Service

Is your bike due for a service or repair, or would you like to have new accessories fitted?

Easily book an appointment through our online system and choose a time that suits you best. We'll make sure your bike rides as it should again, and quickly.

Make an appointment here

Manuals

If you would like to fit a matching accessory to your Phatfour bike, you can find a range of instruction videos on our YouTube channel.

Click the link for the FLX (S/+) manual:

For the FLS+ and FLB+ we have a general manual.

Insurance

Your Phatfour deserves the best protection. That's why we work with FietsZeker and an international insurance company on insurance specially tailored to fatbikes. From theft to damage: you're covered. So you can set off with peace of mind.

Go straight to Fietszeker.nl

FAQ

How can I insure my fatbike?

Phatfour Nederland works with FietsZeker, an international insurance company specially tailored to fatbikes. Click here for more information.
What can I do to optimise my range?

Several factors influence the maximum distance you can reach.

Tyre pressure
The correct tyre pressure varies per model:

  • FLX, FLXS and FLX+: 2.0 bar
  • FLB+ and FLS+: 2.3 bar
  • FLB: 1.8 bar front, 2.3 bar rear

When the tyre pressure is too low, the range can drop by as much as 35%.

Weight
The total weight of rider and load affects the range. The higher the weight, the faster the battery drains.

Assistance
The way you ride has a big influence on consumption. On high assistance you use more energy from the battery than in ECO mode.

In city traffic you also use more, because you accelerate more often at traffic lights. At a constant speed, consumption is considerably lower.

Weather conditions
The weather also plays a role. At an outdoor temperature of around 5°C, the range can drop by about 20%.

Switching off the battery
Switch off the battery when the bike is not in use. This applies only to the FLB+. The motor controller uses about 4 watts. If the battery stays on, it slowly drains.
What is the best way to resolve an issue with my fatbike?

Service and warranty questions go through the party where the Phatfour was purchased.

Did you buy your bike from a reseller? Then contact the relevant dealer directly. They can help you the fastest.

Did you order your Phatfour directly from us? Then contact us via support@phatfour.com.
How long is the warranty on a Phatfour?

All Phatfour frames come with a 2-year warranty.

All electronic components also carry a 2-year warranty.

Wear parts are in most cases not covered by warranty.

Questions about warranty? Contact us via support@phatfour.com
Service wrench showing on your screen?

On the FLX(+), a service wrench appears on your display after 250 km. This means it's time for your first check-up.

Make an appointment with your dealer to have the bike checked. This is important for the lifespan and optimal operation of your fatbike.
How often does my fatbike need servicing?

Phatfour's fatbikes are carefully built and delivered ready to ride. It's normal for some parts to loosen slightly over time.

To let you ride carefree for years, we recommend the following maintenance schedule:

  • After 250 km: first service
  • After 1,500 km: second service
  • After 2,500 km: third service

Services can be carried out at a Phatfour dealer.

Our dealers can, among other things, check and carry out:

  • Adjusting the brakes
  • Checking the gears
  • Tensioning and lubricating the chain
  • Checking bolts and tightening where necessary
  • Checking tyre pressure

Do you live near Amstelveen? Then you can also make an appointment at Phatfour HQ for service and repairs.
What is the best tyre pressure?

Checking the tyre pressure is an important part of maintaining your fatbike.

Tyre pressure affects range, grip, rolling resistance and comfort while riding. It's therefore important to check it regularly and adjust where necessary.

For the best riding experience, we recommend the following tyre pressure:

  • FLX, FLXS and FLX+: 2.0 bar
  • FLB+ and FLS+: 2.3 bar
  • FLB: 1.8 bar front, 2.3 bar rear
Can I derestrict a Phatfour?

Phatfour is against derestricting fatbikes. It is not permitted to ride faster than 25 km/h on public roads.

Riding a derestricted fatbike can lead to a €320 fine in the Netherlands in 2026.

The Phatfour FLX and FLX+ cannot be derestricted and comply with all applicable regulations.
How fast is a Phatfour allowed to go?

A Phatfour may go a maximum of 25 km/h.

