Volspeed V4 Bosch 2021 - for Bosch Gen2 / Gen3 / Gen4 2014-2023 (not Bosch Smart System)

A smart Tuning Kit Volspeed V4 with an option to set a speed limit of an e-bike of your own choice. After the chip is installed, your e-bike’s display will show real data, such as maximum and average speeds, daily mileage and cruising range. In contrast to the almost complete elimination of the speed limit with other tuning modules, this module still allows a very sporty riding style with moderate battery consumption by slightly increasing the limit, e.g. to 20 mph (32km/h). For a more natural riding experience, the dynamic mode spreads the downshift over a wider speed range, the so-called "wall effect" is significantly reduced.

The tuning kit manipulates the speed signal without altering the motor's power relative to pedaling speed. This guarantees a smooth motor control without speed limit interruptions. Depending on a tuning kit, some determine when assistance stops, while others remove the restriction entirely for continuous support. However, the achievable speed mostly depends on the eBike model. Achievable speed can be calculated using a simple formula:

Speed = Cadence [rpm] * Wheel circumference [mm] * Front Chainring Teeth / Rear Chainring Teeth * 60 [min/h] / 1.000.000 [mm/km]

The tuning kit can be activated directly on your bike’s display. After pressing the ' - ' button and holding it for 3 seconds. After Tuning kit activation speed limit is displayed for 5 seconds. If you would like to change maximumm speed, just press 'Plus' or 'Minus' keys. Possible values: 16... 28mph (25... 45 km/h). Default value: 20mph (32 km/h). The set value is saved.

To deactivate the tuning kit, press the ' - ' button and hold it for 3 seconds again.

The tuning is always switched off after switching on the bike.

It is possible to set a "softer curtailment behavior" (dynamic mode). This significantly softens the otherwise very abrupt deceleration at the speed limit. Correct display of the speed, the distance covered and the average speed at all times.

This tuning kit is compatible with all eBikes; eMTB; eMountainBikes that have a Bosch Motor manufactured from 2014-2023. Including all Active Line, Active Line Plus, Cargo Line, Performance Line, Performance Line Speed, Performance Line CX models including motors of the 4th generation.

Compatible with displays:
- KIOX
- INTUVIA
- NYON
- PURION
- COBI

Compatible with motors (incl. Gen4):
- Active Line Plus
- Performance Line
- Performance Line CX Line
- Performance Line Speed
- Cargo Line

Compatibility table


The tuning module only works with e-bikes that have an electric motor support of up to 16mph (25km/h) ex works. Children's e-bikes with a support up to 12mph (20km/h) and Speed-e-bikes with a support up to 28mph (45km/h) are not supported.

Not compatible with:
- Bosch Smart System, you would need Volspeed Bosch Smart system.

When connecting Tuning Kit to an e-bike you will find connectors colored to make installation very simple. We have prepared detailed instructions and videos to make installation easy for you. Disassembly of our tuning kit is just as easy. If you have any troubles with installation or disassembly, do not hesitate to contact us. If you are planning to install Volspeed on a brand-new bike, make sure you ride it for at least 0.6 miles (1 km) before the tuning kit is activated.

Installation Guide:

Please note that the operation of this type of modified electric bikes on public roads may be against the law in some countries. The manufacturer takes no responsibility for damages resulting from the use VOLspeed products. Electric bikes equipped with VOLspeed products are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with VOLspeed products can be used exclusively on private property and entirely at one’s own risk. The use of VOLspeed may void the warranty of your ebike.

We strongly recommend using other safety features and protective gear to prevent injuries in higher speeds.
VOLspeed Products are thoroughly tested and we stand by their quality. VOLspeed provide 2 years warranty to all their Products!

Warranty does not cover damage resulting from eBike software updates. Remove the tuning kit before updating the software. Check with us first to ensure the kit is compatible with your updated eBike. We cannot guarantee that the kit will function the same after updates. Please exercise caution.