Speedbox 3.1 Tuning Kit for Specialized eBikes

• Works with Specialized brand eBikes fitted with TCU displays (on top tube)
• Does not fit bikes with displays on handlebars

Here's why riders love this tuning kit

• 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

🇬🇧 UK

Free delivery to the UK with Royal Mail  Tracked 48. Tracked 24 is available as a paid option.

🇺🇸 USA

Free shipping on all orders, takes 5-7 business days.

Your parcel is exported from the UK and handed to USPS for final delivery.

All tariff charges and import paperwork is handled by us. No surprise customs bills on arrival.

🇦🇺 Australia

Free shipping on all orders, takes 7 business days. WA takes 14 days.

Parcels are delivered by Australia Post once they reach your local network.

We manage all import paperwork, so you won’t receive any unexpected fees.

🇨🇦 Canada

Shipped from the UK with full tracking via Royal Mail. Delivered to you by Canada post.

Canadian orders are subject to import duties or customs charges on arrival.

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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

Unfortunately no tuning kits are 100% guaranteed. You can reduce the risk of triggering an error code by following these simple steps:

If your eBike uses a smartphone app, switch off automatic updates before installing your tuning kit

Remove your tuning kit before doing any software updates

If possible, remove your battery before starting your installation

Keep your average speed below 50km/h

All Speedbox products come with a lifetime warranty. In the unlikely event your product develops a fault or defect. We will replace it for free.

To claim under warranty, simply contact us here

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.