# Amonax AM-163900040 20kg Adjustable Cast-Iron Dumbbell Set

Amonax AM-163900040 is a 20kg adjustable cast-iron weight set that the listing describes as convertible between dumbbells and a barbell. Its plate-and-spinlock format offers changing weight combinations for home strength exercises, but the listing also references 30kg versions, so confirm the selected 20kg configuration and contents before ordering.

- [Original product page](https://bargainpostbox.co.uk/product/amonax-am-163900040-20kg-adjustable-dumbbell-set)
- [View offer](https://bargainpostbox.co.uk/visit/amonax-am-163900040-20kg-adjustable-dumbbell-set)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Amonax
- Model: AM-163900040
- Category: Sports & Outdoors > Fitness & Exercise > Weights & Strength Equipment
- Price: 46.74 GBP
- Previous price: 54.99 GBP
- Discount: 15%
- Price checked: 2026-11-13T06:01:32.184Z
- Rating: 4.6 / 5
- Reviews: 2057

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Listing describes adjustable cast-iron plates and dumbbell bars that can be joined with a connector to form a barbell.
- The stated plate selection is intended to allow different weight combinations for home training.
- The listing claims knurled grips and steel spinlock collars.
- A workout guide is claimed as part of the set.

## Pros

- Dumbbell-to-barbell conversion provides more than one lifting setup from the listed bars and connector.
- The listing describes several plate sizes, which can support varying loads without a separate fixed-weight dumbbell for each load.
- Cast-iron plates and alloy-steel handles are specified.

## Specifications

### Identity
- Brand: Amonax
- Model: AM-163900040
### Dimensions and installation
- Weight listed: 20 Kilograms
- Dimensions: 36L x 17W centimetres
- Handle diameter: 3.5cm
- Grip size: Medium
### Materials and protection
- Material listed: Cast Iron
- Handle material: Alloy Steel
### Set details
- Adjustability: Adjustable Weight
- Number of items: 12
- Number of pieces: 13
- Number of packs: 1
- Colour: Black 20KG
- Style: Adjustable
- Target use body part: Hand
- Country of origin: China
- EU spare part availability duration: 2 Years

## Before you buy

- The listing is inconsistent about this product's configuration: the title mentions 20kg and 30kg, while product details identify the colour and set as 20KG and the stated weight as 20 Kilograms. It also gives 12 items and 13 pieces, and separate descriptions refer to a 30 kg dumbbell and a 15kg pair. Confirm the selected version, total weight and parts included before purchase. The listed care tips say to avoid dropping the weights and check that collars are tight.

## A good fit for

- Home users wanting adjustable cast-iron weights that can be used as dumbbells or joined as a barbell.
- Buyers who prefer changing plates and spinlock collars over a quick-adjust selector mechanism.
- People planning varied upper- and lower-body strength exercises with one set.

## Less suited to

- Buyers who need a clearly confirmed 30kg set or precise per-dumbbell maximum without first checking the selected listing.
- Anyone seeking fixed-weight or selector-style dumbbells for especially rapid weight changes.

## Customer feedback

Customer feedback highlights perceived sturdiness, straightforward assembly and a comfortable grip, with positive comments about using the set for home workouts. Some feedback reports that plates can loosen, and experiences of durability are mixed, including reports of coating peeling. These points matter for a plate-and-spinlock set that needs collars checked during use. Aggregate ratings are mostly five-star, but ratings alone do not establish performance or resolve those reported concerns.
- Positive themes: Customers describe the set as sturdy and easy to assemble.
- Positive themes: Customers mention a comfortable grip and suitability for home workouts.
- Negative themes: Some customers report that weights can sometimes become loose.
- Negative themes: Some customers report coating peeling.
- Mixed feedback: Durability experiences differ, with some reporting no visible wear and others reporting coating issues.

## Frequently asked questions

### Can the dumbbells be converted into a barbell?
The listing says the set includes a chrome connector for joining the dumbbell bars. Confirm the selected configuration and included components because the listing contains conflicting set details.
### What is the listed weight?
The product details state 20 Kilograms, but the title also mentions 30kg and other descriptions refer to a 30 kg dumbbell and a 15kg pair. Verify the selected version before ordering.
### What parts does the listing claim are included?
Its box description claims cast-iron plates in three sizes, two dumbbell bars, a chrome connector, four spinlock collars and a workout guide. Other item and piece counts differ, so check the selected listing.
### What should I know about customer feedback?
Customer feedback describes the set as sturdy and easy to assemble, while also reporting occasional loosening and mixed experiences with coating durability. The listing recommends checking collars are tight and avoiding drops.

## Alternative options

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## Images

![Amonax AM-163900040 20kg Adjustable Cast-Iron Dumbbell Set — 1](https://bargainpostbox.co.uk/i/iaX3YxKoSD9A3FaOijCoWp9UrYM3vHGv17jq3IlNAprFkQez2CxzhT1VKDkf9d1LwcOagCYPDikLR5qbwz8k9KakQRfBQY3wJrx6FU8yud6egVQ44HOXMMWa.jpg)

![Amonax AM-163900040 20kg Adjustable Cast-Iron Dumbbell Set — 2](https://bargainpostbox.co.uk/i/1qQctLGNTvdoj7cmEDBG2GZ8Rc-8hFABNyz-DXrdcigN0JdM2Bt6aY8CrDkO6d1j6ZH6BPe6hqQhZSCJWUe2IG2ZvWsL_b2zuU5UEjiA1WN0uzhT8BCfx8A1.jpg)

![Amonax AM-163900040 20kg Adjustable Cast-Iron Dumbbell Set — 3](https://bargainpostbox.co.uk/i/yItS76xA9wfspnKVfif4jPt1ZetX4JuMNpTVHd8p5IYWNbQ18I9qFOY3ujMG9KXSqaWlrmVThVQALcf7vpWBg_pUNvNd5-WdICLIwyNfWnFZ4FC8a1lsy_d2.jpg)

![Amonax AM-163900040 20kg Adjustable Cast-Iron Dumbbell Set — 4](https://bargainpostbox.co.uk/i/eqoW2lW_pFgjLAjjYbxxMwUeO8RohRHGTuRltQ3f03NTOhdMo80Mx_xiiwxoaNG1gU9MS9359iHm2D9k6VbKra-OPRjaxaL5ov7IIw0Es80H5kZ7VaQRR-SW.jpg)

![Amonax AM-163900040 20kg Adjustable Cast-Iron Dumbbell Set — 5](https://bargainpostbox.co.uk/i/WuEvxEjvrmoKTTcrGsNybE3UM0ULvXLLWyyC4gSbFCLYhjMJidgvi0FCcJfaD3m57wpjccC4qijGijChy9jvs4Ux6D9KXP1PmqKDoKDPr98UwbOAebQfYR-O.jpg)

![Amonax AM-163900040 20kg Adjustable Cast-Iron Dumbbell Set — 6](https://bargainpostbox.co.uk/i/ughQf2mAcqvHRao83FYzbMUXIAaLfY2z3MXg561pdWCR3MR-8Rh_l9bGEWW88u6N9W6RFkQIQGwb4iG50flVA_NhgMmHJ9TAgFaueFkOkcnoOCM07ec6drB5.jpg)