Kaevon - Bells of Steel Founder and CEO
TRUSTED BY 100,000+ HOME GYM OWNERS

“I built the adjustable kettlebell I wish existed when I started-now it’s helping thousands train smarter at home.”

"Most home gyms don’t have the space (or budget) for a full lineup of kettlebells. This adjustable kettlebell saves space, saves money, and grows with you-with the weight increments you need to keep progressing."

Get the Adjustable Kettlebell
Try it risk-free for 30 days
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BUILT FOR LIFE WARRANTY
OVER 300 5-STAR REVIEWS

"I looked everywhere for an adjustable kettlebell that actually felt right, but nothing came close"

So I built one with the right feel, solid balance, lasting durability, and smarter progression, while replacing the cost and clutter of a full set.

THE ADJUSTABLE COMPETITION KETTLEBELL

  • True Kettlebell Feel - Authentic Shape And Balance, No Bulky Adaptations.

  • Precise Progression - 0.5 Kg And 1 Kg Increments, No Big Jumps.

  • Confidence In Every Swing - Stays Tight Through Training, Premium Steel, No Rattle Or Questionable Durability.

  • Full-Lineup Versatility - Replaces A Full Set, Not Just A Few Bells, Saving Serious Space And Money.

  • More Ways To Train Your Way - Available In 4 Colors And In 12–20 Kg Or 12–32 Kg Ranges.

"...The one kettlebell to replace them all"

SHOP ADJUSTABLE KETTLEBELLS
Try it risk-free for 30 days

"Why This Kettlebell?"

MINIMAL FOOTPRINT

Get a full kettlebell rack worth of versatility in the space of your favorite lifting shoes.

STEEL CONSTRUCTION

Built from solid steel. Backed by our lifetime warranty. This isn’t plastic junk designed to break.

PROGRESS LIKE A PRO

Micro-loading helps beginners feel confident and gives advanced athletes the precision they need to break plateaus. No guesswork. No awkward leaps. Just smooth progression at your pace.

41 WEIGHT OPTIONS

From 12kg to 20.5kg with 0.5kg and 1kg increment plates. No more awkward jumps between weights.

TRUSTED BY 100,000+ HOME GYM OWNERS

THOUSANDS OF TRUSTED REVIEWS BY GYM ENTHUSIASTS

Pair of Adjustable Competition Kettlebell

These kettlebells are great! I use them all the time.

Michael S.
Verified Buyer

Delivers

It is everything promised. High quality hardware. Going to order after market washer as suggested by another reviewer, maybe they should be included.

Alexander L.
Verified Buyer

Excellent space saving product

I'm just getting into kettlebells and I'm also working with gymnastic rings.

Guy B.
Verified Buyer

Great set of kettlebells.

They will meet my needs for many years to come with the expansions pack.

Richard B.
Verified Buyer

Great addition to home gym

I wanted to add kettlebells to my home gym. This is the best option. Easy to customize.

Josh D.
Verified Buyer
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30-Day Returns
Financing Available
Lifetime Warranty
1 18

Adjustable Competition Kettlebell

4.9
Rated 4.9 out of 5 stars
452 Reviews
£169.99 GBP
Tax included Shipping calculated at checkout.

Save money & space with Adjustable Kettlebells! New colours available!

Kettlebell Weight
Colour: Black
Single or Pair
Financing Available
Free & Fast Shipping
30 Day Returns
Excellent Warranty
2 months ago

Worth every penny!

The ability to incrementally scale up your practice can not be overstated. The build quality is top notch, fast and free shipping is much appreciated, and customer service has been great. Really a brilliant design and execution. Will be buying another!

P
Patrick
Verified Buyer
I recommend this product

Product Details

“As a beginner to kettlebells this product has been a game-changer. The adjustable range lets me progress without buying multiple kettlebells, while maintaining proper form. It’s solid, well-made, and saves a ton of space.” — Robert D

The Adjustable Competition Kettlebell replaces an entire set with 41weight options packed into one tidy shell.

