World’s Heaviest Adjustable Dumbbells? 💪 Braingain 45kg Unboxing, Setup & First Test

These might just be the heaviest adjustable dumbbells in the world — the Braingain 45kg adjustable dumbbell set. In this video I take you through the full unboxing, assembly, setup, and first workout test so you know exactly what to expect before buying.

📦 What’s inside the box?

The kit arrives in four large boxes containing plates, frames, and handles. I show you how the dumbbells slot together, how the adjustment system works, and why the stand is crucial for changing weight safely.

⚖️ Weight increments covered:
4.5kg → 9kg → 13.5kg → 18kg → 22.5kg → 27kg → 31.5kg → 36kg → 45kg

✅ Key things I cover in this video:

Full unboxing of the Braingain 45kg dumbbells
How the weight adjustment dial works
First setup and assembly impressions
Noise test – how much rattle at different weights
First workout going from 22.5kg sets up to the max 45kg
Handling tips for heavy weight (scratch-my-nose moment included 😅)
Why careful racking matters to avoid damage

💡 First Impressions:
Solid build and smooth adjustment system
Great value (especially on Black Friday sale – around £380 vs £500+)
Serious space-saver compared to owning a full dumbbell rack from 4.5kg–45kg
Plates can rattle a little at times, and you need to place them back carefully on the rack
Not for beginners — 45kg per dumbbell is heavy and requires proper handling
If you’re building a home gym and want a single dumbbell set that replaces an entire rack, the Braingain 45kg adjustable dumbbells are a strong option. Just be mindful of the plastic components, and don’t slam them down if you want them to last.

👉 Drop a comment if you’ve used these or are thinking of buying them, and let me know if you want a full training review!