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Wildman Delta-40 Adjustable Kettlebell

One Bell. Infinite Levels. Built in collaboration with Mark Wildman, the DeltΔ adjusts from 14 to 40 kilos (30 to 88 pounds) with precision .25 kilo (.55 lb) micro-loading. A total of 104 bells in one gives you precision and longevity in your training.

$749.00
$799.00 $749.00
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Availability: 34 in stock

What's included

Box 1

  • DeltΔ adjustable Kettlebell
  • Protective Sleeve
  • Wrenches
  • 3kg Plate
  • 4kg Plate
  • Total: 21k (46.2 lbs)

Box 2

  • 0.25kg × 1
    0.5kg × 1
  • 1kg × 1
  • 2kg × 1
  • 4kg × 1
  • 6kg × 2
  • Total: 19.75kg (45.65 lbs)

Combined System Weight: 44.75kg (94 lbs)

  • Total weight can vary + or - 1lb
  • The DeltΔ -Bell will hold up to 40 kg of weight, however we have provided a total weight of 44.75 kgs (94 lbs) to allow the opportunity to increase at 0.25kg or 0.5kg

Every Delta 40K purchase includes a 50% off digital promo code, redeemable at Wildman Athletica.

Gear Specs

Gear Specs

  • 14 kg (30lbs) Starting Weight, shell only, no plates
  • 40kg (88lbs) Max Weight
  • Micro-load by 0.25 kg (.55lbs)
  • 104 Total weight settings ($7 per weight setting)
  • Handle Diameter: 35 mm (1.4 inches)
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$749.00
$799.00 $749.00

Product FAQS

Delta 40k vs Delta 32k?

  • The Delta 40k has 104 settings vs the Delta 32k has 81 settings. That is 23 additional settings.
  • The Delta 40k comes with a 50% off promo code to use at WildmanAthletica.com Wildman demanded this to be part of the Delta 40K purchase to ensure you had the best understanding of how to gradually progress in your kettlebell training. The promo code is valid only at WildmanAthletica.com and will be emailed to you immediately after purchase. 

50% Off Wildman Athletica Promo Code With Every Purchase?

  • A 50% off promo code will be emailed to you post-purchase to redeem at WildmanAthletica.com
  • This is included with every Delta 40k Purchase

Do I really need a kettlebell that loads to 88lbs?

  • As we age the importance of strength training becomes more of a priority. Stressing the body to maintain bone density and overall strength is very important. When it comes to kettlebell training, there are a number of movements such as the kettlebell clean, kettlebell snatch, kettlebell press and squat.
  • With the weight of 88 lbs, these movements can be very challenging however, many people forget about farmer's carries, single-arm and 2 hand deadlifts and isometric holds. Because these movements are not going overhead, you can go heavier, and here is where the ability to load to 88lbs is a huge benefit.
  • These are the forgotten movements that build long-term strength and give you the ability to pick up your grandkids, do yard work, work around the house, load and unload groceries etc. 

Who is this bell for?

  • Anyone that has a home gym, this is a great addition not only because of the amount of movements you can perform but the amount of space it saves, this 1 kettlebell replaces 104 kettlebells

One Bell. Infinite Levels.

The Wildman DeltΔ 40 Adjustable Kettlebell is the first adjustable kettlebell engineered for true long-term strength progression. Built in collaboration with Mark Wildman, the DeltΔ adjusts from 14 to 40 kilos (30 to 88 pounds) with precision .25 kilo (.55 lb) micro-loading, giving you the ability to train the way strength is actually built: one deliberate step at a time ( a total of 104 settings).


If you follow Wildman programming, or you simply want the most mathematically precise kettlebell progression system ever created, this bell is your new foundation.
No clutter. No plate trees. No growing out of your equipment. Just clean, measurable, scalable strength.


Every Delta 40K purchase includes a 50% off promo code, redeemable at Wildman Athletica.

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Everything you need to know

Delta 32K vs. Delta 40K vs. Cast Iron Kettlebell: What's the Difference?

Explore the why behind the different style of kettlebells, to pick the one that best fits your needs.
Adjustable, Competition-Style Design
The Delta 32K and Delta 40K are both adjustable kettlebells that load in precise 0.25-kilogram (0.55 lb) increments — the finest micro-loading available on the market today. No other company currently offers this level of granularity. Both bells are also built to competition specifications, meaning the handle diameter, window (the space between the handle and the globe), and globe dimensions stay identical at every weight setting. This consistency removes variables as you progress, so your technique stays sharp through swings, cleans, rack position, and snatches — you're only changing the load, never the feel of the bell.
Built to save space - and money
If space is a priority, an adjustable kettlebell is the smarter choice. The upfront investment is higher, but when you break it down by price per weight setting, adjustable bells actually cost less than building out an equivalent rack of fixed-weight kettlebells: Delta 32K — $4.50 per weight setting (81 settings) Delta 40K — $7.00 per weight setting (104 settings)
Where Cast Iron Still Wins
Cast iron kettlebells vary in size and shape from brand to brand, but they remain the standard in most local gyms. Their geometry — particularly the flared handle — offers a real advantage in certain movements, like the kettlebell halo and goblet squat, where that flare gives you a more secure grip.
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