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40kg Adjustable Dumbbells

€419,00 €599,00
With/without Stand
  • Easily shift from 5kg to 40kg
  • Pair of 17-in-1 Adjustable Dumbbells
  • Simply turn the dial to change the weight
  • 24 Months Warranty

📦Dumbbells restocked 30th January 2026📦

Delivery and Shipping

We offer delivery to most EU countries. You can see a full list of delivery costs here. You can also check out our delivery FAQs here.

Why choose BrainGain
  • Fast delivery across Europe
  • Rated EXCELLENT on Trustpilot
  • Over 30,000 adjustable dumbbells sold
  • Spread the cost with Klarna
  • 24 month warranty as standard

Overview

Easily shift from 5kg to 40kg with the innovative BRAINGAIN 40kg Adjustable Dumbbells which are perfect for home workouts whether you’re training in your garage, the back garden or your living room. One pair of these adjustable dumbbells replaces a complete set of 17 fixed dumbbells saving you space, cost and time!

The BRAINGAIN 40kg Adjustable Dumbbells are perfectly designed and quality tested to ensure the highest level of safety for all users whether you are a beginner training for the first time or a professional with years of experience. Simply twist the dial on each side of the adjustable dumbbell to set the weight, pick up your weights and you can start training straight away and are a real evolution from the old style, spinlock style adjustable dumbbells.

Adjustable Dumbbells can be used for all your home workout needs and exercises including presses, swings, deadlifts, squats, curls, sit-ups, snatch, renegade row, twists, clean & press, thrust and more.

The 40kg Adjustable Dumbbells come with their own tray to facilitate simple weight changes and tidy storage. Separate stands can be purchased to bring the adjustable dumbbells up to waist height.

The Adjustable Dumbbells are designed to stay with you on your journey. Whether you’re starting on the lightest weight, or something heavier, the adjustable weights will be by your side as you gain strength and go through the weight range.

Features

The BRAINGAIN 40kg Adjustable Dumbbells is the equivalent to 17 individual fixed weight dumbbells. Increments: 5kg, 7kg, 9kg, 11kg, 13kg, 15kg, 18kg, 20kg, 22kg, 25kg, 27kg, 29kg, 32kg, 34kg, 36kg, 38kg, 40kg.

Dimensions: 45cm x 25cm x 25cm

Please note: dumbbells are sold as a pair, representing 2x 40kg so 80kg total. Order sent out in 3 boxes.

Warranty

All of our products come with a 24 month warranty as standard. We offer extended warranty options on selected products which if available will be shown above the 'Add to Cart' button above.

“For the most experienced iron-pumpers, while perfectly catering to beginners too.”

“The build quality is excellent. The knurled metal handle is the icing on the cake.”

“An industrial-strength set of weights with a smart design.”

“Robust... and comfy for most classic moves.”

“Ultra smooth and easy to twist... one of the sturdiest designs we tried.”

  • 17 Dumbbells in 1

    Easily shift from 5kg to 40kg with the innovative BrainGain 40kg Adjustable Dumbbells. No more need for 17 separate weights.

  • Total Body Workouts

    Adjustable Dumbbells can be used for all your home workout needs and exercises including presses, swings, deadlifts, squats, curls, sit-ups, snatch, renegade row, twists, clean & press, thrust and more

  • Base or Stand

    The 40kg Adjustable Dumbbells come with their own tray to facilitate simple weight changes and tidy storage. Separate stands can be purchased to bring the adjustable dumbbells up to waist height.

"Game-Changer for Home Workouts!"

These dumbbells are simply magnificent. They save space, time and money.
Structurally they are solid and aesthetically beautiful. In addition I must point out that they do not make any sound when shaken. Awesome price.

Michael, Trustpilot - Germany

DIMENSIONS

Length: 45cm

Height: 25cm

Width: 25cm

Product Highlights

Explore the key features of our 40kg Adjustable Dumbbells by clicking on the pulsing highlights.