SpeedBox 1.5 for Bosch Performance Line SX Gen4 - E-bike Tuning Kit

Get the most out of your e-bike - increase speed limit easily and safely

SpeedBox 1.5 for Bosch is the perfect solution for riders who want to remove the speed limitation on their e-bike with Bosch Performance Line SX motor (4th generation). With this tuning kit, you can ride up to 35 km/h instead of the standard 25 km/h.

What problem does SpeedBox solve?

Many e-bike riders feel restricted by the legal speed limit of 25 km/h. Once you build up speed, it feels natural to continue accelerating, but the motor stops assisting at 25 km/h. SpeedBox 1.5 solves this by allowing you to adjust the speed limit according to your needs.

Who needs this product?

• Enthusiasts who want more performance from their e-bike
• Commuters who want to get to their destination faster on longer routes
• Sport cyclists who use e-bikes for training
• Mountain bikers who need extra power in hilly terrain
• E-bike owners with Bosch Performance Line SX Gen4 motors

Simple installation without complicated positioning

Unlike magnet simulators, SpeedBox 1.5 doesn't require special positioning. It mounts easily with 2 diagonal screws directly on the motor. Installation is done with original connectors that guarantee perfect fit.

Technical specifications

How does SpeedBox 1.5 work?

Activating tuning

• Hold the "-" button to activate WALK function
• Display shows 3.5 km/h = tuning is activated
• Now you can ride up to 35 km/h with motor assistance

Deactivating tuning

• Hold the "-" button again for WALK function
• Display shows 2.5 km/h = tuning is deactivated
• Bike works as normal (25 km/h limit)

Benefits of SpeedBox 1.5

• Easy installation - No complicated adjustments
• Original connectors - Perfect fit guaranteed
• Reversible - Easy to remove without traces
• Safe - Built-in protection features
• Flexible - Activate/deactivate anytime
• Adjustable speed limit - Set your own maximum speed

Comparison with other brands

Similar products on the market include PearTune and Bikespeed, but SpeedBox 1.5 offers several advantages:

• Easier installation than magnet simulators
• Better compatibility with latest Bosch software
• Clearer activation/deactivation with visual feedback
• More stable performance without risk of error codes

Important safety instructions

• Only activate/deactivate when bike is stationary
• Keep bike on after riding until 0.0 km/h is displayed
• Ride at least 10 km before installation on new bike
• Recommended maximum speed is 35 km/h
• Check compatibility before purchase

Frequently Asked Questions (FAQ)

Is SpeedBox 1.5 compatible with my bike?

The product is compatible with Bosch Performance Line SX Gen4 motors (models BDU3144 and BDU3145) that have rim magnet. Check your motor model before purchase.

Can I install SpeedBox myself?

Yes, installation is simple thanks to original connectors. We provide detailed instructions and videos. If you have difficulties, please contact us.

Does SpeedBox affect my bike warranty?

Tuning may affect warranty. Contact your dealer for more information. SpeedBox is completely reversible without traces.

Does SpeedBox work with the SpeedBox app?

No, this version is not compatible with the SpeedBox app. For app functionality, choose SpeedBox 1.5 B.Tuning.

What if I get error codes?

Stick to recommended speed limits (max 35 km/h) to minimize risk of error codes. Contact us if problems occur.

Can I use SpeedBox on all surfaces?

Yes, SpeedBox works on all surfaces. Remember that higher speeds require greater attention and caution.

Note: This product is intended for use where it is legal. Check local regulations and use the product responsibly.