SpeedBox 1.1 B.Tuning – the next generation Bluetooth tuning chip for Bosch Gen4 with Smart System engines. It removes the 25 km/h limiter , allows you to set your preferred assistance limit (recommended up to 35 km/h due to the risk of errors) and displays the correct speed/distance data in the SpeedBox app on your phone.
Key benefits
- Real data on your phone: speed, mileage, average/max speed – SpeedBox App.
- Quick ON/OFF: activate WALK (by holding “-“) or – + – + (without WALK).
- Selectable limit: default ~35 km/h, can be changed up to 99 km/h*
- Original connectors: clean plug-and-play installation into the E-Bike Smart System.
* Exceeding 35 km/h increases the risk of error codes – use responsibly.
Compatibility
- Engines: Bosch Gen4 with Smart System (e.g. Performance Line CX Smart System, etc.).
- Displays/controls: smart system environment with WALK function (or – + – +).
- Connectivity: Bluetooth (SpeedBox App: Android/iOS).
How it works
- First activation after installation: go to the menu and set the perimeter of the wheel – this is necessary for all functions to work.
- Activation (when the bike is stationary): briefly activate WALK (hold “-“) → display 3.5 km/h → chip ACTIVE (assist ~35 km/h, limit changeable).
- Switching off: briefly WALK again → 2.5 km/h → returns to 25 km/h. OEM mode.
- Without WALK: on/off – + – + combination.
- Limit change: TURBO → eMTB → TOUR+ → ECO → TOUR+ → eMTB → TURBO, then briefly WALK or turn the rear wheel 360°.
Displayed value = limit: 2.5 = 25 km/h, 3. 0 = 30 km/h, 3.5 = 35 km/h, … 9.9 = 99 km/h.
Stored after ~15 s of inaction.
App (SpeedBox App)
- Live data: actual speed, mileage, average/max speed, session statistics.
- Bluetooth pairing: fast connection, simple settings.
- Note: Accurate readings above 25 km/h are visible in the app.
Installation and use
- Original SpeedBox connectors – connect without twisting the plugs (in the direction of the lock).
- If your bike is brand new, ride ≥10 km before activating the chip.
- After the ride: leave the bike on until the display reads 0.0 km/h and the countdown is over before switching off. Do not remove the display before the end.
Important (right and guarantee)
- Changing the speed limiter is forbidden in public traffic in many places – use it on off-road/private tracks in accordance with local regulations.
- Tuning may affect the manufacturer’s warranty.
- High speeds require the right brakes, tyres and skills.
Specifications
- Model: SpeedBox 1.1 B.Tuning (Bosch Gen4 Smart System)
- Bluetooth (SpeedBox App)
- ON/OFF: WALK (3.5 km/h = ON; 2.5 km/h = OFF) or – + – +
- Limit: recommended ~35 km/h (up to 99 km/h possible)
- Requirements: correct determination of the circumference of the wheel after installation
FAQ
Can I see the exact speed above 25 km/h?
Yes – the SpeedBox App on your phone shows real data.
Can I set >to 35 km/h?
It is possible, but not recommended, as it increases the likelihood of system errors.
If I don’t have WALK?
Use the – + – + combination to activate/deactivate.
Warning
Please note that the use of this type of modified electric bicycle on public roads may be against the law in some countries. The manufacturer and the seller accept no liability for damage caused by the use of SpeedBox products. “Use of SpeedBox may void your ebike warranty.
We recommend that you do not update the software on your electric bike. Updating increases the risk of debug detection.
After a short stop, we recommend keeping one foot on the pedal to keep you going smoothly, to avoid starting a countdown.
If you stop for a longer period of time, allow at least a partial countdown to take place.
After a long drive, the countdown can take several minutes.
Do not remove the display if the countdown has not finished.
Activate/deactivate the chip before riding (when the e-bike is stationary), not while riding.
We recommend that you do not exceed a speed of 35 km/h.
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