• Free & Fast UK Delivery

    on all mainland UK orders

  • Interest Free Payments

    Spread the cost on Klarna or Clearpay

  • We're Rated Excellent

    On Trustpilot, over 1,000 Reviews!

  • 24 Months Warranty

    included on everything
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40kg Adjustable Dumbbell (Pair)

4.834,00 kr

£499.99

£399.99

£349.99

With/without stand

Key Features:

  • 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 on 18th September 2025 📦

Free & Fast UK Delivery

We offer FREE Standard Delivery to England, Scotland & Wales on ALL orders.

Express Delivery is available for a small surcharge. All other orders will be subject to additional delivery charges.

Standard Delivery will take 2-4 business days, however we aim to dispatch all orders as soon as possible.

See our Delivery Information page here.

Why choose BRAINGAIN
  • Rated Excellent on Trustpilot, over 1000 5* reviews!
  • Over 50,000 Adjustable Dumbbells sold.
  • UK’s leading Fitness & Home Gym Brand.
  • Spread the cost with Klarna or Clearpay.
  • 2 Years Warranty on everything.

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

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.

  • Turn of a dial

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

  • 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.

  • 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.

DIMENSIONS

Length: 46cm

Height: 21.5cm

Width: 23.5cm

"Game-Changer for Home Workouts!"

These adjustable dumbbells are a fantastic addition to my home gym. The Smart Click technology makes switching weights super easy, and the stand keeps everything neat and accessible. Highly recommend!

Liam Stafford - Manchester

Product Highlights

Explore the key features of our 40kg Adjustable Dumbbell (Pair) by clicking on the pulsing highlights.

Customer Reviews

Based on 73 reviews
88%
(64)
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(1)
M
Mike Jessop

One of the best gym purchases I have ever made (or your money back)! :)

A
Amazon Customer
All in one product

Great product small to space save, good range of weight.

A
Amazon Customer
Great product

They are brilliant! I have had them for around 4 months now and they have worked perfectly. I would definitely recommend. The team at Braingain also contacted me to make sure I was happy with my order.

J
Jake Maguire
Absolutely fantastic

I could recommend these more highly! The ease to select the varying weights and build up through them as lifting them becomes easier is great, as well as the compact size they don’t take up to much space either.

S
Sindhu
Perfect Adjustable Dumbbells for Home Workouts!

Rating: ★★★★★

I recently purchased these adjustable dumbbells, and they have completely transformed my home workout routine. The ability to quickly adjust the weight from 2 to 24 kgs is incredibly convenient, allowing me to seamlessly switch between exercises without needing multiple sets of weights. The build quality is robust, and they feel solid and durable. The adjustment mechanism is smooth and secure, ensuring that the weights don't shift during use. Whether you're just starting out or are a seasoned lifter, these dumbbells are perfect for any workout. Highly recommended for anyone looking to enhance their home gym setup!

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