Speedbox 3.1 Tuning Kit for Specialized eBikes
Speedbox 3.1 Tuning Kit for Specialized eBikes
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Enjoy plug & ride tuning with this kit for Specialized eBikes (excluding Gen4 Levo). Fitted to the TCU in minutes, it will be permanently active once fitted, giving you a maximum speed of around 45km/h. Riders also have the option to set a custom max speed if the bike has a TCU with digital readouts
- Works with all Specialized brand eBikes with a TCU on the top tube. Including SL versions with Mastermind TCUs but excluding Gen4 Levo
- Please note, speed readings in the Mission Control app may not display correctly
⚠️ For off-road use only. Not legal on public roads. Read full legal disclaimer.
Product Benefits
Product Benefits
Why choose this product:
- Fitted to the motor in minutes for a true plug & ride experience
- Activated at all times
- Completely removes 15mph restriction, also works with US spec ebikes with 20mph limit
- All ride modes work exactly the same, including ‘walk mode’
- Lifetime warranty with all Speedbox tuning kits
Shipping & Returns
Shipping & Returns
We ship fast and free to the UK with Royal Mail. Shipping rates for the USA, Australia & Canada are shown clearly at checkout – no hidden fees
🇺🇸 We cover all US import paperwork for you and ensure no surprise bills on delivery. Just one flat fee of $39 USD
🇦🇺We cover all AU import paperwork for you and ensure no surprise bills on delivery. Just one flat fee of $39 AUD
🇨🇦 Orders to Canada may incur customs charges on delivery
Changed your mind? No problem. We offer 30-day returns — no hassle, no stress.
If something’s not right, we’ll sort it.
🔍 See full Shipping & Returns info here
Compatibility
Compatibility
- Works with Specialized brand eBikes fitted with TCU displays (on top tube)
- This kit does not work with Specialized SL models. Or bikes fitted with TCD display on handlebars
Warranty
Warranty
In the unlikely event your product develops a fault or defect. We will replace it under warranty. All Speedbox products come with a lifetime warranty.
To claim under warranty, simply contact us here
Software Updates
Software Updates
Updating your eBike’s motor firmware may block or disable your tuning kit.
We recommend avoiding firmware updates especially through service centres unless absolutely necessary. Most updates are optional, and a working eBike doesn’t usually need one.
Keep in mind:
✔ Firmware upgrades can remove tuning compatibility
✔ Tuning is only guaranteed to work with the firmware version available at time of purchase
✔ A blocked tuning kit due to a firmware update is not covered under warranty
If you’re unsure, reach out before updating. We’re here to help you keep your ride running exactly how you like it.
Works perfectly 👌
brilliant product!!
Super easy to install and works great as it's advertised! I highly recommend it
Very easy to fit and fantastic product.
Excellent product. Easy install. Fantastic customer service. Would highly recommend.