Speedbox 3.1 Tuning Kit for Specialized eBikes

We ship fast and free to the UK, USA, Australia & Canada. All orders are fully tracked and dispatched from our UK warehouse.

✅ Tariff-free shipping to the USA & Australia.

❌ Note: Orders to Canada may incur customs charges. Free shipping doesn’t apply to EU/EEA countries.

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

Before ordering, please check your eBike specs to ensure you are ordering the correct chip. If you're unsure, submit this form

• 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

• 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

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

• If possible, remove your battery before starting your installation
• If your eBike uses a smartphone app, switch off automatic updates
• Once fitted, avoid updating your motor as this increases the chance of detection
• Remove your tuning kit before doing any software updates
• Avoid activating/deactivating the tuning kit mid-ride
• Keep your average speed below 35km/h
• On some eBikes such as models with the Bosch Gen4 motor, a countdown is required to ensure the correct milage is recorded
• After a long ride, the countdown will take several minutes. The bike must remain on while this completes
• When stopping for a short time, keep your foot on the pedal to stop the countdown from starting

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 and our team will assist you

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.

Existing eBike Warranty:
The use of any tuning products may void the warranty of your eBike. We take no responsibility for any damages resulting from the use of any of our products.

eBike Laws:
Electric bikes equipped with tuning devices are not allowed to be used on public roads, cycling paths and public places. Electric bikes equipped with tuning products can be used exclusively on private property and entirely at one’s own risk. Under the EU's EN15194 regulation it is illegal to ride your eBike on public roads/cycle paths with a tuning device fitted. 

By purchasing a device from eBike tuner ltd you agree that eBike tuner ltd cannot be held liable for any damage, injury, fine or cost to you, your eBike or anyone else involved in your particular incident.