combination u lock
Skip itA small market ($48K/yr) — this niche doesn't clear our bar today.
Avg price
Incredible$30.78avg listing price — sweet spot $15–$100
Price range
Great$13.10–$76.70cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good5.8%search→purchase rate — share of searches ending in a sale
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Growth
Good+30.3%90-day search growth — must beat 0% to launch
Review moat
Okay1,852.23avg incumbent reviews — the moat a new listing must climb
Returns
Okay3.5%return rate — above 5% kills the launch gate
Competition
Okay64%top-5 click share — leaders hold, buyers still browse
Brand share
Okay89%top-5 brand share — brands hold most of the demand
Market size
Bad$48K$48K/yr · 27K searches
According to Flapen's Amazon United States niche tracking, combination u lock is a $48K/yr Amazon United States market (27K searches/yr). The top 5 brands hold 89% of demand. Demand peaks in Aug–Sep. Verdict: Skip it — 47/100.
Data updated Jul 24, 2026 · scored weekly · How we score niches
combination u lock market data
- Units sold / yr
- 2K–3K
- avg 0–100/product
- Revenue / yr
- $62K–$77K
- units × avg price
- Conversion rate
- 5.8%
- Avg BSR
- #76
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 100%
- Out of stock
- 1.5%
- Avg brand age
- 47 months
- Avg seller age
- 181 days
Competition & brand share
The top 5 products take 64% of clicks — established leaders, but buyers still shop beyond them.Brands
12 falling
Sellers
28
Top-5 brand share
89%
Top 20: 100%
Top-5 click share
64%
Top 20: 98%
Open market
9%
- Kryptonite60%
- NDakter14%
- USHAKE9%
- Febabilo3%
- HAKSEIFA3%
- Diyife2%
- Open — no brand owns it (6 brands, 9%)
Demand & seasonality
Weekly Amazon search volume, last 102 weeks — +30.3% search growth over the last 90 days.Peak months: Aug, Sep · busiest ÷ quietest = 3.3×
Top combination u lock search terms
- combination u lock7K/yr
- bike u lock combination6K/yr
- u lock combination7K/yr
- kryptonite keeper 7853K/yr
- kryptonite bike lock combination4K/yr
Top combination u 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 22 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Kryptonite Combo Bike U-Lock Standard Anti-Theft Security Bicycle Lock 12mm Steel Shackle 4-Digit Resettable Combination U Lock for Scooter Road Mountain Bikes
Kryptonite$20.274.3★1,035 rev
Kryptonite Keeper 785 Bike Chain Lock 2.8 Feet Long Heavy Duty Anti-Theft Bicycle Chain Lock with Keys for Bike Motorcycle Scooter Bicycle Door Gate Fence
Kryptonite$44.764.6★11,392 rev
USHAKE Bike Combination U Lock Heavy Duty Bike Combination U Lock Paddle Lock for Bicycle Electric Scooter Motorcycles Metal Fence Gate Anti Theft
USHAKE$23.094.4★1,530 rev
NDakter Bike Locks Heavy Duty Anti Theft Combo Bike U Lock 4-Digit Resettable Combination Bicycle Lock Large U Shaped Ebike Lock with 5Ft Steel Cable for Electric Bike Escooter Motorcycle Door
NDakter$27.084.5★932 rev
Kryptonite KryptoLok Combo Bike U-Lock Anti-Theft Security 12.7mm Steel Shackle 4-Digit Resettable Combination U-Shape Black
Kryptonite$56.843.9★197 rev
Newest
by launch date
NDakter Bike Locks Heavy Duty Anti Theft 18mm Bicycle Combo U Lock 4-Digit Resettable Combination Lock with 5FT Steel Cable and Bracket for Electric Scooter Ebike Motorcycle (Gray)
NDakter$27.50185 rev
