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Adjustable Dumbbells | Dumbbell Set | Dumbbell Weights

Adjustable Dumbbell Set, 15kg

£39 £49 Save £10

Four Set Weights
Spinlock Collars
Knurl Textured Grip
Mixed Plate Sizes

Set weight: 15 kg Set

Price: £39 £49

Delivery time: 5-7 days after a 24-48 hour handling time
Free UK delivery on orders £75+, otherwise a flat £25
Pay by card or PayPal, handled by the payment provider
14 days to change your mind, plus your statutory rights

Often bought together

Badminton Set £39

Table Tennis Table £349

Balance Beam £119

Product specifications

Set weights available	15kg, 20kg, 25kg, 30kg
This variant	15kg set
Plates	Concrete, in a range of sizes
Bars	Chrome finish
Grip	Knurl textured covers for friction
Collars	Two pairs of spinlock collars
Use	Upper body work, arms, shoulders, back, general strength
Setting	Home, office, anywhere with floor space

Shipping & returns

Tracked delivery anywhere in the United Kingdom. It is free on orders of £75 or more, and a flat £25 below that. Allow 5 to 7 days, after a 24 to 48 hour handling time.

Under the Consumer Rights Act 2022 you have 14 days from delivery to cancel for any reason, and a further 14 days to send it back in resaleable condition. We refund the price you paid, including standard delivery. You cover the cost of returning it unless the item is faulty.

If it arrives faulty, damaged or not as described, we put it right at no cost to you under the Consumer Rights Act 2022 and the EU Sale of Goods Directive 2019/771, return postage included.

Shipping details · Refunds and returns

Looking after it

Keep the bars and threads dry and wipe them after sweaty sessions, because rust on a spinlock thread is what makes a collar seize. Store the plates on the floor or a rack rather than stacked on the bars, and never leave a loaded bar leaning where it can roll. Check both collars are tight before every set, every time.

Four Set Weights15kg, 20kg, 25kg and 30kg

Spinlock CollarsTwo pairs, weight changes in seconds

Knurl Textured GripFriction where your hand is

Mixed Plate SizesSmall jumps as well as big ones

About this product

Spinlock dumbbells in four set weights, from 15kg to 30kg.

Concrete plates, chrome finish bars and knurl textured grips, with two pairs of spinlock collars so the weight changes in seconds.

An adjustable spinlock dumbbell set with mixed plate sizes, so the weight can be set where you need it rather than in big jumps.

Available as a 15kg, 20kg, 25kg or 30kg total set.

The plates are concrete filled and the bars have a chrome finish.

Grips are knurl textured plastic covers, which add friction so a sweaty hand does not roll on the bar.

Two pairs of spinlock collars are included, which is what makes changing the weight a few seconds' work.

Adjustable dumbbells solve a storage problem, not a training one. Two bars and a pile of plates take the space of one fixed pair and cover the range of eight.

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The plates are mixed sizes rather than all the same, which matters more than the headline weight. Small plates let you add two kilos instead of six, and small increases are how strength actually goes up.

The bars have knurl textured grip covers. On a plain smooth bar a sweaty hand rolls, and rolling is how a dumbbell ends up on a foot.

Four set weights exist because 15kg is plenty for arms and shoulders while 30kg starts to cover rows and heavier pressing. Buy the one that fits the work you actually do.

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Still deciding?

Not sure yet? That is fine.

You can change your mind. Under the Consumer Contracts Regulations 2013 you have 14 days from delivery to cancel for any reason, and a further 14 days to send it back in resaleable condition. We refund the price you paid, including standard delivery.

If it turns up faulty, damaged or not as described, that is on us. The Consumer Rights Act 2015 covers you, we pay the return postage, and you can have a repair, a replacement or your money back. Read the full detail on our refunds and returns page, or ask us anything before you order.

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Got questions?

Frequently Asked Questions

What set weights can I choose from?

15kg, 20kg, 25kg and 30kg total.

Is that the weight per dumbbell or the whole set?

The total set weight, which is the bars, plates and collars together.

Do the four sizes cost the same?

No. 15kg is £39, 20kg is £49, 25kg is £59 and 30kg is £69.

Which set should I buy?

For arms, shoulders and general toning, 15kg or 20kg. If you want to row and press with real load, start at 25kg or 30kg.

Can I add plates later?

Yes, standard spinlock plates are widely available. Check the bar diameter against what you are buying.

