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

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

SpeedBox 1.4 for Bosch SX Smart System Rim Magnet – Power and Freedom for Your E-Bike

The SpeedBox 1.4 for Bosch SX Smart System and Rim Magnet is a state-of-the-art tuning kit that removes the 25 km/h speed limit from Bosch-powered e-bikes, allowing speeds of up to 35 km/h. This model is specifically designed for Bosch Smart System SX motors and "Rim Magnet" sensors. Installation is user-friendly, and activation is easily done using the WALK function on your bike’s controller. With the tuning, you can experience your e-bike’s full power without limitations. Please pay attention to the motor screw mounting points—see the pictures!

Make your e-biking limitless!

Features:

Maximum speed: No limit (recommended up to 35 km/h)

The display shows:

• Actual speed: NO
• Correct distance traveled: YES (when the calculation process is complete)

Activation/deactivation (do not perform while riding):

• Via WALK function or by pressing - + - + buttons

Tuning activation/deactivation indicated: YES (3.5/2.5 km/h)

Compatible with:

• Smart System displays
• Bosch Power Line SX Motors Gen4 (Models BDU3142, BDU3143)
• E-bikes with a rim-mounted magnet (Bosch Rim Magnet)
• The latest Bosch software version

Not compatible with:

• Standard magnets
• ABS systems
• SpeedBox app

Notes:

• If you are installing the SpeedBox on a new bike, ride at least 10 km before installing the box.
• Please check your e-bike's exact model and motor condition before ordering.
• Compatible only with e-bikes that have a rim-mounted magnet (Bosch Rim Magnet) and Bosch Power Line SX Motors Gen4 (Models BDU3142, BDU3143)

Warning:

Please note that using converted e-bikes like this on public roads may be illegal. The manufacturer and retailer accept no responsibility for damages caused by the use of SpeedBox products. E-bikes equipped with SpeedBox products must not be used on public roads, bike paths, or in public areas. E-bikes with SpeedBox products are only to be used on private property, and entirely at your own risk. Using SpeedBox products may void your bike’s warranty. We strongly recommend using additional safety features and protective gear to prevent injuries.

• We recommend not updating your e-bike’s firmware. Updates increase the risk of detecting the tuning.
• Disable automatic updates in the eBike Flow app.
• Please note: the SpeedBox product warranty does not cover malfunctions caused by a motor update.
• For brief stops, to continue riding smoothly, keep one foot on the pedal to prevent the countdown from starting.
• When stopping for a longer period, allow at least a partial countdown to complete.
• After a long ride, the countdown may take several minutes.
• Do not remove the display if the countdown has not finished.
• Activate/deactivate tuning before riding (when the e-bike is stationary), not while riding.
• We recommend not exceeding a speed of 35 km/h.

Please note that for unlocked electrical parts (including Speedbox, Speedfun, and Peartune products), there is no 14-day return or exchange policy. Non-functioning Speedbox, Speedfun, and Peartune products covered under warranty will always be sent to the manufacturer for service. Read the warranty terms here.