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Northern Cast Iron Kettlebells - 4kg

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Weight: 4kg (Selected)

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4kg Cast Iron Kettlebells for Strength Workouts

Introducing Northern 4kg Cast Iron Kettlebells, the perfect free weight for strength training, endurance, and core . Swing, snatch and press with our 4kg kettlebells cast iron. Our cast iron kettlebells are made from durable single piece cast iron. Train harder, lift heavier at home or in the gym with our 4kg cast iron kettlebells.

Comfortable Grip and Ergonomic Design

Each 4kg kettlebell features an ergonomic design handle providing a firm and comfortable grip during your routines. The wider handle (larger than competition kettlebells) allows you to train with two-handed kettlebell exercises to protect your hands from the risk of strain or injury during your workouts.

Stable Weight Distribution for Better Swings

Our 4kg kettlebells cast iron materials provide a better and more balanced weight distribution, ensuring stability and efficient control during your kettlebell swings and snatches. Perform your lunges or squats effectively and swing better to engage your core muscles and build strength.

Compact and Versatile

The compact size and versatile functionality of our 4kg kettlebells, making them perfect for home kettlebell training, personal trainers, and fitness enthusiasts. Train harder with full-body workouts, kettlebell circuits, or incorporate them into your existing routine to add intensity and increase your power at home.

Smooth and Durable Finish

The smooth surface of the kettlebells allows for a comfortable grip, while the durable finish resists rust and chipping for long-lasting performance. The flat base ensures stability when placed on the floor, making them ideal for exercises that require stationary movements. On each kettlebell, you will find the weight stamped on the front, with each weight represented by coloured bands around the handle too.

Built for Results, Engineered for High Reps & Swings

Improve your core strength, build muscles and enhance your overall fitness with our 4kg Cast Iron Kettlebell. Achieve your fitness goals with every swing and snatch. Durable kettlebells made for your high-rep routines.

Please note: the colour rings to indicate kettlebell weight may appear in a different colour.

Key Features & Benefits

Solid Iron Construction

Built to withstand the impact of high-intensity gym sessions. Forged from single iron piece for balanced, predictable center of gravity through every rep and intense routines.

Thick Handle and Ergonomic Design

The thick handle improves your grip strength, while the wider handle provides you with a comfortable grip during two-handed workouts. Grip and swing. Build that core power.

Colour-Coded Rings

Each 4kg cast iron kettlebell has its weight stamped and vibrant colour bands that don't just look sleek; they also act as a visual cue for fast-paced circuit training.

Durable and Matte Finish

Coated in a matte finish that stays durable even with intense workouts. Resist rust, chipping, and scratches over the years.

Versatile Equipment

One gym equipment, multiple workouts. Designed for strength and hybrid training, allowing you to easily switch between explosive cardio intervals and heavy strength sets. Start your muscle-building resistance work with our 4kg kettlebell cast iron.

Kettlebell Weights for Men & Women Guide

For Men

Beginner - (6kg – 12kg)
Intermediate - (14kg – 20kg)
Advanced - (22kg – 28kg)

For Women

Beginner - (4kg – 8kg)
Intermediate - (10kg – 16kg)
Advanced - (18kg – 24kg)

Available Cast Iron Kettlebell Weights

Light	Intermediate	Heavier
2kg Cast Iron Kettlebell	10kg Cast Iron Kettlebell	18kg Cast Iron Kettlebell
4kg Cast Iron Kettlebell	12kg Cast Iron Kettlebell	20kg Cast Iron Kettlebell
6kg Cast Iron Kettlebell	14kg Cast Iron Kettlebell	24kg Cast Iron Kettlebell
8kg Cast Iron Kettlebell	16kg Cast Iron Kettlebell	28kg Cast Iron Kettlebell

We also have cast iron kettlebell sets to eliminate your training gaps and provide support for progressive overload.

Materials Sourcing the industry best materials

Shipping & Returns Standard Delivery at just €4.99

Dimensions Size guide for product

Care Instructions Get the best out of our product

Build strength with every swing

Strong, solid piece of cast iron for strength training and explosive power exercises.

Overhead workout using cast iron kettlebell with red grip markings

Every rep counts

Grip. Swing. Repeat.

Balanced weight that moves consistently through every rep.