Diyife 18mm Combination Bike U Lock Large Bike Lock Heavy Duty Anti Theft with 5FT Steel Cable 4-Digit Security Bicycle Lock with Keys and Mounting Bracket for Ebike Scooter Motorcycle 10.24x7.1
Diyife$27.17749 rev
AXA Combo 8 Bike U-Lock Heavy Duty Anti-Theft 12 mm Hardened Steel Shackle U Lock with 4-Digit Resettable Combination Compact & Portable Scratch-Resistant Security for Scooters & Mountain Bikes
AXA$21.5019 rev
Bike Lock Black Heavy Duty Anti Theft Bike U Locks Upgraded High Security 5 Digit Resettable Combination Password Bicycle U-Lock 17.4mm Thicken Steel Shackle Locks for Electric Bike Scooter Motorcycle
HAKSEIFA$13.1020 rev
Febabilo Bike Locks Heavy Duty Anti Theft Combo Bike U Lock 4-Digit Resettable Combination E-Bike Large U Shaped Lock with 5Ft Steel Cable for Electric Bike Bicycle Escooter Motorcycle Door
Febabilo$27.62245 rev
Trending
90-day click momentum
NDakter Bike Locks Heavy Duty Anti Theft Combo Bike U Lock 4-Digit Resettable Combination Bicycle Lock Large U Shaped Ebike Lock for Electric Bike Escooter Motorcycle Door
NDakter$22.674.5★
NDakter Bike Locks Heavy Duty Anti Theft 18mm Bicycle Combo U Lock 4-Digit Resettable Combination Lock with 5FT Steel Cable and Bracket for Electric Scooter Ebike Motorcycle (Gray)
NDakter$27.504.5★
Diyife 18mm Combination Bike U Lock Large Bike Lock Heavy Duty Anti Theft with 5FT Steel Cable 4-Digit Security Bicycle Lock with Keys and Mounting Bracket for Ebike Scooter Motorcycle 10.24x7.1
Diyife$27.174.5★
AXA Combo 8 Bike U-Lock Heavy Duty Anti-Theft 12 mm Hardened Steel Shackle U Lock with 4-Digit Resettable Combination Compact & Portable Scratch-Resistant Security for Scooters & Mountain Bikes
AXA$21.504.5★
Master Lock Black Bike Lock with Key Standard Size U-Lock for Bicycles and Other Outdoor Equipment Anti-Theft Lock for Bikes 8320D
Master Lock$13.134.5★
What buyers say about combination u lock
What buyers praise and complain about, mined from review topics.What buyers love
“reliable product”
“the provided cable seems very strong”
“Opens easy”
“Easy, fast locking and unlocking”
“Great value”
“Heavy duty”
“AS advertised”
“Had it for years”
“For the price it's a pretty decent U lock”
“Perfect size”
What buyers complain about
“The bracket could be bigger”
“awkward locking mechanism”
“3 months later it broke”
“very poor quality item”
“very bulky”
“proves to be a little difficult to use sometimes”
“This is pretty expensive to suck”
“The cable is Very thick”
“Does not work”
“wish it had the strength without all the weight”
Top return reasons
Common questions
- Is combination u lock profitable to sell on Amazon United States?
- The niche generates $48K/yr across 22 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +30.3%. Flapen's verdict: Skip it (47/100).
- How competitive is the combination u lock niche?
- 12 brands and 28 sellers compete. The top 5 products take 64% of clicks and top 5 brands hold 89% of demand.
- What do buyers complain about in combination u lock?
- Top complaints mined from reviews: Size-Overall, Locking Mechanism, Durability. The return rate is 3.5%.
- When does demand for combination u lock peak?
- Demand peaks in Aug–Sep; the busiest month runs 3.3× the quietest.
- What does it cost to enter the combination u lock niche?
- Listings span $13.10–$76.70; the average listing price is $30.78 (sweet spot $15–$100). The average incumbent carries 1,852 reviews — the moat a new listing must climb.