Speedbox 3.1 Specialized speed increasing device

Unleash the full potential of your Specialized e-bike with the SpeedBox 3.1! This third-generation tuning chip allows you to freely set your own speed limit, removing factory restrictions. After a simple installation, your display shows real values like maximum speed, average speed, and range. Easily activate the tuning and adjust your max assistance speed using your bike´s existing controls. Fully compatible with Specialized e-bikes, including SL motors and TCU/MasterMind units. Experience unrestricted performance on private property