PearTune MSO 4.0 for Bosch Smart System with crank puller & holder

TYPE: Bosch Smart System

VENDOR: PearTune

249,00 €

Payment & Shipment
Customer reviews

PearTune MSO 4.0 for Bosch Gen4 Smart System 2022 with crank puller and smartphone holder

The PearTune MSO 4.0 removes the 25 km/h speed limit of Bosch Smart System e-bikes, so you can ride much faster with full motor support. By the way, "MSO" stands for nothing other than "Max Speed Off".

You don't need a PC or smartphone to operate the tuning. You can switch the tuning on and off at any time using the control buttons on your bike.

In contrast to PearTune 3.0, PearTune 4.0 has a number of advantages that make this tuning tool even more attractive. For example, the service menu gives you the option of:

Set the maximum supported speed to an individual value using the control buttons of the e-bike.

Set an individual activation code.

Use the "chip lock" function. This allows you to make the tuning module virtually "invisible" to outsiders. In this case, the e-bike functions normally and the tuning cannot be activated temporarily.

Correct speed remains readable

If the Tuning Chip has been activated, your e-bike display will show the correct speed up to 22.9 km/h. At higher values, the correct speed remains readable, albeit via the second digit and the decimal place. At higher values, the correct speed remains readable, albeit via the second digit and the decimal place of the speed display. This means that a displayed speed of 23.3 km/h would in reality correspond to 33 km/h, a display of 24.0 km/h would correspond to 40 km/h etc.

All other values are shown correctly on the e-bike display.


The PearTune MSO 4.0 is a module that must be installed between the engine and the speed sensor and between the engine and the speedometer (display). To gain access to the required plug connections, the plastic cover of the motor must be removed briefly during installation.

Note: The bundle includes a crank puller and a smartphone holder.

Important: If you want to use the PearTune module on a brand new e-bike, you should first ride the bike for at least 1 km before installing the tuning.

PearTune MSO 4.0 for Bosch Gen4 Smart System 2022 - Functions at a Glance

Removal of the speed limit.

Maximum speed individually adjustable: For the first time, the level of maximum motor support can be individually set with the + and - buttons, in 1 km/h increments.

Correct speed remains legible in the display, albeit (from 22.9 km/h) via the second digit and the decimal place.

Chip lock ("Lock the Chip" function): A feature with which the tuning module can be made "invisible". If the chip lock is activated using the + and - buttons on the control element, the tuning chip is locked in the software so that no one can see that a tuning tool has been installed on the e-bike. This means that the e-bike and display function normally and the tuning can no longer be activated. The chip lock can only be deactivated later, again with a specific + and - key combination.

Tuning can be activated / deactivated: You can activate and deactivate the tuning as you wish with the + & - buttons on your e-bike (++-- or +-+- or --++ or -+-+). The display shows you whether the tuning has been activated or deactivated (short display of approx. 19.0 km/h = tuning active / short display of approx. 12 km/h = tuning deactivated).

Individual activation code: PearTune 4.0 offers the possibility to set an individual activation code via the service menu - e.g. by pressing the light button once or twice for a long time.

Tuning status when switching on: With PearTune 4.0, you can set whether the tuning should automatically be ON or OFF when the e-bike is switched on.

Chip reset: If you want to replace the speed sensor or use the tuning chip on another e-bike, you can reset the chip. When resetting, you can restore the factory settings or alternatively keep the chip settings.
It is possible to switch between the NORMAL version and the STILL ON version (with the STILL ON version, the tuning is always active as soon as the e-bike is switched on).

The PearTune module does not need its own battery.

Plug & Play: The module configures itself after installation.

Small & light: The module is very small and therefore easy to install. The weight of the tuning parts is just 10 - 18 g.

Waterproof original plugs for connection to the engine and moisture-protected PearTune plugs for connection to the display and speed sensor ensure a secure connection.

PearTune MSO 4.0 for Bosch Gen4 Smart System 2022- Compatibility

  • Bosch Smart System e-bikes with mid-mounted motors from year 2022 onwards (also referred to as "Bosch BES3")

Not compatible with Bosch Smart System e-bikes with magnet on the valve!

