S20 Pro - Tunable Controller (Red Motor Plug)
Frequently bought together
This controller only fits if the inside of your fatbike's motor plug is this colour. Not sure? You can check it in 1 minute.
Please note: if you pick the wrong colour, the plug won't fit and the controller won't work on your fatbike.
Ordered before 23:59, delivered tomorrow
Home delivery in the Netherlands, Belgium & Germany
Easy to install
14-day returns
Product information
The benefits at a glance
- Tunable up to 45 km/h
- Restricted: 6 km/h throttle
- 5 cables, no alarm
Suitable for: QMWheel S20 Pro
Version: Red motor plug, 21A (500W)
Speed: tunable up to 45 km/h
Looking for a new controller for your QMWheel S20 Pro? This controller replaces your faulty or damaged controller as an original part and delivers durable performance. It is developed with the latest software, comes in compact packaging and is easy to fit yourself.
Please note: riding tuned is only allowed on private or enclosed property; on public roads a maximum of 25 km/h applies.
Fits: QMWheel S20 Pro
(Check carefully that the part matches your own part to avoid disappointment)
Fitting a new controller on your QMWheel S20 Pro is actually very simple: there are only 5 cables you need to connect. Still not working out? Just message us on WhatsApp at 06 82090642 and we will help you out quickly.
Pro tip: take the saddle off the bike first, that way you can easily reach the controller to replace it.
Important: this controller is intended for the QMWheel S20 Pro and only works in combination with a red motor cable. Do you have a different fatbike model? Then you need a controller that matches it. On our site you will find the right controller for your model.
Why choose us?
Delivery across the Netherlands, Belgium and Germany
Fast, reliable home delivery in the Netherlands, Belgium and Germany.
Safe and fast checkout
Pay easily with iDEAL, Wero, Bancontact or credit card in a fully secure environment.
Up to 3-Year Warranty
All bikes include a warranty of up to 3 years on the frame. The battery and all moving parts are covered by a 1-year warranty.
Delivered fully assembled
Your fatbike arrives ready to ride. Hop on right away, no assembly worries!
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You have questions, we have answers!
Everything you want to know about fatbikes, tuning and our service.
Why choose fatbikeklaar.nl?
We specialize in tunable fatbikes and parts. Over 500 happy customers have gone before you. Fast delivery, sharp prices, and customer service that truly thinks along with you.
Can I have my fatbike tuned by you?
Our fatbikes are tunable, and we also supply individual parts to upgrade your fatbike. Please note: tuning is only permitted on private property, not on public roads.
Is a fatbike still legal?
Yes, a fatbike that complies with current regulations (max. 25 km/h pedal assist and a 250W motor) is fully legal on public roads. Tuned models may only be used on private property.
What are the new fatbike rules for 2026?
As of 2026, stricter rules apply around age, helmet requirements, and vehicle specifications. Check our information page for the latest details.
Do you need a driver’s license for a fatbike?
You don’t need a driver’s license for a regular fatbike with pedal assist up to 25 km/h. You do for tuned models above that limit. Keep in mind those are only allowed on private property.
Why buy a fatbike?
A fatbike is comfortable, fast, and ready for any terrain, from city streets to the beach. Ideal for commuting and for fun. And with our tunable models, you get even more out of it.
Do you need a helmet on a fatbike?
A helmet is strongly recommended for your own safety. From 2026, a helmet requirement will be introduced for certain fatbike categories.
What does tuning a fatbike cost?
A tunable controller costs from 98 euro for the V20 family and the Ouxi models, and 179 euro for the GT2000. Fitting it yourself usually takes less than half an hour. Not sure which part fits your fatbike?
FatbikeKlaar, tune it up and hit the throttle!
Welcome to Fatbikeklaar.nl, your reliable online shop for fatbikes, e-bikes and electric folding bikes. Whether you ride through the city every day or are looking for extra comfort and stability, at Fatbikeklaar.nl you will find a carefully selected range for every type of ride.
All our fatbikes and e-bikes are 100% legal for use on public roads, fitted with 250W motors and wide tyres for extra grip and stability. We also offer a wide range of electric folding bikes, ideal for commuting and daily use.
With 65+ reviews and 500 satisfied customers, at Fatbikeklaar.nl you choose proven quality, service and reliability. You can also take advantage of our current Warehouse Clearance, available online while stocks last.
Why choose a fatbike?
Choosing the right bike starts with how you use it. Below we explain the main advantages of each type:
Wide tyres provide extra stability and comfort. Ideal for daily use and varying surfaces such as cobbles and poor road surfaces.
Do you need a driving licence for a fatbike?
No. You do not need a driving licence to ride a fatbike. Fatbikes fall under the rules for normal e-bikes (250W motor and pedal assist). As a result there is no driving licence or helmet requirement.
Our brands at Fatbikeklaar.nl
OUXI Fatbikes
OUXI offers an accessible entry into electric fatbiking with a strong focus on comfort and ease of use. Thanks to the sturdy frame, predictable assistance and wide tyres, OUXI fatbikes are very well suited to city rides and daily use.
QMWheel Fatbikes
QMWheel is known for reliable all-round fatbikes with stable handling and a solid finish. The combination of powerful assistance, a comfortable riding position and durable components makes QMWheel an excellent choice for daily use and longer rides.
Why choose Fatbikeklaar.nl?
At Fatbikeklaar.nl it is all about quality and convenience. You benefit from:
- Shipping throughout the Netherlands & Belgium
- 3-year warranty on the frame
- 1-year warranty on moving parts and the battery
- Fully assembled delivery to your door
- Repair and maintenance service
- A wide choice of fatbikes
- Backed by 65+ reviews and 500+ satisfied customers
Parts and accessories
For anyone who cycles a lot, reliability is essential. That is why Fatbikeklaar.nl offers a wide range of parts and accessories that fit our models perfectly.
Why order parts and accessories from Fatbikeklaar.nl?
- Wide range, available immediately
- Locks approved from ART 2 to ART 4
- Top quality
- A perfect fit
- Fast delivery from stock
Complete your fatbike, e-bike or electric folding bike with the right parts and accessories for extra comfort, performance and safety.
Customer Reviews
Our S20 Pro runs like it used to again.
The cables came out exactly right. It all went smoothly.
Set it up exactly as explained on the site. I got a proper reply to my email. Completely satisfied.
For the S20 Pro this was the right one. Not quiite the same shade as in the photo.
The S20 Pro starts up normally again.