SpeedBox 3.1 for Specialized - Package: BAG, Qty: 100 pcs + 16 free

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PROPERTIES:
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

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Product code: SB31_SPE_100+16pcs_BAG Shipping and Payment

Key features

SpeedBox 3.1 is a tuning chip with an option to set a speed limit for Specialized e-bikes, including SL motors, and the TCU / MasterMind TCU control units. It disables the speed limiter so you can enjoy riding at unlimited speed, while the display keeps showing real values such as maximum and average speed, daily mileage and cruising range.

Tuning control

Activated by switching the e-bike off and on twice, then it stays active

Real values on the display

The display keeps showing maximum and average speed, daily distance and range

Easy installation

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

Compatibility

Motors: all Specialized e-bike motors, including SL

Control units: TCU, MasterMind TCU

Not compatible with: Specialized GEN 4 (3.1 / S-Works), IGH electronic shifting

Technical specifications

Maximum speed	Unlimited (preset assistance limit of 50 km/h)
Display shows	Real values
Custom speed limit	Adjustable (in steps of 5 km/h)
Activation	Activated at all times (set by switching the e-bike off and on twice)
Minimum ride distance before installation	10 km (new bike)

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

Detailed installation and tuning activation procedure for Specialized e-bikes, including SL motors

Printed manual

Inside the product package you will find a printed manual including a wiring diagram for connecting the chip to the motor

Step by step

The illustrated guide will walk you through the installation step by step — from removing the motor cover to the test ride. Each step is accompanied by photos and clear explanations.

User Manual →

Tuning control

SpeedBox is installed into the e-bike frame under the TCU / MasterMind TCU unit.
You activate the tuning by switching the e-bike off and on twice. After that, the tuning remains active with a set maximum assistance speed of 50 km/h.
You can check the currently set maximum speed limit by pressing the + - + - button combination.

Setting a custom speed limit

You set the maximum speed limit by switching the modes from TURBO three levels down and then three levels up: TRAIL → ECO → OFF → ECO → TRAIL → TURBO.
The display will show the default maximum speed limit of 25 km/h. With each brief activation of the WALK function, the limit increases by 5 km/h (some displays may round to the nearest number).
The last displayed limit is saved after 5 seconds of inactivity. Confirm the setting by switching the e-bike off and on twice.

Removing the tuning

If you want to uninstall the SpeedBox from your e-bike, first set the assistance speed back to 25 km/h by doing the mode switch sequence again, and confirm by switching the bike off and on twice.

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 Connect app.

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.