---
title: "D Lock — £455K/yr Amazon UK Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/uk/sports-outdoors/d-lock"
last_updated: "2026-07-31T14:17:32.668Z"
locale: en
meta:
description: "Niche score 52/100 · £455K/yr market. Brand-locked demand (top 5 brands take 90% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · £455K/yr market. Brand-locked demand (top 5 brands take 90% of clicks) keeps it on the watch list. Data updated Jul 2026."
"og:title": "D Lock — £455K/yr Amazon UK Niche (2026) - Flapen"
---
# **d lock**
**Worth a look**
Shows a sweet-spot price point ($25.86 avg), but brand-locked demand (top 5 brands take 90% of clicks) keeps it on the watch list.
Market size 58Growth 38Conversion 61Competition 42Returns 75Price range 85Avg price 95Brand share 25Review moat 31Quality gap 47
**Avg price**
**Incredible****£25.86**
avg listing price — sweet spot $15–$100
**Price range**
**Great****£6.86–£73.42**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Returns**
**Great****2.0%**
return rate — above 5% kills the launch gate
**Conversion**
**Good****5.3%**
search→purchase rate — share of searches ending in a sale
**Market size**
**Good****£455K**
£455K/yr · 330K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Okay****60%**
top-5 click share — leaders hold, buyers still browse
**Growth**
**Okay****+10.3%**
90-day search growth — must beat 0% to launch
**Review moat**
**Okay****3,403.43**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Bad****90%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United Kingdom niche tracking, d lock is a £455K/yr Amazon United Kingdom market (330K searches/yr). The top 5 brands hold 90% of demand. Demand peaks in Sep. Verdict: Worth a look — 52/100.
Data updated Jul 29, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **d lock market data**
- **Units sold / yr**
- **15K–20K**
- avg 500–750/product
- **Revenue / yr**
- **£388K–£517K**
- units × avg price
- **Conversion rate**
- **5.3%**
- **Avg BSR**
- **#15**
- **Page quality**
- **0%**
- **Prime**
- **95%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **57 months**
- **Avg seller age**
- **182 days**
## **Competition & brand share**
The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**9 **▼falling
**Sellers**
**39**
**Top-5 brand share**
**90%**
Top 20: 100%
**Top-5 click share**
**60%**
Top 20: 99%
**Open market**
**7%**
- Kryptonite64% - Sportneer13% - Burg-Wachter6% - NDakter4% - Sterling4% - Byking3% - Open — no brand owns it (3 brands, 7%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +10.3% search growth over the last 90 days.
10K6KSpike '25Spike '26Prime Day '26 seasonSepDecMarJunAugNovMarMay
Peak months: Sep · busiest ÷ quietest = 1.9×
[**Open Trend **](https://flapen.com/research/uk/sports-outdoors/d-lock/trend)
## **Top d lock search terms**
- **kryptonite bike lock**86K/yr+17.7%5.1% conv. - **d lock**46K/yr+6.7%5.0% conv. - **d locks for bicycles**44K/yr+10.2%5.9% conv. - **bike d lock**26K/yr+11.8%5.7% conv. - **u lock bike lock**12K/yr+7.7%4.5% conv. - **u lock**14K/yr+2.4%2.3% conv. - **bike u lock**13K/yr+12.1%3.6% conv. - **kryptonite lock**14K/yr-15.9%3.2% conv. - **d lock bike**10K/yr+38.4%5.6% conv. - **kryptonite**9K/yr+8.6%1.8% conv. [**All search terms **](https://flapen.com/research/uk/sports-outdoors/d-lock/search-terms)
## **Top d lock 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%10%£45K20%£91K30%£136K40%£182K1101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 21 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Kryptonite Keeper Bike U-Lock Standard with Braided Steel Cable Heavy Duty Anti-Theft Bicycle U Lock 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys**Kryptonite**£22.94**4.4★5,337 rev](https://www.amazon.co.uk/dp/B07GSHZP39) [2**Kryptonite Evolution Mini-7 Bike U-Lock with Cable Heavy Duty Anti-Theft Bicycle U Lock 13mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys**Kryptonite**£36.78**4.5★14,063 rev](https://www.amazon.co.uk/dp/B06XZT8KZ1) [3**Sportneer Bike Lock: 17mm Heavy Duty Bike D Lock with 5Ft/1.2M High Security Steel Cable&Sturdy Mounting Bracket&Key Anti Theft Bicycle Locks for Road Bike Electric Bike Mountain Bike Folding Bike**Sportneer**£14.50**4.5★2,584 rev](https://www.amazon.co.uk/dp/B0819CW6FJ) [4**Kryptonite Keeper 12 Standard with Bracket Black**Kryptonite**£15.48**4.4★3,177 rev](https://www.amazon.co.uk/dp/B000BL1P3O) [5**Kryptonite Evolution Standard Bike U-Lock Heavy Duty Anti-Theft Bicycle U Lock 14mm Shackle with Mounting Bracket and Keys High Security Lock for Bicycles Scooters**Kryptonite**£42.47**4.4★4,196 rev](https://www.amazon.co.uk/dp/B06XCP8Y8S)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Burg Wachter 200D 16mm Heavy Duty D-Lock Padlock Sold Secure Diamond & Gold Rated Bike & Motorcycle Ebike Scooter Security Lock**Burg-Wachter**£11.65**100 rev6mo ago](https://www.amazon.co.uk/dp/B0GHNQ59KR) [**BYKING Bike Lock Heavy Duty Bicycle D Lock with Cable 3 High-Security Keys and 1.2m Steel Cable for Road Electric Folding Mountain Bike and Scooter.