Fatbikes that go faster than 25 km/h on public roads are not permitted and can be confiscated.

In the Netherlands, riding a derestricted fatbike can lead to a €320 fine.
Does cold temperature affect my fatbike's battery?

The outdoor temperature affects your battery's performance. A battery's range and power are best at warmer temperatures.

You can use your fatbike safely in winter too. However, we advise charging the bike preferably at room temperature.

If you park the bike in the cold, make sure the battery is not completely empty.

Regardless of temperature: unplug it as soon as the battery is fully charged.

Want to store the bike for a longer period? Then make sure the battery is charged to around 40–60%. This best preserves the battery's performance.
Do I have to wear a helmet on a fatbike?

Helmet requirements vary by country:

  • Netherlands: No helmet requirement for e-bikes up to 25 km/h
  • Belgium: No helmet requirement for e-bikes up to 25 km/h
  • Germany: No helmet requirement for e-bikes up to 25 km/h, but a helmet is strongly recommended
  • France: No helmet requirement for e-bikes up to 25 km/h (a helmet is mandatory for children under 12)
  • Spain: A helmet is mandatory outside built-up areas and recommended within built-up areas

Please note: local rules can vary by region and situation.
Do you need a driving licence for a fatbike?

For a fatbike like the Phatfour that assists up to a maximum of 25 km/h, no driving licence is required in most European countries.

This applies to the Netherlands, Belgium, Germany, France and Spain, as long as the bike complies with local legislation for electric bikes (assistance up to 25 km/h maximum and 250W motor power).

Please note: the exact rules can differ per country or situation. Therefore always check local legislation if you ride abroad.
From what age can you ride a fatbike?

In most European countries, including the Netherlands, Belgium, Germany, France and Spain, there is no official minimum age for riding a fatbike that complies with the rules for electric bikes (max. 25 km/h assistance and 250W motor power).

Children may in principle ride an e-bike as soon as they can take part in traffic safely and meet any local traffic rules.

For Phatfour we recommend a minimum height of 1.50 metres for a safe and comfortable riding position.

Please note: local rules or exceptions can differ per country or situation. Therefore always check the applicable regulations in the country where you ride.
What is the best fatbike?

The Phatfour FLX is among the best-rated fatbikes in the Netherlands and has achieved strong results in various independent tests.

In 2023, the FLX came out as one of the best in the test at Bright.nl, with a score of 8-. This put Phatfour at the top of the fatbike category.

The Phatfour FLX was also named "Best Tested" in the fatbike category in 2023 by Algemeen Dagblad in collaboration with Fietstest.nl, based on user experiences from testers across the country.

In 2024, the new Phatfour FLX+ model was well rated in the AD Fietstest with a score of 8-.

In addition, the Phatfour FLX was rated by testers on Kieskeurig.nl in 2024 with an average score of 8.2 and named "Best Reviewed".

The ANWB also names Phatfour in their overview of good fatbikes, including the FLX+ as a recommended model within the category.

These independent reviews confirm Phatfour's focus on quality, riding experience and Dutch build quality.
How do you reduce the risk of fatbike theft?

The popularity of fatbikes has increased sharply in recent years. Unfortunately, the risk of theft is rising too. That's why it's important to be mindful about securing your fatbike.

There are various measures you can take to reduce the chance of theft.

Read in our blog which steps you can take to secure your fatbike as well as possible.
Is a fatbike safe?

The Phatfour is designed as a safe bike. The term fatbike refers to an e-bike with wide tyres. The same rules apply to fatbikes as to other electric bikes.

You don't have to wear a helmet or have a driving licence, as long as the bike complies with e-bike regulations: a maximum assistance up to 25 km/h and a motor power of no more than 250 watts.

There is no minimum age in most countries, but the bike must always be used safely and responsibly in traffic.
Is a child seat possible on a fatbike?

With the Phatfour FLB+, FLX, FLXS and FLX+ models, children can be carried safely and comfortably.

FLB+

  • Rear rack with child seat (max. 25 kg)
  • For older children: on the back of the two-person saddle combined with footpegs
  • For older children: on the front of the two-person saddle combined with footpegs

FLX and FLX+

FLXS