Tuning the S20 / S20 Pro: which display and which controller

Please note: tuning is only intended for use on private or enclosed property. On public roads in the Netherlands and Belgium, a maximum of 25 km/h applies; in other countries, the rules of that country apply.

You tune a QMWheel S20 or S20 Pro with the tunable H6C display and a tunable controller in the colour of your motor plug. You always need both. According to the product data, the S20 can then be tuned up to 45 km/h (up to 32 km/h with the black motor plug controller), only for use on private or enclosed property.

Which display and which controller

The H6C display has a 5-pin plug. If your current display has NFC, choose the H6C display tunable (with or without NFC) in the With NFC variant.

Which plug colour do you have?

Look at the plug in the motor cable: the cable that runs from the motor in the rear wheel to the controller. If that plug is red, choose a controller with a red motor plug; if it is black, choose a controller with a black motor plug. A controller with the wrong colour will not work on your bike. In the selection guide you can see which part fits each model.

What is in the box?

• Display: the H6C display with two small screws, nuts and rubber pads for mounting.
• Controller: the controller, in compact packaging.
• If you order an S20 Pro from the tunable fatbikes in the Tunable version, the controller and the H6C display are already included.

Installation in outline

• Switch the bike off and remove the battery.
• Display: disconnect the 5-pin plug, unscrew the clamp on the handlebar and fit the new display in the same place. Push the plug in straight and without force, so the pins do not bend.
• Controller: remove the saddle first, then you can easily reach the controller. Take a photo of the old connections and reconnect the 5 cables in the same order.
• Then set up the display according to the instructions with the product.

Frequently asked questions

Do I need a display and a controller for the S20?

Yes. Tuning an S20 or S20 Pro always requires the tunable H6C display and a tunable controller together.

Which controller fits my S20 Pro?

With a red motor plug, the S20 Pro controller or the V20/V20 Pro/S20 controller. With a black plug, the controller with a black motor plug.

Does the H6C display fit the S20?

Yes. According to our product data, the tunable H6C display with a 5-pin plug fits the S20 and the S20 Pro.

Are the parts already included with a tunable S20 Pro?

Yes. The Tunable version already includes the controller and the H6C display.

How quickly will I receive the parts?

Order before 23:59, delivered tomorrow. Shipping within the Netherlands costs €7.95 and is free from €150.

All separate tuning parts are in the tuning kits.

Not sure which part fits? Message us on WhatsApp at +31 6 82090642 or email info@fatbikeklaar.nl, preferably with a photo of your motor plug and your current display.

Last checked: 3 October 2026.