Want to get more speed out of your fatbike? You're not the only one: fatbike derestricting is one of the questions our WhatsApp specialists get asked most. In this complete guide for 2026, we explain exactly what derestricting involves, how it works technically (display or controller), what it costs, which Ouxi and QMWheel models can be tuned, and where you stand legally. So you'll know exactly what you're getting into.
What is fatbike derestricting?
Every fatbike sold as an e-bike is limited to 25 km/h as standard. That limiter isn't in the motor itself, but in the electronics that control the motor. Derestricting simply means raising that limit by replacing one part: the display or the controller. With a tunable version, depending on your model, you'll reach a top speed of 45 to 60 km/h. There's no software hack or shady app involved; it's a physical part you fit — a tuning kit, in other words — and that's all it takes.
How it works technically: tuning the display or the controller?
There are two routes to making your fatbike faster. Which route makes sense depends on your model and on what you want to achieve.
Route 1: replacing the display
The display is the small screen on your handlebars showing your speed and battery level. A tunable display has modified firmware with a higher speed limit. This is the most popular and easiest route: old display off, new one on, done. For Ouxi models, the HC80 tunable display (50 km/h) is the best-known choice, complete with code protection and a killswitch. Riding an Ouxi 2.0? Then look at the M5 display. For QMWheel there's the H6C tunable display (45 km/h).
Route 2: replacing the controller
The controller is the box that regulates the power from the battery to the motor — the brain of your fatbike. A tunable controller delivers more amps (for example 21A instead of 6A), so your motor not only reaches a higher top speed but also accelerates noticeably quicker. Think of the V8/C80 tunable controller for Ouxi or the V20 Pro tunable controller for QMWheel. When ordering, pay close attention to the colour of your motor plug (red or black): it determines which controller fits your bike.
What does derestricting a fatbike cost?
The cost depends on your model and on whether you choose a display or a controller. Either way, a tuning kit is far cheaper than buying a new, faster fatbike. You'll always find the current prices on the product pages in our tuning kits collection. Order before 23:59 and your tuning kit will be delivered tomorrow. Buy now, pay later is also available, and our parts come with up to 3 years of warranty.
Which fatbikes can be derestricted?
Derestricting an Ouxi
- V8, V8 Pro, V8 Max, C80, C80 Pro, C63, H9 and Q8: tunable via the HC80 or M5 display (up to 50 km/h) or via a tunable controller.
- GT2000: this powerhouse is tuned via a special controller, good for a top speed of up to 60 km/h.
Derestricting a QMWheel
- V20, V20 Pro, V20 Max, S20 and V30: tunable via the H6C display (45 km/h) or via a tunable V20/V20 Pro controller.
- V20 Mini: not sure whether your version is suitable? Message our specialist on WhatsApp and we'll take a look with you.
Not sure which display or controller is fitted to your fatbike? Send a photo via WhatsApp and we'll find the right part for you.
How difficult is the installation?
Tuning a display is truly plug-and-play: take the old display off the handlebars, swap the connector over, secure the new display. Usually all you need is an Allen key, and it's done within fifteen minutes. Replacing a controller is a step more challenging: the controller sits in or under the frame and you'll need to swap over several plugs. Take your time, photograph the cables before you disconnect them, and check whether your fatbike has a red or black motor plug before ordering. If you get stuck during installation, our specialist is ready to help via WhatsApp.
The legal side: where can you ride?
We're upfront about it: derestricting comes with rules. Please note: a derestricted fatbike is only permitted on private/enclosed grounds; on public roads a 25 km/h limit applies. Good to know: many tunable displays, such as the HC80, have a killswitch that takes you back to standard mode in one move. That way, you decide where and when to use the extra speed.
Frequently asked questions about fatbike derestricting
How fast does a derestricted fatbike go?
It varies per model: Ouxi models reach up to 50 km/h with a tunable display, QMWheel models up to 45 km/h, and the GT2000 even hits 60 km/h with a tunable controller.
Can I derestrict my fatbike myself?
Yes. Replacing a display is plug-and-play and almost anyone can do it. Replacing a controller takes a little more skill, but with basic tools you'll get a long way. Stuck? Our WhatsApp specialist will help you step by step.
Do I keep my warranty after derestricting?
The tunable displays and controllers themselves come with up to 3 years of warranty from us. Do bear in mind that modifying your fatbike may affect the manufacturer's warranty on the bike itself.
Ready to make your fatbike faster? Browse all tunable displays and controllers in the tuning kits collection and order before 23:59 for delivery tomorrow. Not sure which tuning kit fits your model? Send our specialist a quick message via WhatsApp — we're happy to help, and buy now, pay later is also available.