  • True kettlebell shape → unlike bulky competitor adjustables, ours feels just like the real thing. That means you can comfortably perform cleans, snatches, and flows without awkward, wrist-bashing design flaws.
  • Progress at your own pace with 0.5kg & 1kg increment plates (no more awkward, massive jumps).
  • Unlock “in-between” weights you won’t find in regular kettlebells.
  • Save thousands compared to buying a full set.
  • Free up floor space — one compact bell instead of a whole rack.

One bell to rule them all — beginner to advanced.


Why Kettlebells?


Because kettlebells do what bars and dumbbells can’t:

  • Strength + cardio in one go  build muscle and burn calories without swapping equipment.
  • Real-world strength  training that carries over to sports, daily life, and even hauling in your groceries.
  • Total-body efficiency  work multiple muscle groups at once, not just one at a time.
  • Compact powerhouse  a full gym’s worth of versatility in a fraction of the space.

They’re the overachievers of the fitness world — and now you only need one.

What's Included

12–20.5 KG Adjustable Kettlebell Includes:

  • 12 kg kettlebell shell
  • 1× 3 kg plate
  • 2× 2 kg plates
  • 1× 1 kg plate
  • 1× 0.5 kg plate
  • Allen key & wrench for adjusting


Warranty & Guarantees

Add your content here

Every kettlebell comes with a Limited Lifetime Warranty, so you can lift with confidence.

We design our gear to last through years of serious training, but if something ever goes wrong due to a defect in materials or workmanship, we’ve got your back.

Here’s the gist:

You’re covered against manufacturer defects for the lifetime of the product.

What’s not covered? Normal wear and tear, cosmetic scratches, or the aftermath of dropping your kettlebell off your roof (please don’t).

How it works: If you ever need to make a claim, just reach out to us with your order details and a quick description of the issue. Our team will review it and get you sorted as quickly as possible.

Other Questions?Contact our support team—we're here to help.

Shipping & Returns

We get it — shipping heavy gym gear raises some important questions. Here’s exactly what to expect:

Free Shipping: Available on all orders across the continental U.S. No hidden fees.

Shipping Time: Orders ship within 1–3 business days and usually arrive within 3–7 business days (during sales events, delivery may take up to 2 additional business days).

Fulfilled mostly from our main distribution centers in Los Angeles and Indianapolis for faster coast-to-coast delivery. Local to Indy? Pick up in-store!

Returns: All Bells of Steel products are backed by our return policy If you don’t love your order, return it within 30 days—simple and stress-free.

See the kettlebell in action

Reviews Summary
Customers say these adjustable kettlebells are extremely solid, sturdy, and well-built with excellent fit and finish. They appreciate the easy weight adjustment process, though many note it takes a couple of minutes rather than being instant. Users find the handle comfortable with good grip, and the bells feel balanced and secure during use. Many mention the space-saving benefits, replacing multiple fixed-weight kettlebells. The competition-style design receives praise for feeling like traditional kettlebells when in use. Some customers note occasional plate loosening during intense workouts and suggest checking tightness before sessions. Overall, users are highly satisfied with the quality, durability, and versatility for home gym setups.
4.9
Rated 4.9 out of 5 stars
Based on 452 reviews
99%would recommend this product
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452 reviews
  • AM
    Andrew M.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    6 hours ago
    Sturdy and works as intended

    I was a little skeptical with an adjustable bell.

    Adjustable weight in the past have always let me down, usually feeling rattly and insecure.

    I've had this for a few months now and have had no problems. Weight feels nice and secure and I don't have any worries of it falling apart.

    Considering getting a second one already.

    Was this helpful?
    Bells of Steel Canada
    3 minutes ago

    Thanks for the awesome review! We’re stoked to hear your Competition Kettlebell has been rock solid and secure through months of use. Sounds like it’s earned its place in your gym! A second one might just be calling your name. 💪

    Yours in strength, The B.o.S. Crew.