Not compatible with Bosch Smart System e-bikes with ABS system!

Also compatible with the latest software upgrades from the manufacturer (as of July 2022).

Attention: Please do not have Bosch updates carried out after installing and using a tuning! The compatibility may no longer be given afterwards!

Important: Not compatible with e-bikes that have a solenoid / magnet on the valve. These sensors are installed deep in the motor and cannot be optimised by modules.

Payment & Shipment

Delivery time, Shipping costs, Minimum order value und Payment methods:

Delivery time

Delivery time is 1-8 business days within Germany. Postal delivery time outside Germany may take longer.

Shipping area

We ship to Belgium, Bulgaria, Denmark, Estonia, Finland, Germany, Greece, Ireland, Iceland, Italy, Croatia, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Austria, Poland, Portugal, Romania, Sweden, Slovakia, Slovenia, Spain, Czech Republic, Hungary, Cyprus.

For shipping to Germany please use our german shop.

For a solution to Switzerland and Liechtenstein please see here.

We do not ship to the USA, France, Canada (including all overseas territories) and generally outside the EU.

Shipping costs

The shipping costs for Germany are 3,50 Euro. The shipping costs are waived from an order value of 180 Euro. For countries within the EU the shipping costs are 9,90 Euro. The shipping costs are waived from an order value of 300 Euro. We ask you to cover the cost of any return shipment yourself. Please note that customs fees may apply in third countries outside the European Union.

Minimum order value

The minimum order value is 25 Euro. Only from this amount you can use prepayment or PayPal and bank transfer as payment methods.

Maximum order value

The maximum order value for orders outside the EU is 1.000 Euro. The maximum order value within the EU is 12.500 Euro.

Payment in advance bank transfer

Please transfer the total amount with your order number to our account which you received in the confirmation email. Please note that bank transfers within Germany can take up to three working days. Transfers from abroad, especially from Austria and Switzerland, usually arrive very quickly. From other countries, transfers can take a little longer on average.

Payment in advance Paypal

At the end of the order process you will be redirected to the page of Paypal. There you can initiate your payment. As soon as the Paypal transaction is completed, the status of your order will change in the store. The goods will then be shipped as soon as possible.


Comparison of e-bike tuning products




Badass Box

RedPed / BluePed /






Sx2 Dongle


Software (Module)
Box Module Module Module Module (Kit)
Module /
Module /
Range of functions ***** ***** * ***** **** *** *** *** *** / ** *

Easy installation of the tuning

***** ***** **** ** ** ** ** ** / * ** / * *

Invisible after installation

***** ***** * ***** ***** ***** ***** ***** ***** / **** ****

Switching on / off while riding

Gerät, Display
App, Display
(App), Display
Display, Magnet
***** / ****
Display /
Dongle, (Licht)

No more tuning Module at the bike

***** ***** ***** * * * * * * / **** ****

Invisible dismantling

***** ***** ***** ***** ***** ***** ***** ***** ***** / *** ***

Easy dismantling

***** ***** ***** ** ** ** ** ** / * ** / * *

Correct display of km/h

* *****
Display, App
Display, App
* ****


***** ***** ***** ***** ***** ***** ***** ***** ***** *****


* ***** * ***** ***** ***** ***** * * *

Price range in euros

169 to
189 to 299 149 to 154 219 to
159 to 179 139 to
139 to
89 to
89 to
139 to


Customer reviews

Important: Tuning measures on e-bikes and e-scooters mean that they are no longer permitted for use on public roads. Legally permissible use is therefore only possible on private property or - if permitted - in competitions. Driving an e-bike or e-scooter modified by tuning measures on public roads can lead to criminal liability for driving without a license as well as driving without insurance coverage. Tuning measures on the e-bike and e-scooter can lead to a loss of warranty rights and manufacturer warranties. In addition, tuning measures can lead to a loss of insurance coverage and accident victim assistance benefits in the event of accidents. The e-bike (or e-scooter) modified by tuning measures is exposed to an additional load due to the higher speed, which can lead to safety risks.

PearTune MSO 4.0 for Bosch Smart System with crank puller & holder

PearTune MSO 4.0 for Bosch Smart System with crank puller & holder

249,00 €