SpeedBox 3.2 B. Tuning for Specialized Gen4 3.1 Motor

SpeedBox 3.2 B.Tuning brings a unique connection between your e-bike and smartphone. Optimized for performance and ultimate riding enjoyment, it removes the speed limit from your e-bike and unlocks unlimited riding. With the SpeedBox App, you can track and record all your ride parameters directly on your phone’s display — anytime, anywhere.

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]

You activate the tuning by pressing the WALK button or using the button combination - + - +. The value 35.1 km/h will briefly appear on the display, indicating the preset maximum speed of 35 km/h.

You deactivate the tuning in the same way. The value 25 km/h will appear on the display and the e-bike will then work the same as before installing the tuning.

You can change the maximum assist speed by switching the modes from TRAIL three levels down and then three levels up (AUTO - ECO - OFF - ECO - AUTO - TRAIL). The default maximum assist speed will appear on the display. Each time you press the WALK button or rotate the rear wheel, the maximum assist speed increases by 5 km/h. The last displayed limit will be saved after five seconds of inactivity.

Compatible with motors:
Specialized GEN 4 (3.1/S-Works)

When connecting the SpeedBox 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 chip 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 chip 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 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 Life Long warranty to all their Products!

If You have any questions, please do not hesitate to contact us. Thank you for looking! Two Wheels Empire Team

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. If your Speedbox tuning kit needs updating due to updated eBike software, please contact us at hi@twowheelsempire.com. Preliminary costs are 49£ + shipping costs.