• Speedbox 3.3 tuning kit for Giant Syncdrive Pro2, Sport2, Sport3 and Sport3x e-bikes
  • Speedbox 3.3 module installed on Giant Syncdrive motor — derestricts e-bike to 28mph
  • Speedbox 3.3 connection diagram for Giant Syncdrive Pro2 and Sport2 motors
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Speedbox 3.3 Tuning Kit for Giant Syncdrive Pro2 / Sport2 / Sport3 / Sport3x eBikes

Speedbox 3.3 Tuning Kit for Giant Syncdrive Pro2 / Sport2 / Sport3 / Sport3x eBikes

⚡️Unlimited Speed ✔️Lifetime Warranty

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£179.00GBP
£179.00GBP
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✓ Free Shipping ✓ 30-Day Returns ✓ 12k+ Happy Riders

Unlock the full potential of your Giant eBike with this performance tuning kit. Designed for SyncDrive Pro2 (85nm), Sport2 (75nm), SyncDrive Sport 3 (85nm) & SyncDrive Sport 3x (100nm) motors. It removes the factory speed limit, providing pedal assist up to 31mph (50km/h) for a faster rides. Compatible with the latest Giant software, enjoy accurate speed readings, on/off activation plus a customisable max speed. 

✅ Removes factory speed limit completely
✅ Plug & ride — no specialist tools
✅ Stealth install, completely hidden
✅ Accurate speed & distance
✅ Lifetime warranty included

Looking for a tuning kit that pairs with your phone? Don't miss this premium bluetooth version

You can access a full install video for this kit here. Please note, it's not compatible with older Giant models - shop here

⚠️ For off-road use only. Not legal on public roads. Read full legal disclaimer.

Will this kit work with my bike?

  • Works with any eBike fitted with a SyncDrive Pro2 (85nm), Sport2 (75nm), SyncDrive Sport 3 (85nm), SyncDrive Sport 3x (100nm) motors only
  • Only works with these 4 motors, contact us if you're unsure what motor your ebike has

How long does it take to fit?

We've rated this as an Easy, plug & ride installation

What is your shipping & returns policy?

We ship fast and free to the UK via Royal Mail Tracked 48. Tracked 24 is available as a paid option.

🇺🇸 USA

Free shipping on all orders

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.

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 FedEx

Canadian orders may be 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

What's covered by the Lifetime Warranty?

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

eBike firmware 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.

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