SpeedBox 1.4 B.Tuning for Bosch SX (Smart System + Rim Magnet)

Key features

SpeedBox 1.4 B.Tuning with integrated Bluetooth is a tuning chip for e-bikes with Bosch Performance Line SX motors mounted with 2 upper screws and a rear wheel valve magnet. It removes the 25 km/h speed limit and, thanks to the SpeedBox App, offers a unique connection between your e-bike and smartphone.

Tuning control

Switch between the 25 km/h limit and unlimited mode

Easy installation

Thanks to clear instructions including a video, anyone can handle the installation

Compatibility

• Motors: Bosch Performance Line SX mounted with 2 upper screws (with Rim Magnet)

• Displays: Kiox 300, Kiox 500, Intuvia 100, Purion 200, Purion 400

• Units: LED Remote, Mini Remote, System Controller

• Not compatible with: CX motors, motors with a classic spoke magnet, ABS, Enviolo Automatiq

Technical specifications

• Maximum speed: Factory preset 35 km/h (EU) / 22 mph (US). Do not change the speed limit.

• Display shows: Values approx. 10 km/h lower than the actual speed

• 3 activation / deactivation methods: SpeedBox App / WALK function / + - + - buttons

• Custom speed limit: Adjustable

• Bluetooth: Yes

• Updates: No

• After activation, the actual speed limit for bikes with US software is approx. 28 mph. The displayed value may differ.

Installation

Installing the device is easy and intuitive. Choose the option that suits you best – a video guide, a printed manual, or a detailed step-by-step picture guide.

Video guide
You can find a detailed installation and tuning activation procedure on our YouTube channel


Recommendations for trouble-free SpeedBox operation

• Keep the e-bike turned on after each ride until the “Countdown” (distance recalculation) is completed.

• During short stops, keep one foot on the pedal to prevent the countdown from starting.

• During longer stops, allow at least part of the countdown process to complete.

• Do not disconnect the display before the countdown is finished.

• Do not perform software updates – disable automatic updates.

• Always activate/deactivate tuning before or after the ride, not during.

• Do not increase the set maximum speed of 35 km/h.

Overview of supported software versions:

Warning

• Rules for using derestricted e-bikes vary by country, so check local legislation before riding.

• SpeedBox is intended for off-road use only and you use it at your own risk.

• The manufacturer is not liable for damage caused by illegal or improper use.

• Installation may also void your e-bike warranty.

• For your safety, use appropriate protective gear and ride with maximum caution.