Is kobalt 40v trimmer head replacement profitable to sell on Amazon United States?

The niche generates $22K/yr across 21 tracked products. 2 of 8 products launched in the last 360 days are still selling. 90-day search growth is +157.8%. Flapen's verdict: Worth a look (54/100).

How competitive is the kobalt 40v trimmer head replacement niche?

12 brands and 52 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 82% of demand.

What do buyers complain about in kobalt 40v trimmer head replacement?

Top complaints mined from reviews: Size-Overall, Durability, Ease Of Use. The return rate is 4.7%.

What does it cost to enter the kobalt 40v trimmer head replacement niche?

Listings span $11.28–$36.43; the average listing price is $22.80 (sweet spot $15–$100). The average incumbent carries 329 reviews — the moat a new listing must climb.

kobalt 40v trimmer head replacement

Worth a look

Shows beatable incumbent ratings (3.7★), but a small market ($22K/yr) keeps it on the watch list.

Quality gap

Incredible3.7★

avg incumbent rating — lower means beatable quality

Growth

Incredible+157.8%

90-day search growth — must beat 0% to launch

Avg price

Incredible$22.80

avg listing price — sweet spot $15–$100

Review moat

Great328.76

avg incumbent reviews — the moat a new listing must climb

Price range

Great$11.28–$36.43

cheapest to priciest tracked listing — scored on the share inside $15–$100

Competition

Okay59%

top-5 click share — leaders hold, buyers still browse

Brand share

Okay82%

top-5 brand share — brands hold most of the demand

Conversion

Okay2.4%

search→purchase rate — share of searches ending in a sale

Returns

Okay4.7%

return rate — above 5% kills the launch gate

Market size

Bad$22K

$22K/yr · 40K searches

According to Flapen's Amazon United States niche tracking, kobalt 40v trimmer head replacement is a $22K/yr Amazon United States market (40K searches/yr). The top 5 brands hold 82% of demand. Verdict: Worth a look — 54/100.

Data updated Jul 16, 2026 · scored weekly · How we score niches

kobalt 40v trimmer head replacement market data

Units sold / yr: 1K–1K; avg 0–100/product
Revenue / yr: $23K–$29K; units × avg price
Conversion rate: 2.4%
Avg BSR: #1,349
Page quality: 0%
Prime: 95%
Sponsored: 86%
Out of stock: 6.7%
Avg brand age: 35 months
Avg seller age: 146 days

Competition & brand share

The top 5 products take 59% of clicks — established leaders, but buyers still shop beyond them.

Brands

12 falling

Sellers

Top-5 brand share

82%

Top 20: 100%

Top-5 click share

59%

Top 20: 100%

Open market

14%

Eyoloty28%
Kaberalty17%
Katifee15%
THTEN13%
WEED WARRIOR9%
Uietuc4%
Open — no brand owns it (6 brands, 14%)

Top kobalt 40v trimmer head replacement search terms

kobalt 40v string trimmer replacement head17K/yr +198.6%1.4% conv.
kobalt 40v replacement head7K/yr +92.4%1.1% conv.
kobalt 40v trimmer head replacement12K/yr +97.3%1.7% conv.
kobalt 40v trimmer head4K/yr +358.2%1.2% conv.

All search terms

Top kobalt 40v trimmer head replacement 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.

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)1 product missing review or click data not plotted

All 21 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

KTHA 1040-03 Weed Eater Head Replacement Compatible with Kobalt 80V KST 1680-06 40V KST 2540-06 KST 1040A-03 24V KST 224A-03 KST 224B-03 Cordless String Trimmer with 0.080 17 Ft Pre-Cut Dual Line

Eyoloty$24.323.1★37 rev

Kaberalty KTHA1040-03 KST2580-06 4665020 Replacement Trimmer Head Compatible with Kobalt KST224A-03 KST224B-03 KST1040A-03 KMS1040A-03 KST2540-06 KST1540-06 with 0.080 precut line

Kaberalty$24.833.4★19 rev

KST2580-06 KTHA1040-03 Replacement Trimmer Head Bump Knob Accessory Compatible with Kobalt 40V KST1040A-03 KST1040B-03 KST1540-06 KST224A-03 KST224B-03 KST2540-06 String Trimmers 4Pack