Woman athlete performing overhead workout using Northern Kettlebell Weight

Lift overhead or swing it

Build Stronger Muscles

Classic design for building explosive power and core strength.

Firm gripping cast iron kettlebell during high intense workout

Stays stable on the floor

Flat Base

Stable base for push-ups, rows, and everything in between. Stays grounded for every floor workout.

Space Saver

Compact Design

Kettlebell weights that store anywhere. Easily fit in racks or in compact spaces.

Powder coated kettlebell use in kettlebell swing workout

Durable Finish

Resists rust, sweat and withstands intensity from functional workouts. Grab, lift, and earn every single rep.

Closeup view of wide handle grip of cast iron kettlebell weights

Compact & Versatile

Smash everything from functional strength to explosive movements. Pick your pace, keep it moving.

Athlete gripping a heavy duty kettlebell with engrave weight marking

Engrave Weight Markings

Bold weight markings engraved into solid cast iron so you always know what you’re lifting.

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Got Questions? We’ve Got Answers

If you can’t find the answer you’re looking for, please contact our dedicated customer service experts, they’ll be happy to assist and provide the support you need

Are cast iron kettlebells better than competition steel ?

Depends on what you're training for. Cast iron has a wider handle than steel competition kettlebells, better suited to two-handed swings and goblet work.

While steel kettlebells stay the same size regardless of weight, cast iron increments grow as you get stronger, this is what levelling up feels like.

If you want that classic, rugged feel with more room for your grip, these cast iron kbells are perfect.

What are the best exercises to perform with a 4kg cast iron kettlebell?

A 4kg kettlebell is perfect for dynamic, high-mobility movements and upper-body workouts. It is best for single-arm kettlebell swings, overhead presses, upright rows, kettlebell halos and Russian twists.

Can I lose weight and build muscles using cast iron kettlebells?

Exercises with cast-iron kettlebells fire up your entire body, from your glutes to your core. Every swing and lunge burns fat and supports weight loss. With proper progressive overload and increasing your workout intensity, you can lose that weight and fat while building pure muscle.

How do I maintain cast iron kettlebells to stop them from rusting?

Cast iron kettlebells are finished with a durable coating that resists chipping and rust, but simple cleaning and maintenance can help extend their lifespan. After each strength training session, wipe down the kettlebell to remove sweat. This keeps the professional finish looking sharp and ready for the next use. Store them in a dry place or on a kettlebell stand or rack. Following these simple steps helps prevent rust in your gym equipment.

What kettlebell weight should I start with as a beginner?

For beginners, start with an 8kg to 12kg kettlebell for women or a 10kg to 16kg kettlebell for men. Your goal is to master the form and the basic. Then you slowly increase the weight in progressing. Choosing a weight in this range ensures you can move with the necessary speed and explosiveness without putting a strain on your muscles.

Cast iron kettlebell or vinyl: which is better for strength training?

For raw strength, cast iron kettlebells are better because their solid, compact build and textured grip are made for technical work and smashing personal bests. Meanwhile, vinyl kettlebells are designed for hybrid training, with a protective coating that makes them ideal for quieter workouts and floor-friendly use.

Who is a 4kg cast iron kettlebell best suited for?

A 4kg kettlebell (8.8 lbs) is a versatile weight that is best used for starting point. It is perfect for high-rep metabolic conditioning, entry-level strength training, endurance training, and for those individuals who performs shoulder or core rehabilitation.

Can I do two-handed swings with a 4kg cast iron kettlebell?

Yes. A 4kg kettlebell has a more compact profile and a narrower handle compared to heavier kettlebells. If you have smaller hands you can fit both hands onto the bar to do two-handed swings, but most lifters will find it more comfortable to hold the kettlebell securely by its outer sides when executing two-handed exercises.

How do I know when I am ready to upgrade to a heavier kettlebell weight?

Perform 3 to 4 sets of 15 to 20 continuous repetitions of a specific movement (like single-arm overhead presses or kettlebell swings) with the correct form, absolute control, and zero breakdown in your posture. If you can complete the entire set at a controlled tempo without having to pause mid-set to catch your breath or rest your grip, your muscular endurance has surpassed that weight.

Cast-iron kettlebell weight used for strength and conditioning training.

Build Strength

Overhead workout with Northern Cast Iron Kettlebells

Solid-Cast Iron

Picking up Northern Kettlebells from the floor during intense kettlebell workouts

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