What are the plates made of?

Concrete filled plates.

Are concrete plates any good?

For home training, yes. They are bulkier than cast iron for the same weight and they should not be dropped, which is true of any home set.

What are the bars made of?

Chrome finish bars with knurl textured grip covers.

What does knurl textured mean?

A patterned surface that adds friction, so your hand does not roll on the bar when it is sweaty.

How do the collars work?

Spinlock. The collar screws down the threaded end of the bar against the plates.

How many collars come with it?

Two pairs, which is one pair per bar.

How long does changing the weight take?

Seconds once you are used to it. Slower than a selectorised dumbbell, far cheaper, and nothing to go wrong.

Will the collars come loose?

Spun down properly they hold. Check both before every set. That is the one habit that matters with any spinlock set.

Can I use them for squats or lunges?

Yes, within the weight available. A 30kg set is light for legs, which is the honest limit of any small dumbbell set.

Are they good for beginners?

Very. Small plates mean small increases, and small increases are what progress actually looks like.

Can I do a full workout with them?

Upper body, yes. Legs will outgrow the weight quickly.

Do they come as a pair?

Yes, two bars, plates and collars.

Can I make one heavy dumbbell instead of two?

You can load one bar with everything, within the length of the bar. Most people split it evenly.

Do I need a mat under them?

It is worth it. Concrete plates on a hard floor mark both. We sell a gymnastics mat that works for this.

Can I drop them?

No. Concrete plates are not drop plates, and neither the plates nor your floor will enjoy it.

Will they rust?

The threads can if they are left damp. Wipe them after sweaty sessions and they will be fine.

A collar has seized, what do I do?

Almost always rust or grit in the thread. Clean it, dry it, and a touch of light oil on the thread prevents a repeat.

How much space do they need?

Very little. That is the main reason to buy adjustable rather than fixed.

How should I store them?

Plates on the floor or a rack, bars unloaded. Loaded bars left standing are the ones that roll off something.

Are they suitable for children?

Weight training for children should be supervised and light, and this is adult equipment. Keep the plates away from small children, since they are heavy and hard.

Are they quiet?

Quieter than a barbell, and quiet enough for a flat if you set them down rather than dropping them.

Can I use them in an office?

Yes, they are small enough to live under a desk.

Do I need gloves?

No, and the textured grip is there so you do not.

How long does delivery take?

Five to seven days across the UK. Under £75 there is a £25 delivery charge, so the smaller sets are often worth combining with another item.

Can I return them?

Yes, unused and in a saleable state. It is a stock item, so the full 14 day right to change your mind applies alongside your faulty goods rights.

The complete guide

Buying your first adjustable dumbbells

4 min read The Outdoor Sports Company

Buy for the exercises you will actually do

The set weight question answers itself once you list the movements.

Curls, lateral raises, shoulder work, light pressing. 15kg or 20kg total is plenty and will be for a long time.

Rows, heavier presses, goblet squats. 25kg or 30kg, and you will still find legs outgrow it.

Almost nobody regrets buying the smaller set for arm and shoulder work. Plenty of people buy 30kg, use 12kg, and store the rest.

Why mixed plate sizes matter more than the total

A set that is all large plates jumps in big steps. If the smallest increase available is five kilos a side, you go from a weight you can lift for twelve reps to one you cannot lift for six.

Small plates make small jumps possible, and small jumps are the entire mechanism of getting stronger. Check the plate mix, not just the headline number.

Spinlock versus the expensive kind

Spinlock, which is what this is: threaded bar, screw collar, plates. Cheap, simple, nothing proprietary, nothing to break. Slower to change, and the bar gets longer as you load it.

Selectorised, the dial or pin type: instant changes, fixed length, several times the price, and a mechanism that can fail out of warranty.

For most home training the slow change is not the constraint people expect it to be. You change weight between exercises, not between reps.

The safety habits, which are short

Both collars, every set. Not most sets.

Set them down, do not drop them. Concrete plates crack and floors dent.

Watch the bar length as you load. A heavily loaded spinlock bar is long, and it will catch a bench, a door frame or your own thigh.

Store plates off the bars. A loaded bar left leaning is the one that rolls.

Getting the most from a small set

Slow the tempo down, do more reps, add a pause at the hardest point of the movement, and use single arm variations to double the effective load.

A 20kg set used well beats a 30kg set used carelessly, and it takes up less of your hallway.

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