• Speedbox 3.3 for Giant 1
  • Speedbox 3.3 for Giant 2
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Speedbox 3.3 Tuning Kit for Giant Syncdrive Pro2 & Sport2 eBikes

Speedbox 3.3 Tuning Kit for Giant Syncdrive Pro2 & Sport2 eBikes

In stock

£164.08GBP
£164.08GBP
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New for 2025 – Fully Compatible with current Giant software

Unlock the full potential of your Giant eBike with this performance tuning kit. Designed for SyncDrive Pro2 (85nm) or Sport2 (75nm) motors , it removes the factory speed limit, providing pedal assist up to 31mph (50km/h) for a faster, more exhilarating ride. Once fitted, enjoy accurate speed readings, on/off activation plus a customisable max speed. 

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

Please note: not compatible with older Giant models - shop here

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

Product Benefits

Why choose this product:

  • Fitted to the motor in minutes for a true plug & ride experience
  • Increase the factory speed limit of the bike up to 28mph (can be adjusted)
  • Full use of the display, with accurate speed/distance in kmh or mph
  • All ride modes work exactly the same, including ‘walk mode’
  • Lifetime warranty with all Speedbox tuning kits

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

  • Works with any eBike fitted with a Giant Syncdrive Pro2 (85nm) or Syncdrive Sport2 (75nm) motors only
  • Only works with these two motors, contact us if you're unsure what motor your ebike has

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

View full details

Customer Reviews

Based on 21 reviews
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90.0
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Chris Heath

Great! Customer service was the best also. Thanks!

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George D.

Excellent , it’s taken no more than half hour to fit and works a dream , video on YouTube helped if any one gets stuck

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Gareth B.

Very easy to fit, fast response on the emails. Very happy

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Gary S.

The team were really helpful both pre purchase and after.
The unit I had was amazing and installation was a breeze.
Cant recommend this seller highly enough.

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Loui W.

Easy to get it working. Getting it in was a hassle but once it was in all has been good so far. I didn’t know if this one would have fitted my bike because the motors says sync drive 85nm and not sync drive 2 but turns out it does

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