Best Kettlebells UK: Cast Iron, Adjustable and Sets

If you want the best kettlebell set for home workouts in the UK, the good news is you do not need to spend a fortune to get something that lasts. A kettlebell is one of the most versatile and space-efficient bits of kit you can own, good for swings, squats, presses, rows and full-body conditioning. The harder part is choosing between cast iron, vinyl coated and adjustable options, and working out which weights you actually need.

This guide covers four kettlebells we rate for UK home gyms, across cast iron, vinyl and adjustable designs and a range of price points. Whether you want a single bell to start with, a 20kg for heavier swings, or an adjustable that replaces a whole rack, there is a pick below for you.

To see what an adjustable kettlebell looks like in use, this review of the Bowflex SelectTech 840 is a useful watch before you decide between a fixed bell and an adjustable one.

1. Phoenix Fitness Vinyl Kettlebell: Best Overall

The Phoenix Fitness Vinyl Kettlebell is our top pick for most home users in the UK. It is a vinyl coated cast core bell with a wide ergonomic handle, available in 4kg, 6kg, 8kg, 12kg, 16kg and 20kg, so you can buy exactly the weight you need or build up a set over time. Each weight is brightly coloured and clearly labelled, which makes grabbing the right bell quick and easy.

The vinyl coating is the main reason it works so well at home. It protects floors, keeps noise down and is easy to wipe clean, which matters if you train in a bedroom, living room or on hard flooring. Owners praise it as good value and comfortable for swings, squats and lunges. The honest downside is that vinyl coated bells have a slightly chunkier handle than bare cast iron, so if you have small hands or plan to do a lot of high-rep grip work, the handle can feel a touch wide.

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2. Bowflex SelectTech 840 Adjustable Kettlebell: Best Adjustable

The Bowflex SelectTech 840 is the pick if space is tight and you do not want a rack of separate bells cluttering the room. One unit replaces six kettlebells, adjusting between 3.5, 5.5, 9, 11, 16 and 18kg by turning a dial on top. That makes it ideal for small flats, and the quick change means you can move between exercises without stopping to swap bells.

It suits anyone who wants progression in one purchase, from light pressing weights up to a respectable 18kg for swings and squats. The honest downsides are real, though. The shell is plastic rather than cast iron or steel, so it does not feel as rugged as a traditional bell, the body is bulkier than a fixed kettlebell, and the shape takes a little getting used to for swings. It also costs noticeably more than a single cast iron bell. If you value space-saving and convenience over that classic kettlebell feel, it is well worth it.

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3. Amazon Basics Cast Iron Kettlebell: Best Cast Iron

If you want a proper cast iron kettlebell without paying a premium, the Amazon Basics Cast Iron Kettlebell is hard to beat. It is solid cast iron with a textured handle and a flat base so it stands up neatly between sets. It comes in a wide range of weights, from lighter bells up to a 20kg, so it is also a sensible choice if you specifically want a 20kg kettlebell for heavier two-handed swings, deadlifts and goblet squats.

Cast iron has a slimmer handle than vinyl, which many lifters prefer for swing-heavy sessions, and it is extremely durable. Owners rate it as straightforward, sturdy kit at a fair price. The honest downside is that bare cast iron can be a little hard on floors and noisier if you set it down with force, so a mat underneath is a good idea. The handle finish is also fairly plain, so chalk or grip work helps if your hands get sweaty.

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4. FK Sports Vinyl Kettlebell Set: Best Set for Building Up

The FK Sports Vinyl Kettlebell is our pick if you plan to buy more than one bell and build a proper kettlebell set. It is sold in single weights across a broad range, from 4kg up to 24kg, so you can put together a beginner, intermediate and heavy bell that all match in style and handle shape. The bells are cement filled with a vinyl coating, so they protect your floors and stay quiet, and the wide handle is built for swings, squats, presses and lifts.

This is a good option for couples or households where two people train at different strengths, or for anyone who wants to add heavier weights as they progress. The honest downside, noted by some owners, is that the wide handle can feel too large if you have small or medium hands, especially on lighter bells. If you prefer a slimmer grip, a cast iron option may suit you better, but for matching vinyl bells at sensible prices this set is a strong choice.

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Which kettlebell should you buy?

All four of these kettlebells are good buys, so the right one depends on how you train and how much space you have. Here is the quick summary:

• Best overall: the Phoenix Fitness Vinyl Kettlebell is comfortable, floor-friendly and available in the weights most people need, which makes it our top pick for home use.
• Best adjustable: the Bowflex SelectTech 840 replaces six bells in one unit, so it is the one to get if storage space is your main concern.
• Best cast iron: the Amazon Basics Cast Iron Kettlebell is durable, well priced and goes up to 20kg, so it suits anyone who wants a traditional bell or a heavier weight for swings.
• Best set for building up: the FK Sports Vinyl Kettlebell gives you matching bells from 4kg to 24kg, ideal if you want to add weights as you get stronger.

If you are not sure where to start, a single 8kg or 12kg bell will cover most beginner workouts, and you can add a heavier 16kg or 20kg later. A kettlebell pairs well with the rest of a home gym setup, and you can build full sessions around it without any other kit. For more cardio-focused training you might also look at our guides to exercise bikes and rowing machines, and if you are training for body composition our nutrition section is worth a read.

We hope this guide helps you pick the right kettlebell. If you have a question about any of the bells above, leave a comment and one of our team will get back to you.