E-bike tuning for Bosch Smart System


✔ For the new Bosch Smart System (BES3)
✔ Motor support above 25 km/h
✔ Can be activated and deactivated
✔ Can also only be activated for the current ride
✔ Maximum support speed can be set
✔ Real speed can be read in modified form
✔ Not visible from the outside
✔ No risk: Try it out for 30 days with free return
✘ Not compatible with valve solenoid or ABS

available immediately

Item number: WT-Bosch-Smart-10.58 Category:


Motor assistance above 25 km/h

The tuning module ensures that the motor support of your eBike is still active at speeds above 25 km/h.

Tuning can be activated and deactivated

You can use a clever on/off sequence for your eBike to optimize the tuning

  • activate, deactivate or
  • only once for the current ride. After switching off the eBike, the tuning is then off.

The activated tuning is signaled via the speedometer when the eBike is switched on. This means you always know which mode is active.

Real speed modified readable

To ensure that the motor assistance also works above 25 km/h, a lower speed than the actual speed is displayed when tuning is activated:

Below 22 km/h, the real speed is displayed.

Above 22 km/h, mentally move the decimal point displayed in the speedometer one place to the right. The leading 2 on the far left then no longer has any function.

Example: A speed of 32 km/h is displayed as: 23.2 km/h

Kiox 300

Advantage: The verifiable average speed always remains inconspicuously below 25 km/h!

Maximum support speed adjustable

You can set the speed up to which the motor should provide assistance. This ranges from 31 to 50 km/h in steps of 1 km/h.

Once the cut-off speed has been reached, the motor assistance is gently reduced.

The speed remains visible even above the set switch-off speed.

Tip: We recommend not riding faster than 35 km/h with the new Smart motors with assistance.

Supported Bosch motors

The brand new Bosch motors with the "smart system" will be supported from 2022 (BES3). You have a smart system if one of the following control units is installed:

If one or more of the above control units or displays are installed, then this tuning module is compatible with them. There are only 2 exceptions. The tuning does not work if the eBike:

In both cases, the slot for the speed sensor is not occupied and has a dummy plug. In this case, the magnet on the spokes or on the brake disk is also missing. Please check this before purchasing.

If you have a different display to the one shown above, then the bike is most likely not a Bosch Smart System. In this case, please select this solution: E-bike tuning for Bosch motors (Gen 1 - 4)

More information

A detailed description of the range of functions and installation instructions can be found here in the instructions.

We have answered the most frequent customer queries in our Frequently Asked Questions.

Please also note the legal information on tuning!

Scope of delivery

  • Tuning module
  • Cable ties and stickers
  • Operating and installation instructions in German, English and Italian


Installation takes just a few minutes and can also be completely reversed. The tuning module is inserted between the speed sensor and the motor of your pedelec. It is not visible from the outside.

1) Remove the motor cover:

Remove battery

Remove screw with Torx 20

Pull the motor cover downwards

2) Disconnect the plug from the speed sensor:

Disconnect the speed sensor plug

The speed sensor socket has a gray-green marking (here using the example of a Performance Line CX)

3) Plug in the tuning module:

Insert the disconnected plug from the speed sensor into the socket on the Wiesel tuning module. Insert the plug from the Wiesel tuning module into the engine.

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