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Adjustable Kettlebell 18kg vs CAP Barbell Cast Iron Kettlebell

The Adjustable Kettlebell is the superior choice for serious home gyms, replacing seven individual weights with a single steel shell that scales up to 40lbs. The CAP Barbell Cast Iron Kettlebell is a traditional, fixed-weight option best suited for beginners or those who prefer the indestructible feel of solid iron without moving parts. While the adjustable model offers better long-term value for progressive overload, the CAP provides a wider handle and a flat base ideal for floor-based stability exercises.

  • Choose the Adjustable Kettlebell if you want to save space and need multiple weight increments to progress your strength training over time.
  • Choose the CAP Barbell Cast Iron Kettlebell if you prefer a simple, maintenance-free weight for high-repetition endurance work or specific floor exercises.

Prices

  • Adjustable Kettlebell 18kg: $121.90 at The Home Depot (checked today)
  • CAP Barbell Cast Iron Kettlebell: $17.29 at Fleet Farm (checked today)
  • Difference: the CAP Barbell Cast Iron Kettlebell is $104.61 cheaper than the Adjustable Kettlebell 18kg today
A
Adjustable Kettlebells

Adjustable Kettlebell 18kg

Adjustable Kettlebells

$121.90at The Home DepotChecked 1 h ago
See all prices and details
Visit The Home Depot
Pros
  • Replaces seven individual kettlebells
  • Steel shell meets competition standards
  • Powder coating provides superior grip
  • Internal locking mechanism for safety
Cons
  • Requires time to change weight plates
  • Internal plates may rattle if not tightened
CAP
CAP Barbell Cast Iron Kettlebell

CAP Barbell Cast Iron Kettlebell

4.6(2,176 ratings)
$17.29at Fleet FarmChecked 1 h ago
See all prices and details
Visit Fleet Farm
Pros
  • Solid cast iron is virtually indestructible
  • Flat bottom prevents rolling during floor work
  • Wide handle allows for two-handed grips
  • No moving parts or assembly required
Cons
  • Limited to a single weight level
  • Enamel coating can chip over time

What separates them

Adjustable Kettlebell 18kgCAP Barbell Cast Iron Kettlebell
Weight FlexibilityAdjustable from 12lbs to 40lbs (7-in-1)Fixed 10lb weight
ConstructionSteel shell with internal iron platesSolid cast iron single piece
Handle Diameter34mm - 35mm (Competition standard)Generous wide opening handle
FinishPowder coat for better chalk gripIndustrial enamel paint
StabilityRounded competition shapeFlat bottom for floor stability
Space EfficiencyReplaces a full set of weightsRequires separate units for different weights

Price history

$109.99$16.97
Nov 6Nov 12
  • Adjustable Kettlebell 18kg: lowest $109.99 on Nov 12 at Amazon.
  • CAP Barbell Cast Iron Kettlebell: lowest $16.97 on Nov 6 at Walmart; $16.97 on Nov 12.

Prices at every store

Adjustable Kettlebell 18kg

  • The Home DepotNew

    In stock

    $121.90Free shippingChecked 1 h ago
    Visit The Home Depot

Also available at

  • AmazonCheck price at Amazon
  • Bells of Steel USACheck price at Bells of Steel USA
  • eBayCheck price at eBay

Store links may earn us a commission.

Prices and history →

CAP Barbell Cast Iron Kettlebell

  • playitagainsports.comNew

    In stock

    $19.99Checked Nov 10
    Visit playitagainsports.com
  • WalmartNew

    In stock

    $16.97+ $5.99 shippingChecked 1 h ago
    Visit Walmart
  • WalmartNew

    In stock

    $16.97+ $6.99 shippingChecked 1 h ago
    Visit Walmart
  • Fleet FarmNew

    Availability unknown

    $17.29Checked 1 h ago
    Visit Fleet Farm
All 11 stores and price history →

Specs compared

SpecAdjustable Kettlebell 18kgCAP Barbell Cast Iron Kettlebell
MaterialSteel (Shell Material), Iron (Plate Material)Cast Iron
CoatingPowder Coatindustrial enamel paint
ColorBlack, Blue, Purple, YellowGray
Included AccessoriesTools—
Individual Weight12-32 KG (Adjustable Kettlebell)—
Total Weight70.5lb / 32kg (Shell Fully Loaded Weight)—
TypeKettlebell—
Plate Weight4kg (Plate Quantities)—
Weight Increments0.5kg (Smallest Weight Increment)—
RegulationCompetition Standard—
Build TypeKettlebells—
Build FinishPowder Coat—
Show all 38 specsShow fewer specs
SpecAdjustable Kettlebell 18kgCAP Barbell Cast Iron Kettlebell
Build ConstructionSteel Shell—
Grip Diameter1.4" / 35mm—
Length7.5" / 191mm (Handle Width)—
Diameter8.25" / 210mm (Shell Diameter)—
Height2.25" / 57mm (Handle Window Height)—
Width8.25" / 210mm (Shell Diameter)—
Design HighlightsInternally-Loaded—
Ergonomics35mm (Handle Diameter)—
Skill LevelFull Body Workouts—
Weight adjustment

What reviewers say

CAP Barbell Cast Iron Kettlebell

  • 4.6 / 52,176 ratings

Owners rate the CAP kettlebell well overall, with 4.6 out of 5 from 2,176 ratings. Most praise the solid build and value, while a minority mention coating chips and rough handle seams.

What people mention
  • Build qualityPraisedOwners describe the bell as solid cast iron that handles regular use without loosening or cracking.
  • HandleMixedThe wide opening suits two-hand grips, but some find the seam rough on the palms.
  • CoatingMixedThe enamel resists rust, though several owners report chips near the handle.
  • ValuePraisedBuyers see it as a cheap way to add a kettlebell to a home gym.

Questions and answers

Is the adjustable kettlebell safe for swings?
Yes, it uses a safety locking mechanism to secure the internal iron plates, making it safe for high-velocity movements like swings and cleans.
Which is better for beginners?
The CAP 10lb is easier to start with immediately, but the adjustable model is better for beginners who plan to get stronger, as it prevents the need to buy heavier weights later.
Does the CAP kettlebell have a smooth handle?
The enamel finish provides a smooth surface, which is comfortable for high-rep work but can become slippery if your hands get very sweaty compared to powder coating.
Can I use the adjustable kettlebell for push-ups?
While possible, the CAP's flat bottom is specifically designed for stability during floor exercises like renegade rows or kettlebell push-ups.

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  • CAP Barbell Cast Iron Kettlebell vs Adjustable Kettlebell
  • Titan Fitness Cast Iron Kettlebell vs CAP Barbell Cast Iron Kettlebell
  • BalanceFrom Wide Grip Kettlebell vs CAP Barbell Cast Iron Kettlebell

Buying guides that pick them

  • Best kettlebells for home workouts
7 Weight Selections 3kg-18kg
—
Locking mechanismsafety locking mechanism—
Shipping weight8.7Kg—
Maximum weight18 kg—
Handle diameter3.40 cm—
Weight plates6 included cast iron weight plates—
Maximum load18kg (40lbs)—
size—10 lbs
Weight—10 lb
Finish—Enamel coating
Features—Comfort Grip
Fitness goal—Build Muscle
Weight range—10lb
Handle opening—generous wide opening handle
Bottom—Flat bottom
Model number—SDK2G-010AZ
Weight (lb)—10.0