Katifee$21.004.4★12 rev

Weed Warrior Autowinder II Universal Fit String Trimmer Replacement Bump Head

WEED WARRIOR$24.834.0★1,953 rev

Eyoloty KST 120X KST 120X-06 Replacement Trimmer Head Compatible with Kobalt 40-Volt Max KST 2040-06 KDLA 3040-03 Weed Eater with 14 Pack Quickload Blades & 8 Pack 0.12 Flexible Line Parts (30 Pack)

Eyoloty$25.832.5★57 rev

Newest

by launch date

KST-130X Replacement String Trimmer Head for Kobalt 40-Volt 1-Pack

VinneMOO$35.660 rev

1mo ago

Katifee KST-130X Replacement String Trimmer Head for Kobalt 40-Volt String Trimmer Models KST 130X-06 and KST 130X String Trimmer 0.080-inch 1-Pack

Katifee$36.432 rev

1mo ago

KTHA 1040-03 Weed Eater Head Replacement Compatible with Kobalt 80V KST 1680-06 40V KST 2540-06 KST 1040A-03 24V KST 224A-03 KST 224B-03 Cordless String Trimmer with 0.080 17 Ft Pre-Cut Dual Line

Eyoloty$24.3237 rev

3mo ago

Kaberalty KTHA1040-03 KST2580-06 4665020 Replacement Trimmer Head Compatible with Kobalt KST224A-03 KST224B-03 KST1040A-03 KMS1040A-03 KST2540-06 KST1540-06 with 0.080 precut line

Kaberalty$24.8319 rev

3mo ago

PEHUAP Trimmer Head Replacement Fits Kobalt 24V 12 inch String Trimmer

PEHUAP$23.752 rev

4mo ago

What buyers say about kobalt 40v trimmer head replacement

What buyers praise and complain about, mined from review topics.

What buyers love

Size-Overall35%

“Direct fit”

Assembly/Installation10%

“make it work to install”

Advertised Vs Actual Product7%

“Works as expected”

Cutting/Trimming6%

“has been cutting through grass”

Ease Of Use6%

“Quick & easy”

Quality-Overall6%

“Excellent quality and very easy to install”

Value For Money6%

“offers great value for the price”

Durability3%

“Works really well very durable”

Functionality-Overall2%

“They work perfectly fine in my trimmers”

Material Quality2%

“The plastic seems to be the same quality”

What buyers complain about

Size-Overall22%

“Does not fit out of the box”

Durability12%

“Broke after 1 use”

Ease Of Use11%

“Difficult to operate”

Advertised Vs Actual Product8%

“False Advertsing”

Assembly/Installation7%

“While it was a bit tricky to get apart during installation”

Quality-Overall6%

“Absolutely terrible product”

Defective Material/Parts3%

“But again like I said I was able to use 3 pieces from the broken one”

Value For Money3%

“definitely not worth $20”

Functionality-Overall3%

“Cannot get it to snap on my Kobalt trimmer”

Cutting/Trimming2%

“I hate string trimmers”

Top return reasons

Size-Overall61%

Advertised Vs Actual Product13%

Defective Material/Parts6%

Functionality-Overall6%

Add-Ons/Attachments3%

Assembly/Installation3%

Durability2%

Mechanism Issues1%

Mounting1%

Cutting/Trimming1%

Common questions

Is kobalt 40v trimmer head replacement profitable to sell on Amazon United States?: The niche generates $22K/yr across 21 tracked products. 2 of 8 products launched in the last 360 days are still selling. 90-day search growth is +157.8%. Flapen's verdict: Worth a look (54/100).
How competitive is the kobalt 40v trimmer head replacement niche?: 12 brands and 52 sellers compete. The top 5 products take 59% of clicks and top 5 brands hold 82% of demand.
What do buyers complain about in kobalt 40v trimmer head replacement?: Top complaints mined from reviews: Size-Overall, Durability, Ease Of Use. The return rate is 4.7%.
What does it cost to enter the kobalt 40v trimmer head replacement niche?: Listings span $11.28–$36.43; the average listing price is $22.80 (sweet spot $15–$100). The average incumbent carries 329 reviews — the moat a new listing must climb.