SpeedBox 3.1 for Specialized

The SpeedBox 3.1 for Specialized is a tuning chip designed to remove the factory speed limiter on compatible Specialized e-bikes while retaining accurate ride data on the display. It enables unlimited maximum speed, allows you to set your own assistance limit, and ensures the display continues to show real values such as maximum and average speed, daily mileage and cruising range. It is compatible with all Specialized e-bike motors, including SL models, and TCU/MasterMind TCU control units, excluding GEN 4 (3.1/S-Works), IGH electronic shifting and the SpeedBox App.

Key Features and Benefits:

• Unlimited maximum speed support: The chip disables the factory speed limiter, allowing the motor to provide assistance beyond the standard 25 km/h threshold. This removes artificial restrictions on assisted speed and supports higher sustained pace where legally permitted, giving you full access to the motor’s performance potential.
• Adjustable speed limit setting: You can set a custom maximum assistance speed by using a simple mode sequence and the WALK function in 5 km/h increments. This allows precise control over how much assistance you want, helping you tailor performance to riding conditions and maintain compliance where required.
• Display shows real ride data: Unlike many tuning systems, the SpeedBox 3.1 ensures the display continues to show actual values for maximum speed, average speed, daily mileage and range. This preserves accurate ride metrics, so your training data and trip information remain reliable and usable.
• Permanent activation after setup: The tuning is activated by switching the bike off and on twice, after which it remains active with a default assistance limit of 50 km/h. This removes the need for repeated activation during normal use, ensuring consistent behaviour every time you ride.
• Broad motor and TCU compatibility: The chip works with all Specialized e-bike motors, including SL systems, and both TCU and MasterMind TCU control units. This wide compatibility makes it suitable for a large range of Specialized models, simplifying selection and installation.
• Simple limit reset and removal process: You can check the current speed setting using the + - + - button combination and return the assist speed to 25 km/h before uninstalling. This structured process ensures the system can be returned to standard configuration safely and correctly.

For riders who want full control over motor assistance, consistent data accuracy is critical. The SpeedBox 3.1 delivers unrestricted assistance while maintaining correct display readings and allowing fine adjustment of the speed cap. The structured activation and setting process keeps operation predictable, and the ability to restore factory limits provides flexibility when required.

Choose the SpeedBox 3.1 for Specialized if you want unrestricted motor support, accurate ride data and adjustable speed control in one integrated solution.

Please note: Speed indication in the Specialized Mission Control app may not display correctly. If you have a TCU without a display or without a Walk function, we recommend purchasing the B.Tuning version compatible with the SpeedBox App.

Specification:

• Maximum speed: unlimited
• Speed limit setting: YES
• Display shows: actual values
• Activation: activated at all times
• Compatible with: all Specialized e-bike motors (including SL) and control units TCU/MasterMind TCU
• Not compatible with:
• SpeedBox App
• Specialized GEN 4 (3.1/S-Works)
• IGH electronic shifting