SpeedBox 1.2 B.Tuning for Bosch (Smart System + Rim Magnet)

Tuning module for the Bosch Smart System with Rim Magnet. Compatible with all Bosch drive systems that are equipped with the Smart System and Rim Magnet whose motor support ends at 25km/h (15.5mph) from the factory. Does not work with ABS system and normal spoke magnet bikes.

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]

This tuning is very easy to control. You will activate SpeedBox 1.2 B.Tuning via mobile app or directly on your e-bike’s control unit by activating the WALK assist function shortly (holding down the “-” button). Your e-bike display will show a value of 3.5 km/h (2.2 mph) and from now on you will be able to ride up to 35 km/h or more.

To deactivate the tuning, activate the WALK assist function shortly again (by holding down the “-” button). Your e-bike display will show a value of 2.5 km/h (1.6 mph) and the speed limit will be reset to 25 km/h. Your e-bike will then work the same as before the tuning installation.

SpeedBox was also designed for e-bikes that do not have the WALK assist function enabled, or activated. In this case, you can activate/deactivate tuning by switching between two assistance modes twice, i.e. by pressing the - + - + buttons.

Activate/deactivate the tuning before the ride (when the e-bike is standing still), not during riding!

When you first open the SpeedBox App, you will be asked to type in a new PIN. This PIN will be requested each time you open the SpeedBox App. After confirming the PIN, you will be asked to set a service password. Your service password will be used in case you forget the PIN or want to change it.

You can set the maximum speed limit by switching the modes from TURBO mode three levels down and then three levels up: eMTB - TOUR+ - ECO - TOUR+ - eMTB - TURBO. An actual speed limit will be displayed after that. The maximum speed of an electric assistance can be switched by activating WALK assist function shortly or by turning the rear wheel 360°. The value of 2.5 km/h on the display corresponds with the limit of 25 km/h, 3.0 corresponds with 30 km/h, 3.5 corresponds with 35 km/h etc. The last displayed limit will be saved after 15 seconds of inactivity.

After finishing the ride, leave the e-bike on for a while until the SpeedBox finishes the "countdown" process (the riding time will continue on the display until it stops and shows the correct distance travelled) to prevent tuning detection on your e-bike.

This tuning kit is compatible with Bosch Smart System with Rim Magnet with the drive unit software versions up to 5.17. Not compatible with with e-bikes with Bosch ABS system and regular spoke magnets.

When connecting Tuning Kit to an e-bike you will find connectors colored to make installation very simple. We have prepared detailed instructions 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 Speedbox on a brand-new bike, make sure you ride it for at least 0.6 miles (1 km) before the tuning kit is activated. Also, please refer to the magnet simulator image when installing this tuning kit

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 Speedbox products. Electric bikes equipped with Speedbox products are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with Speedbox products can be used exclusively on private property and entirely at one’s own risk. The use of Speedbox may void the warranty of your ebike.

We strongly recommend using other safety features and protective gear to prevent injuries in higher speeds.
Speedbox Products are thoroughly tested and we stand by their quality. Speedbox 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.