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40kg pair now £299.99 (was £499.99) · 4.9/5 from 3,067 reviews · see the pair below

Home gym · Adjustable dumbbells

7 reasons this 17-in-1 dumbbell replaced my entire home gym

One pair. 5kg to 40kg. Seventeen dumbbells in the space of one pair, so you can train every lift at home without a pile of equipment or plates.

Shop the 40kg pair See the pair below
17-in-1 5kg to 40kg per hand
4.9★ 3,067 reviews
75k+ happy customers
How it works: turn the smart-dial, select your weight, lift.
"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."

The rundown

Why one pair beats a wall of fixed weights

Seven things that made the difference, from the weight range to the footprint to what it costs against buying seventeen pairs separately.

  1. 01

    17 dumbbells in 1

    You replace an entire weight rack

    Every pair from 5kg to 40kg lives in one set of SmartBells. Simply turn the smart-dial to select your weight and lift. No clutter.

    PLACEHOLDER - the single BrainGain pair that replaces 17 fixed pairs of dumbbells
  2. PLACEHOLDER - the pair on its stand, tucked into a corner of a room
    02

    Reclaim the room

    It fits where seventeen pairs never could

    Seventeen pairs of dumbbells worth of training in the footprint of one. Set it on its stand in a corner, beside a desk or under a bench, and the whole range is there when you want it.

  3. 03

    Best value, per Men's Fitness

    The maths beats buying them separately

    Buying 17 different pairs of dumbbells can cost well over £1,000 and take a lot of space.

    "Best Value Adjustable Dumbbell."

    Highly Recommended, Men's Fitness
    PLACEHOLDER - close-up of the smart-dial mid-adjust
  4. PLACEHOLDER - Adil pressing or curling, mid-workout action shot
    04

    Progressive overload built in

    Micro-jumps keep you progressing

    Small, consistent increments across the full range mean you always have the next weight up: the single biggest driver of strength and muscle over time.

  5. 05

    One tool, every muscle

    A complete workout in two handles

    Press, row, curl, squat, lunge, RDL: dumbbells train every major muscle group. With 5kg to 40kg on tap you can run a genuine full-body programme from home.

    PLACEHOLDER - whole-body training montage: press, row, curl, squat
  6. PLACEHOLDER - product build detail: dial mechanism, plate stack, coating
    06

    Built to be handled

    Gym-grade build, not a gimmick

    A secure dial lock, a comfortable grip and a durable coating, built to be racked and adjusted thousands of times.

    • 5kg to 40kg range
    • Turn-the-dial adjust
    • 24-month warranty
    • Compact stand available
  7. 07

    Not just us saying it

    75,000+ customers, 4.9/5 rated

    Thousands of lifters have brought the full range home. GQ called it the way to bring the free weights room home, and 3,067 reviews average 4.9 out of 5.

    PLACEHOLDER - a happy customer at home with the 40kg pair, not review screenshots

"The best dumbbells to bring the free weights room home."

GQ Magazine

The pair, ready to ship

One pair that covers the whole range

The SmartBells 40kg pair is 17 dumbbells in one: turn the smart-dial and move from 5kg to 40kg per hand in seconds. Light enough to learn a movement properly, heavy enough to keep challenging you as you get stronger.

It is backed by 75,000+ customers, a 4.9/5 rating from 3,067 reviews, and a 2-year warranty.

See the 40kg pair

Press quotes as published. Prices, review counts and customer numbers correct at time of publication.

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