  • S
    Sean
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 4 out of 5 stars
    5 days ago
    10 month review

    After owning BoS kettlebells for 10 months, this is my review.

    TLDR: Buy two of these kettlebells ASAP but they will not last a lifetime.

    With two kettlebells (KB), you can have a light and heavy KB going at the same time. A 50LBS KB for swings, squats, rows; a 40 LBS KB for presses. Changing weights is not fast, having two allows you to simply swap them.

    These KBs will not last a lifetime; the build quality isn’t there and isn’t as high as Rough Fitness. The powder coating immediately started chipping around the seam during single KB workouts. It gets worse with double KBs.

    The internal plates don’t lock down tight enough, causing small metal shavings inside the KB as the weights rub against the mettle post. You will want to get four large washers from ACE Hardware to better lock down the plates. Even with the washers, you will notice some plate movement during double KBs cleans as the plates rotate.

    All said, I would still absolutely get BoS KBs over Titan or Ironmaster. The smaller 1-2 LBS has been helpful for increasing overhead press weights. You can move the weights up and down inside the bell to adjust the center of gravity.

    Plan on either working out outside or buying a 0.5-inch rubber floor mat(s). I’m not sure why BoS doesn’t sell professional flooring, but I’d recommend a 6’x4’ or 6’x6’ area.

    BoS support is fantastic.

    Was this helpful?
  • KT
    Kim T.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Best kettlebells

    I bought the pair and it was so worth it. Easy weight change. Saves room in my small gym. No rattle and feels like a real kettlbell.

    Was this helpful?
    Bells of Steel Canada
    1 week ago

    Thanks so much, Kim!

    We’re thrilled the adjustable kettlebells are earning a spot in your small gym. Easy weight changes, no rattle, and that real kettlebell feel make them a pretty tough combo to beat. 💪

    Yours in strength, The B.o.S. Crew.

  • MF
    Michael F.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Awesome Kettlebells

    I love these kettlebells. For someone just getting into kettlebell training, these are perfect. I love the yellow color. It brings a little pop of color to the gym!

    Was this helpful?
    Bells of Steel Canada
    1 month ago

    Hey Michael!

    Thanks so much for the awesome review!

    We’re thrilled to hear these kettlebells are treating you well as you get into kettlebell training. And that yellow pop is definitely a gym mood booster!

    Yours in strength,

    The B.o.S. Crew. 🏋️

  • RK
    Richard K.
    Flag of United States
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Love it

    Love this kettlebell. I wish I would’ve bought 2.

    Was this helpful?
    Bells of Steel Canada
    2 months ago

    Thanks, Richard!

    We are thrilled to hear you are loving your kettlebell! Sounds like it made a great first impression... and maybe it is already convincing you it needs a training partner. 😄

    Thanks for sharing your feedback, and happy lifting!💪

    Yours in strength,

    The B.o.S. Crew.

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Frequently Asked Questions

What weights are included?

The Adjustable Competition Kettlebell comes with a full range of weight plates so you can configure it from a light warm-up weight all the way to a challenging load — all with one bell.

How fast can I change weights?

Weight changes take just seconds — simply remove or add the magnetic plates and you're ready to go. No pins, no clips, no tools required.

Is this good for beginners?

Absolutely. The adjustable range means beginners can start light and progressively increase load as they build strength — without buying multiple kettlebells.

Is it HSA/FSA eligible?

Yes — our Adjustable Competition Kettlebell qualifies as a fitness/health expense under many HSA and FSA plans. We recommend confirming with your plan provider before purchase.

GET YOUR ADJUSTABLE KETTLEBELL

  • FREE SHIPPING OVER £99

  • ESTABLISHED IN 2010

  • EXCELLENT WARRANTY