d lock
Worth a lookShows 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.
Avg price
Incredible£25.86avg listing price — sweet spot $15–$100
Price range
Great£6.86–£73.42cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Great2.0%return rate — above 5% kills the launch gate
Conversion
Good5.3%search→purchase rate — share of searches ending in a sale
Market size
Good£455K£455K/yr · 330K searches
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay60%top-5 click share — leaders hold, buyers still browse
Growth
Okay+10.3%90-day search growth — must beat 0% to launch
Review moat
Okay3,403.43avg incumbent reviews — the moat a new listing must climb
Brand share
Bad90%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
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.Peak months: Sep · busiest ÷ quietest = 1.9×
Top d lock search terms
- kryptonite bike lock86K/yr
- d lock46K/yr
- d locks for bicycles44K/yr
- bike d lock26K/yr
- u lock bike lock12K/yr
- u lock14K/yr
- bike u lock13K/yr
- kryptonite lock14K/yr
- d lock bike10K/yr
- kryptonite9K/yr
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.
All 21 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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£22.944.4★5,337 rev
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£36.784.5★14,063 rev
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£14.504.5★2,584 rev
Kryptonite Keeper 12 Standard with Bracket Black
Kryptonite£15.484.4★3,177 rev
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£42.474.4★4,196 rev
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£11.65100 rev
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£12.5589 rev
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£10.914 rev
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£14.29147 rev
Sterling 320mm Heavy Duty Bike D Lock
Sterling£6.86163 rev
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£21.044.7★
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£10.914.7★
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£22.944.4★
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£14.294.5★
Burg Wachter 200D 16mm Heavy Duty D-Lock Padlock Sold Secure Diamond & Gold Rated Bike & Motorcycle Ebike Scooter Security Lock
Burg-Wachter£11.654.4★
What buyers say about d lock
What buyers praise and complain about, mined from review topics.What buyers love
“Lock is great”
“Excellent product”
“Amazing value”
“Solid construction, seems great 👍🏻 The lock seems to be of a solid construction, it's sturdy and has a decent weight”
“Easy to use”
“Just what I wanted”
“Just fit my childs bike”
“Great lock”
“heavy duty”
“it's a durable”
What buyers complain about
“Broke on the first use”
“heavy lock”
“Not reliable at all”
“The worst U lock”
“The holder doesnt fit”
“the prices on Amazon are more expensive in other places the cheapest price”
“The lock is rusty after two months although I took good care of it”
“I could not find a place to attached it”
“Key not as advertised”
“Easily breakable”
Top return reasons
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.