output does not exceed 250 watts.
If these conditions are not met, the vehicle is no longer a bicycle but a moped or even a motor vehicle.
Fatbike accidents and liability
In a fatbike accident, liability depends heavily on the parties involved and the nature of the fatbike.
Fatbike hit by a car
If you are hit by a car while riding a fatbike, in many cases the protection for vulnerable road users applies. The motorist is then in principle (largely) liable, even if you were not entirely without fault yourself.
You can read more about this on our page on vulnerable road users in traffic.
Accident between a fatbike and a cyclist
In a collision between a fatbike and an ordinary cyclist, each party’s traffic errors are examined. The court assesses who acted carelessly.
Single-vehicle fatbike accident
In a single-vehicle accident, for example a fall or a poor road surface, there is often no liable other party. In that case your own insurance, such as personal accident insurance or SVI cover, may offer a solution.
Tuned-up fatbike: major consequences for liability
Many fatbikes are tuned up so that they go faster than permitted. It is precisely in an accident involving a tuned-up fatbike that serious legal problems arise.
If the fatbike has been tuned up:
- the vehicle often loses its status as a bicycle;
- it may be an uninsured motor vehicle;
- contributory negligence may be found;
- the compensation may be reduced or refused.
In addition, the rider may personally be held liable for damage caused to others.
Fatbike accidents involving children and young people
Many victims of fatbike accidents are minors. Special protective rules apply to personal injury suffered by children.
Even when a child makes a mistake, liability is often placed (largely) on the other party. At the same time, parents may be held liable where a tuned-up fatbike is involved.
What injuries are common in fatbike accidents?
In fatbike accidents we regularly see serious injuries, such as:
- fractures of the arms, legs or collarbone;
- head and brain injuries;
- dental and facial injuries;
- whiplash complaints;
- permanent scarring;
- psychological complaints, such as fear of traffic.
What losses can you claim after a fatbike accident?
After a fatbike accident you can claim various heads of loss, depending on your situation.
Financial loss
- medical expenses;
- travel expenses;
- costs of domestic help;
- costs of aids and equipment;
- damage to clothing or personal belongings.
Loss of income
Are you unable to work or study because of the accident? Then you may lose income. Loss of earning capacity can also be compensated.
Compensation for pain and suffering
In addition, you are often entitled to compensation for pain and suffering (smartengeld): compensation for pain, grief and loss of enjoyment of life. You can read more about this on our page on compensation for pain and suffering in personal injury cases.
Contributory negligence in a fatbike accident
In fatbike accidents, insurers regularly raise a defence of contributory negligence. For example, in the case of:
- riding without lights;
- not wearing a helmet (on tuned-up fatbikes);
- tuning up the fatbike;
- dangerous riding.
Contributory negligence can lead to a reduction in compensation, but by no means always means that you receive nothing.
What should you do after a fatbike accident?
After a fatbike accident, it is important to act quickly and carefully.
- seek medical help and have your injuries recorded;
- call the police if there are injuries or a dispute;
- note the details of those involved and any witnesses;
- take photographs of the scene and the vehicle;
- keep all medical and financial documents;
- obtain legal assistance.
You will also find more general information on our page personal injury lawyer.
What if the other party is uninsured?
If the other party is unknown or uninsured, the Dutch Motor Insurers’ Guarantee Fund (Waarborgfonds Motorverkeer) may in some cases compensate the loss. Strict conditions apply here as well.
Limitation period for fatbike personal injury claims
A claim for damages after a fatbike accident is usually time-barred five years after the moment you became aware of who is liable and that you have suffered loss.
Different rules apply to minors. So do not wait too long.
Will legal assistance cost me money?
In personal injury cases, the costs of legal assistance are in most cases recovered from the liable party or its insurer. As a result, you as the victim ultimately bear no financial risk.
Why choose Arslan Advocaten?
Fatbike accidents are legally complex, especially where tuned-up vehicles and young riders are involved. We have extensive experience with personal injury after fatbike accidents and know how insurers reason.
We assess liability, guide the gathering of evidence and work to obtain the maximum compensation.
Would you like to know whether you are entitled to compensation after a fatbike accident? Feel free to contact us for a free, no-obligation assessment.
Read also
- What does a personal injury lawyer do?
- Compensation for burnout or work-related stress: when is the employer liable?
- Chronic pain syndrome after an accident: the right to compensation
Frequently asked questions
What is a fatbike in legal terms?
A fatbike is in principle regarded as an electric bicycle if it meets certain technical conditions, such as a maximum speed of 25 km/h and a power output of no more than 250 watts. If the fatbike does not meet these criteria, it is regarded as a moped or motor vehicle.
Who is liable when a fatbike is hit by a car?
In most cases the motorist bears liability, because the fatbike rider is protected as a vulnerable road user. This also applies if you were not entirely without fault yourself.
What happens in a single-vehicle fatbike accident?
In a single-vehicle accident, such as a fall or a poor road surface, there is often no liable other party. In that case you may be able to recover your loss through your own insurance, such as personal accident insurance.
What legal problems can arise with a tuned-up fatbike?
A tuned-up fatbike may lose its status as a bicycle and may be regarded as an uninsured motor vehicle, as a result of which liability and compensation may be reduced or refused. The rider may also personally be held liable for damage caused to others.
