---
title: "Cast Iron Weights — £69K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/sports-outdoors/cast-iron-weights"
last_updated: "2026-07-31T08:12:51.297Z"
locale: en
meta:
description: "Niche score 51/100 · £69K/yr market · 120K searches/yr · £39.59 avg price. A small market ($69K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 51/100 · £69K/yr market · 120K searches/yr · £39.59 avg price. A small market ($69K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Cast Iron Weights — £69K/yr Amazon UK Niche (2026) - Flapen"
---
# **cast iron weights**
**Worth a look**
Shows low returns (0.3%), but a small market ($69K/yr) keeps it on the watch list.
Market size 17Growth 26Conversion 18Competition 89Returns 99Price range 50Avg price 95Brand share 64Review moat 63Quality gap 32
**Returns**
**Incredible****0.3%**
return rate — above 5% kills the launch gate
**Avg price**
**Incredible****£39.59**
avg listing price — sweet spot $15–$100
**Competition**
**Great****26%**
top-5 click share — an open shelf
**Brand share**
**Good****67%**
top-5 brand share — brands hold most of the demand
**Review moat**
**Good****970.45**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Good****£5.15–£175.38**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Quality gap**
**Okay****4.6★**
avg incumbent rating — lower means beatable quality
**Growth**
**Okay****+0.9%**
90-day search growth — must beat 0% to launch
**Conversion**
**Bad****1.5%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Bad****£69K**
£69K/yr · 120K searches
According to Flapen's Amazon United Kingdom niche tracking, cast iron weights is a £69K/yr Amazon United Kingdom market (120K searches/yr). The top 5 brands hold 67% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **cast iron weights market data**
- **Units sold / yr**
- **2K–2K**
- avg 0–100/product
- **Revenue / yr**
- **£59K–£79K**
- units × avg price
- **Conversion rate**
- **1.5%**
- **Avg BSR**
- **#99**
- **Page quality**
- **0%**
- **Prime**
- **42%**
- **Sponsored**
- **74%**
- **Out of stock**
- **7.5%**
- **Avg brand age**
- **49 months**
- **Avg seller age**
- **202 days**
## **Competition & brand share**
Clicks spread well past the top 5 (26% combined) — an open shelf where new products get seen.
**Brands**
**27 **▲rising
**Sellers**
**36**
**Top-5 brand share**
**67%**
Top 20: 97%
**Top-5 click share**
**26%**
Top 20: 62%
**Open market**
**28%**
- Amazon Basics21% - York Fitness20% - Gallant11% - Chase Fitness8% - Amonax7% - Phoenix Fitness5%
## **Demand**
Weekly Amazon search volume, last 33 weeks — +0.9% search growth over the last 90 days.
3K2KDec '25Jan '26Feb '26Mar '26May '26Jun '26Jul '26
[**Open Trend **](https://flapen.com/research/uk/sports-outdoors/cast-iron-weights/trend)
## **Top cast iron weights search terms**
- **cast iron weights**21K/yr-11.4%0.6% conv. - **cast iron dumbbells set**19K/yr-7.7%1.4% conv. - **cast iron weight plates**14K/yr+0.2%0.7% conv. - **york weights**14K/yr+1.8%1.7% conv. - **metal weights**9K/yr+6.6%0.6% conv. - **york dumbbells set**9K/yr+10.3%1.1% conv. - **york weight plates**7K/yr+11.1%2.4% conv. - **cast iron dumbbells**6K/yr+9.7%1.3% conv. - **metal dumbbells set**6K/yr+8.8%0.8% conv. - **iron weights**4K/yr+30.3%0.7% conv. [**All search terms **](https://flapen.com/research/uk/sports-outdoors/cast-iron-weights/search-terms)
## **Top cast iron weights products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%2%£1K4%£3K6%£4K8%£6K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 24 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Gallant Weight Plates - 5kg Standard 1 Inch Vinyl Weights Discs 20kg Set For Men Women - Weight Plate Set for Lifting Dumbbells Barbell Home Gym Fitness Training Equipment (Black 5kg x 4)**Gallant**£20.26**4.6★658 rev](https://www.amazon.co.uk/dp/B0CXPZPH3M) [2**Amazon Basics Rubber Encased Hex Dumbbell Weights Set 10 kg Black**Amazon Basics**£29.79**4.6★736 rev](https://www.amazon.co.uk/dp/B0DMDNLJH9) [3**York Fitness 20 kg Cast Iron Spinlock Dumbbell - Adjustable Hand Weights Set (Pack of 2) - Black**York Fitness**£37.77**4.6★3,434 rev](https://www.amazon.co.uk/dp/B004ELB550) [4**York 4x 5kg Black Cast