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Speedbox 1.4 For Bosch Sx (Smart System + Rim Magn)

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SIMPLIFIED INSTALLATION
No need to find a suitable position for the Magnet Simulator

DESIGNED FOR:
Performance Line SX motors of 4. Gen
(Motor Models BDU3142)
(Motor Models BDU3143)
Mounted with 2 top screws

PROPERTIES:
Maximum speed: Unlimited (max 35 km/h recommended)
Display shows:
Real speed: NO
Correct travelled distance: After the countdown process is finished
Activation/deactivation (do not perform while riding):
WALK function
- + - +
Indication of tuning activation/deactivation: YES (3.5/2.5 km/h)

Compatible with:
Power Line SX motors of 4. Gen (Models BDU3142, BDU3143)
E-bikes that have a magnet attached to a valve (Bosch Rim Magnet)
Not compatible with:
Standard magnet
ABS system
SpeedBox App

Please check your e-bike type and motor space before purchasing the product

SpeedBox 1.4 Tuning Chip for Bosch Performance Line SX (Gen4) + Smart System
Unlock the full potential of your Bosch-powered e-bike with the SpeedBox 1.4, designed specifically for Performance Line SX motors (BDU3142, BDU3143) equipped with the Smart System and Rim Magnet. This third-generation tuning chip removes the factory speed limiter, allowing for enhanced performance while maintaining a clean and simplified installation—no magnet simulator required.

Functionality
SpeedBox 1.4 enables your e-bike to suppress the 25 km/h speed limit, allowing speeds up to 35 km/h or higher. While the chip allows for unlimited speed settings (up to 99 km/h), we strongly recommend not exceeding 35 km/h to minimize the risk of error codes and ensure safe operation.

After installation, your e-bike display will not show real-time speed during the ride. However, accurate distance and ride data will be displayed after the post-ride countdown process is complete.

If you prefer to see real-time speed and ride metrics during your ride, consider upgrading to SpeedBox 1.4 B.Tuning, which connects to the SpeedBox App for live data on your phone.

Activation & Speed Settings
Activate or deactivate tuning only when the bike is stationary—never while riding.

Activation methods:

Hold the “-” button to engage WALK assist. Display will show 3.5 km/h, indicating tuning is active.

To deactivate, repeat the process. Display will show 2.5 km/h, and the limiter will reset to 25 km/h.

For bikes without WALK assist enabled, use the - + - + button combination to toggle tuning.

Speed customization:

Switch modes from TURBO down three levels, then back up: eMTB → TOUR+ → ECO → TOUR+ → eMTB → TURBO

Speed limit indicators:

2.5 km/h = 25 km/h

3.0 km/h = 30 km/h

3.5 km/h = 35 km/h

The last displayed limit is saved after 15 seconds of inactivity.

Post-Ride Protocol
After each ride:

Leave the bike powered on until 0.0 km/h is displayed.

Do not remove the display until the countdown process is complete.

For short stops, keep one foot on the pedal to prevent countdown initiation.

For longer stops, allow at least a partial countdown.

After extended rides, the countdown may take several minutes.

Installation
SpeedBox 1.4 uses original connectors for secure and straightforward installation. Connect male and female connectors in the direction of the lock—do not rotate during connection. Detailed instructions and video guides are available, and disassembly is just as simple.

For new bikes, ride at least 10 km before activating the tuning.

Compatibility
Compatible with:

Bosch Performance Line SX motors (BDU3142, BDU3143)

E-bikes using Bosch Rim Magnet (mounted on valve)

Not compatible with:

Standard magnet setups

ABS systems

SpeedBox App (unless using B.Tuning version)

Please verify your motor type and magnet configuration before purchase

Important Safety & Legal Warning:

  • Performance Modification: The SpeedBox tuning chip is designed to update and modify your e-bike’s performance settings—altering speed limits and acceleration curves from the original factory configuration.
  • Firmware Updates Risk: Important: Updating your bike’s firmware while the chip is installed can potentially render the chip inoperable. The update process may conflict with the chip’s modified settings, which could permanently “kill” the chip. To avoid this, always remove the chip or consult with a qualified technician before performing any firmware updates.
  • Warranty Notice: The installation or use of this product may void your e-bike manufacturer’s warranty.
  • Legal Compliance: Using a modified e-bike on public roads, cycling paths, or any area regulated by local laws may be illegal. It is your responsibility to ensure compliance with all applicable laws and regulations in your locality.
  • User Responsibility: By purchasing and installing the SpeedBox tuning chip, you acknowledge that you assume full responsibility for any modifications to your e-bike’s performance. We are not liable for any legal consequences, accidents, or damages that may result.
  • Professional Installation Recommended: For ensuring safety and optimal performance, this device should only be installed by a qualified technician. Confirm that your bike remains compliant with local safety and traffic laws after installation.

SPEEDBOX

Boost your e-bike’s performance with Speedbox tuning kits, available at Hyper Ride for riders looking to unlock their bike’s full potential. Our selection includes Speedbox 1.0, 2.0, and B-Tuning kits, designed to remove speed restrictions and enhance your electric bike’s capabilities. These kits are easy to install and compatible with various e-bike motors, providing increased speed and power for an exhilarating ride. At Hyper Ride, we offer Speedbox products with fast and reliable delivery across New Zealand, so you can enhance your biking experience without waiting. Shop Speedbox tuning kits today and enjoy the freedom of unrestricted riding, whether you’re commuting or hitting the trails. Experience the thrill of a faster, more powerful e-bike with Speedbox from Hyper Ride.

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