**Byking**£12.55**89 rev1y ago](https://www.amazon.co.uk/dp/B0F5RJHW71) [**G4GADGET Heavy Duty D Lock for Bike High-Security Bicycle U Lock with 2 Keys Anti-Theft Steel Shackle Weatherproof & Durable Ideal for Road Mountain Electric & Folding Bikes**G4GADGET**£10.91**4 rev1y ago](https://www.amazon.co.uk/dp/B0DW22MTDZ) [**Sportneer Bike Lock 18mm Heavy Duty Bike U Lock Plus Size with Adjustable Mounting Bracket&Key Anti Theft Secure Locks for Bikes (U Lock)**Sportneer**£14.29**147 rev1y ago](https://www.amazon.co.uk/dp/B0DC68V76R) [**Sterling 320mm Heavy Duty Bike D Lock**Sterling**£6.86**163 rev2y ago](https://www.amazon.co.uk/dp/B0CNXTYV31)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**NDakter Bike Locks 18mm Shackle Heavy Duty Bike D Lock with 6FT/1.8M Steel Security Cable with 3 Keys Anti Theft Bicycle Lock for Electric Scooter Motorbike Dirt-Bike E Bike Road Bike Lock Sturdy**NDakter**£21.04**4.7★**▲ 217%**](https://www.amazon.co.uk/dp/B0BS3SZVND) [**G4GADGET Heavy Duty D Lock for Bike High-Security Bicycle U Lock with 2 Keys Anti-Theft Steel Shackle Weatherproof & Durable Ideal for Road Mountain Electric & Folding Bikes**G4GADGET**£10.91**4.7★**▲ 201%**](https://www.amazon.co.uk/dp/B0DW22MTDZ) [**Kryptonite Keeper Bike U-Lock Standard with Braided Steel Cable Heavy Duty Anti-Theft Bicycle U Lock 12mm Shackle and 10mm x4ft Length Security Cable with Mounting Bracket and Keys**Kryptonite**£22.94**4.4★**▲ 87%**](https://www.amazon.co.uk/dp/B07GSHZP39) [**Sportneer Bike Lock 18mm Heavy Duty Bike U Lock Plus Size with Adjustable Mounting Bracket&Key Anti Theft Secure Locks for Bikes (U Lock)**Sportneer**£14.29**4.5★**▲ 59%**](https://www.amazon.co.uk/dp/B0DC68V76R) [**Burg Wachter 200D 16mm Heavy Duty D-Lock Padlock Sold Secure Diamond & Gold Rated Bike & Motorcycle Ebike Scooter Security Lock**Burg-Wachter**£11.65**4.4★**▲ 49%**](https://www.amazon.co.uk/dp/B0GHNQ59KR)
**~~View all trending →~~**
## **What buyers say about d lock**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Locking Mechanism**24%
*“Lock is great”*
**Quality-Overall**20%
*“Excellent product”*
**Value For Money**13%
*“Amazing value”*
**Strength**11%
*“Solid construction, seems great 👍🏻 The lock seems to be of a solid construction, it's sturdy and has a decent weight”*
**Ease Of Use**6%
*“Easy to use”*
**Advertised Vs Actual Product**4%
*“Just what I wanted”*
**Size-Overall**4%
*“Just fit my childs bike”*
**Security**2%
*“Great lock”*
**Weight Heavy**2%
*“heavy duty”*
**Durability**1%
*“it's a durable”*
### **What buyers complain about **
**Durability**14%
*“Broke on the first use”*
**Weight Heavy**12%
*“heavy lock”*
**Quality-Overall**11%
*“Not reliable at all”*
**Locking Mechanism**11%
*“The worst U lock”*
**Size-Overall**9%
*“The holder doesnt fit”*
**Value For Money**7%
*“the prices on Amazon are more expensive in other places the cheapest price”*
**Rusts/Corrodes**5%
*“The lock is rusty after two months although I took good care of it”*
**Add-Ons/Attachments**3%
*“I could not find a place to attached it”*
**Advertised Vs Actual Product**3%
*“Key not as advertised”*
**Strength**2%
*“Easily breakable”*
### **Top return reasons **
**Size-Overall**54%
**Weight Heavy**13%
**Locking Mechanism**5%
**Functionality-Overall**3%
**Compatibility-Overall**3%
**Defective Material/Parts**3%
**Mounting**3%
**Quality-Overall**2%
**Value For Money**1%
**Add-Ons/Attachments**1%
## **Common questions**
- **Is d lock profitable to sell on Amazon United Kingdom?**
- The niche generates £455K/yr across 21 tracked products. 1 of 1 products launched in the last 360 days are still selling. 90-day search growth is +10.3%. Flapen's verdict: Worth a look (52/100).
- **How competitive is the d lock niche?**
- 9 brands and 39 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 90% of demand.
- **What do buyers complain about in d lock?**
- Top complaints mined from reviews: Durability, Weight Heavy, Quality-Overall. The return rate is 2.0%.
- **When does demand for d lock peak?**
- Demand peaks in Sep; the busiest month runs 1.9× the quietest.
- **What does it cost to enter the d lock niche?**
- Listings span £6.86–£73.42; the average listing price is £25.86 (sweet spot $15–$100). The average incumbent carries 3,403 reviews — the moat a new listing must climb.
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