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





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.