SpeedBox 1.0 for Impulse 2.0 – E-Bike Tuning Chip, Speed Limit Up to 50 km/h

The SpeedBox 1.0 for Impulse 2.0 is a tuning chip built for e-bikes running the Impulse 2.0 mid-drive motor. Once activated, it doubles the assistance cut-off speed from the factory 25 km/h to roughly 50 km/h. The module fits the Impulse 2.0 wiring harness directly, so no complex modification is needed.

Control happens entirely without an app. A green or red wire slots into the supplied connector and sets the mode. Therefore you never depend on Bluetooth, a smartphone, or a firmware version to switch between settings. The swap takes seconds.

Importantly, this module does not raise motor output and does not alter the motor mechanically. It changes only the speed at which electric assistance stops. While the chip is active, the display shows roughly half of your real speed. At 40 km/h, for example, the screen reads about 20 km/h. Odometer and trip data follow the same reduced figure. That behaviour is characteristic of the 1.0 version, not a fault.

Key Benefits

• Assistance up to ~50 km/h – electric support keeps pulling twice as far past the standard 25 km/h ceiling.
• Wire-based control – the green wire switches tuning on, while the red wire restores factory settings.
• No app required – operation needs no Bluetooth connection and no smartphone.
• Instant mode change – swap the wire in the connector and the mode changes immediately.
• Plug-in installation – the module integrates into the existing Impulse 2.0 wiring loom.
• Colour-coded connectors – marked plugs are visible during fitting, which keeps installation straightforward.
• Fully reversible – the SpeedBox can be removed again, for instance before a firmware update.
• Works with the stock system – controller and display stay original; only the displayed speed changes.

Who Is This For?

This SpeedBox 1.0 model is made for electric bikes fitted with the Impulse 2.0 mid-drive motor. That drive system was developed by Derby Cycle and appears in Kalkhoff, Focus and Rixe electric bikes. If your bike carries one of those badges with an Impulse 2.0 unit, this is the matching module.

The chip suits riders who want a simple switch between the 50 km/h and 25 km/h modes. Because setup involves no menus and no pairing, it appeals to owners who prefer hardware over software. Riders who dislike app-dependent tuning tend to choose this version.

Note that this model is not compatible with the SpeedBox App. It is built specifically for the Impulse 2.0 drive. For other Impulse versions, get in touch and we will confirm compatibility. The module is intended for off-road use or riding on closed private tracks.

How the SpeedBox 1.0 for Impulse 2.0 Works

• Activation – insert the green wire into the SpeedBox 1.0 connector; assistance then runs up to ~50 km/h.
• Deactivation – insert the red wire into the same connector; the factory 25 km/h limit returns.
• Display reading – with the chip active, the screen shows half of the actual speed.

Installation

• Disconnect the bike from its power supply.
• Connect the SpeedBox 1.0 to the designated Impulse 2.0 socket.
• Fit the green or red wire according to the mode you want.
• Follow electrostatic discharge (ESD) precautions and the manufacturer’s safety guidance while working.
• On a brand-new bike, ride at least 10 km before activating the module.
• Avoid updating bike firmware with the module installed. Remove the SpeedBox first, run the update, then refit it.

Technical Specifications

Why Choose This Module?

This is the entry-level version of the SpeedBox range, built without an app and without Bluetooth. Consequently, its behaviour never depends on your phone or on a software release. You switch modes with a physical wire and see the result straight away.

The module leaves the motor construction untouched and works alongside the original controller and display. Because installation is plug-in, removal is equally quick. That reversibility matters when a service visit or a firmware update is due.

Frequently Asked Questions

Which motor does the SpeedBox 1.0 for Impulse 2.0 fit?

• It fits e-bikes with the Impulse 2.0 mid-drive motor.
• This drive appears in Kalkhoff, Focus and Rixe models from Derby Cycle.

Does it work with other Impulse versions?

• This model is designed specifically for the Impulse 2.0 drive.
• For a different Impulse version, contact us and we will check compatibility.

Why does my display show half the real speed?

• With the chip active, the speedometer reads roughly ½ of your actual speed.
• Odometer and trip figures follow the same reduced value.
• This is how the 1.0 version operates and is not a malfunction.

How do I switch tuning on and off?

• Insert the green wire into the connector to enable assistance up to ~50 km/h.
• Insert the red wire to restore the 25 km/h factory limit.

Do I need an app or Bluetooth?

• No. Operation is wire-based and requires no smartphone.
• This model is not compatible with the SpeedBox App.

Does the chip increase motor power?

• No. It does not raise power output or modify the motor mechanically.
• It changes only the speed at which assistance is cut off.

Can I remove the module later?

• Yes. The SpeedBox can be taken out at any time.
• Remove it before a firmware update, then refit it afterwards.

Anything to know before first activation?

• On a new bike, ride at least 10 km before activating the module.
• Disconnect power and observe ESD precautions during fitting.

The SpeedBox 1.0 for Impulse 2.0 gives Kalkhoff, Focus and Rixe owners a straightforward way to move between the 25 km/h and ~50 km/h assistance modes. Controller and display remain original, installation is plug-in, and the change is reversible whenever you need the stock setup back. Use it off-road or on closed private tracks.