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TREX SPORT Dumbbell and Barbell Set 20 kg review

A 20 kg pair that converts to a barbell with a supplied 40 cm connecting tube. Bar length, connector length and a per-bar load figure are all published, which is three more figures than most of this shelf gives.

The bottom line Bought for the connector rather than for the mass. Two 44 cm bars and a published 40 cm tube make a genuine two-in-one at a price where most sets publish no lengths at all, and the 50 kg per-bar figure is a declaration worth having even though the four supplied plates come nowhere near it. The thin plate list is the real limit here, not the steel.

What the maker publishes

Two dumbbell bars of 44 cm with a steel core and a plastic outer, four plates in three denominations — 1 kg, 1.5 kg and 2.5 kg — four thickened star collars described as having a double locking arrangement, and a foam-covered connecting tube of 40 cm that turns the pair into a short barbell.

The maker also states a maximum load capacity of 50 kg per bar, and states that the plates are filled with a cement and hardened sand mixture.

Two figures that do not meet

The 50 kg per bar is a statement about what the bar is designed to carry. The set contains 20 kg in total.

Those are not in conflict — one is a capacity and the other is what is in the box — but a listing that prints both invites them to be read as one number. This page keeps them apart, which is the same treatment every load figure on this site gets.

What the connector actually buys

A 40 cm tube joined to two 44 cm bars is a short barbell, not a full one. It is long enough for pressing and rowing and it is not a bar that will sit in a squat rack — the total length is well under what a rack’s uprights are spaced for.

Sold as a space-saving arrangement, it is exactly that, and the fact that the tube is supplied rather than sold separately is worth noting on a shelf where accessories are routinely the second purchase.

The limit

Four plates. Whatever the bars will carry, the combinations available are the ones those four denominations allow, and without a published bore there is no way to confirm from the listing what else would fit.

Availability

About 36 € on the German Amazon store, on the one reading this page rests on.

The American, British, Italian and Spanish Amazon catalogues list the reference with nobody selling behind it.

The French Amazon store returned nothing at all, so the buy button there opens a search rather than an empty page.

These figures are what Keepa returned on the day this page was last written. Stock and prices move without notice.

Prices quoted in this text were read on 20 September 2026. The live price is at the top of the page.

The figures declared, and the gaps beside them

Strengths

  • Bar length, connector length and a per-bar load figure of 50 kg are all published
  • The connecting tube is supplied rather than sold as an accessory
  • Steel core inside the bars, stated by the maker rather than implied

Compromises

  • Only four plates, so the combinations available are few
  • The 50 kg per bar cannot be reached with the plates supplied
  • No bore published, so the set cannot be extended from the listing

Specifications

Weight range20 kg for the set, as the maker states it
Step size1 kg — the smallest plate supplied
Locking mechanismFour thickened star collars with a double locking arrangement, as described
BoreNot published by the maker
Handle diameterNot published by the maker
KnurlNon-slip moulded grip, described rather than measured
Overall length44 cm per bar; 40 cm connecting tube
Set contents2 bars of 44 cm, 4 plates (1 / 1.5 / 2.5 kg), 4 star collars, 1 foam-covered connector of 40 cm
Amazon referenceB0CXF68B6N (one reference across 5 Amazon marketplaces)
EAN5902308231047

What buyers ask about this one

What does the 50 kg figure refer to?

The maker states a maximum load capacity of 50 kg per bar. It is a declaration about the bar rather than a total that the supplied plates can reach — the set contains four plates and 20 kg in all.

How long is the connecting tube?

The maker publishes 40 cm, foam-covered. Joined to the two 44 cm bars it makes a short barbell, and that combined length is worth checking against a rack before assuming it will sit in one.

What are the plates made of?

A plastic shell with a cement and hardened sand filling, which the maker states directly. That is the construction that protects a floor and that takes more bar length per kilogram than iron.

Who this one is for

A first purchase where one set has to be both dumbbells and a short barbell

Price and availability

A reference exists on these Amazon stores: Germany, Italy, Spain, United Kingdom, United States. Listed is not the same as in stock — availability changes daily.

Details checked on September 20, 2026.

Sources

Specifications: the manufacturer sheet for home gym equipment and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.

How we assess products