Adjustable Dumbbell Picker: Which Type Should You Buy?

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Which adjustable dumbbells

Purchase 1 in the Playbook's order. Four mechanisms exist; the right one depends on how you train, not on a review score. This will also tell you when the answer is to not buy them yet.

What do you already own? A band set with a door anchor An adjustable bench A barbell and plates

Budget for the dumbbells $ Dumbbells only. The bench is priced separately. Top weight you need, per hand lb Leave it blank and give a machine load instead — the arithmetic is below. Or: the heaviest machine stack you currently use lb A chest press, a row, whatever your heaviest is.

Floor space There is room Tight — this shares a room with something else

Will they get dropped? No, they get set down Yes — concrete floor, or I train to failure alone

How you rest between sets Normal rests, straight sets Short rests, drop sets or supersets

The four mechanisms, whichever one you end up with

Screw-collar (spinlock)

A bar, loose plates, and a threaded collar you spin on.

Weight change: 45–90 seconds a side
Top weight: As high as you keep buying plates for

The cheapest route to a real load by a wide margin
Nothing on it can break — there is no mechanism, only threads
Increments come down to your smallest plate, usually 1.25 or 2.5 lb

Changing weight takes long enough that drop sets and supersets quietly stop happening
The plates live loose on the floor and you will stand on one
Collars work loose if you do not seat them properly, and a plate sliding mid-rep is how people get hurt

Selector pin in a cradle

The handle sits in a cradle holding the plates; a pin picks up the ones you want.

Weight change: 3–5 seconds
Top weight: Commonly 50–90 lb a hand depending on the set

Fast enough that the weight you use is the weight you meant to use
The mechanism is simple and takes knocks better than a dial
One pair covers most of the range you will ever need

The handle stays full length even at 20 lb, so it catches your ribs on a chest-supported row and your thighs on a goblet squat
The cradle has to live on the floor in the same place forever
Cheap ones rattle, and the rattle is the plates moving on the pin

Dial or twist selector

Turn a dial at each end and lift the handle out with the plates it selected.

Weight change: 2–4 seconds
Top weight: Commonly 50–55 lb a hand

The fastest change of the four, which matters more than it sounds
The most compact, and the cradle doubles as the storage
Usually the best increments at the light end

The mechanism is the failure point, and every maker of one tells you not to drop it
A dropped set is a repair or a replacement, not a scratch
Most cap around 50–55 lb, which you will reach on a row inside a year

Loadable handles with quick collars

Short bars that take the plates you already own.

Weight change: 10–20 seconds a side
Top weight: As high as your plates and the sleeve length allow

The cheapest thing on this page if you already own a barbell and plates, because you are only buying two handles and four collars
Nothing to break, and it scales as far as your plate collection does
The loaded handle is short, so it clears your ribs where a selector handle does not

Useless unless you already own plates, and the hole size has to match — standard plates do not fit Olympic handles or the reverse
Your plates are now in two places at once; loading a barbell means unloading the handles
Slower than a selector, faster than a spinlock