Iron 1Inch Plates**York Fitness**£37.85**4.8★1,246 rev](https://www.amazon.co.uk/dp/B0015UP91O) [5**Amazon Basics 2.5 cm Grip Weight Plates 10 kg Weight Single Charcoal**Amazon Basics**£16.29**4.7★320 rev](https://www.amazon.co.uk/dp/B0DNSGH9QR)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**SPORTNOW 2-in-1 Adjustable Dumbbells Set 20kg Cast Iron Dumbbells Set**SPORTNOW**£28.32**9 rev6mo ago](https://www.amazon.co.uk/dp/B0GKNQY495) [**Amazon Basics 2.5 cm Grip Weight Plates 10 kg Weight Single Charcoal**Amazon Basics**£16.29**320 rev10mo ago](https://www.amazon.co.uk/dp/B0DNSGH9QR) [**Amazon Basics 2.5 cm Grip Weight Plates 1.25 kg Weights Set of 4 Charcoal**Amazon Basics**£12.25**320 rev10mo ago](https://www.amazon.co.uk/dp/B0DNSHB5KX) [**Amazon Basics Rubber Encased Hex Dumbbell Weights Set 10 kg Black**Amazon Basics**£29.79**736 rev1y ago](https://www.amazon.co.uk/dp/B0DMDNLJH9) [**Amazon Basics Rubber Encased Hex Dumbbell Weights Set 6 kg Black**Amazon Basics**£20.04**736 rev1y ago](https://www.amazon.co.uk/dp/B0DMD159MN)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Amazon Basics Rubber Encased Hex Dumbbell Weights Set 6 kg Black**Amazon Basics**£20.04**4.6★**▲ 158%**](https://www.amazon.co.uk/dp/B0DMD159MN) [**Amazon Basics Rubber Encased Hex Dumbbell Weights Set 10 kg Black**Amazon Basics**£29.79**4.6★**▲ 149%**](https://www.amazon.co.uk/dp/B0DMDNLJH9) [**York Fitness Single Neoprene Hex coating Dumbbell Black 2KG**York Fitness**£5.15**4.4★**▲ 143%**](https://www.amazon.co.uk/dp/B0015UR5WK) [**Amazon Basics 2.5 cm Grip Weight Plates 10 kg Weight Single Charcoal**Amazon Basics**£16.29**4.7★**▲ 138%**](https://www.amazon.co.uk/dp/B0DNSGH9QR) [**Amazon Basics Rubber Encased Hex Dumbbell Weights Set 5 kg Black**Amazon Basics**£16.83**4.6★**▲ 137%**](https://www.amazon.co.uk/dp/B0DMDG9CC3)
**~~View all trending →~~**
## **What buyers say about cast iron weights**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**33%
*“Good quality set”*
**Value For Money**20%
*“Excellent value for money”*
**Weight Heavy**5%
*“Incredible weights”*
**Advertised Vs Actual Product**5%
*“As described”*
**Grip**4%
*“Comfortable grip”*
**Ease Of Use**4%
*“Easy to use”*
**Weight Light**3%
*“Great starter weights with detachable weights so start light then add more to heavier - great idea”*
**Size-Overall**3%
*“not too snuggly”*
**Durability**2%
*“Durable product”*
**Adjustability/Rotatability/Reclining**2%
*“Adjustable”*
### **What buyers complain about **
**Smell**13%
*“Bad smell”*
**Weight Heavy**10%
*“I also think maybe its slightly heavier than actual 8kg”*
**Quality-Overall**9%
*“Very Garbage”*
**Size-Overall**8%
*“bigger than I thought”*
**Value For Money**4%
*“But costly”*
**Durability**4%
*“Broke after a month”*
**Product Condition**4%
*“Arrived dirty, damaged and looked like they had been used and not new”*
**Strength**3%
*“Join in middle weak”*
**Defective Material/Parts**2%
*“Broken piece”*
**Advertised Vs Actual Product**2%
*“The description says 20kg but 17kg in actual.”*
### **Top return reasons **
**Size-Overall**28%
**Weight Heavy**17%
**Defective Material/Parts**9%
**Advertised Vs Actual Product**5%
**Quality-Overall**5%
**Compatibility-Overall**4%
**Smell**4%
**Weight Light**3%
**Product Condition**3%
**Functionality-Overall**2%
## **Common questions**
- **Is cast iron weights profitable to sell on Amazon United Kingdom?**
- The niche generates £69K/yr across 65 tracked products. 3 of 8 products launched in the last 360 days are still selling. 90-day search growth is +0.9%. Flapen's verdict: Worth a look (51/100).
- **How competitive is the cast iron weights niche?**
- 27 brands and 36 sellers compete. The top 5 products take 26% of clicks and top 5 brands hold 67% of demand.
- **What do buyers complain about in cast iron weights?**
- Top complaints mined from reviews: Smell, Weight Heavy, Quality-Overall. The return rate is 0.3%.
- **What does it cost to enter the cast iron weights niche?**
- Listings span £5.15–£175.38; the average listing price is £39.59 (sweet spot $15–$100). The average incumbent carries 970 reviews — the moat a new listing must climb.
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