Is liner puller profitable to sell on Amazon United States?

The niche generates $100K/yr across 11 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -23.2%. Flapen's verdict: Skip it (39/100).

How competitive is the liner puller niche?

10 brands and 29 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 88% of demand.

What do buyers complain about in liner puller?

Top complaints mined from reviews: Quality-Overall, Ease Of Use, Functionality-Overall. The return rate is 2.3%.

When does demand for liner puller peak?

Demand peaks in Apr; the busiest month runs 1.9× the quietest.

What does it cost to enter the liner puller niche?

Listings span $13.71–$554.64; the average listing price is $137.31 (sweet spot $15–$100). The average incumbent carries 204 reviews — the moat a new listing must climb.

liner puller

Skip it

A concentrated shelf (top 5 take 88% of clicks) — this niche doesn't clear our bar today.

Review moat

Great203.91

avg incumbent reviews — the moat a new listing must climb

Quality gap

Great4.2★

avg incumbent rating — lower means beatable quality

Returns

Good2.3%

return rate — above 5% kills the launch gate

Avg price

Good$137.31

avg listing price — sweet spot $15–$100

Conversion

Good4.8%

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

Brand share

Okay88%

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

Market size

Okay$100K

$100K/yr · 15K searches

Price range

Bad$13.71–$554.64

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

Growth

Bad-23.2%

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

Competition

Bad88%

top-5 click share — a locked-up shelf

Signals Low Review Barrier High Price

According to Flapen's Amazon United States niche tracking, liner puller is a $100K/yr Amazon United States market (15K searches/yr). The top 5 brands hold 88% of demand. Demand peaks in Apr. Verdict: Skip it — 39/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

liner puller market data

Units sold / yr: 500–750; avg 0–100/product
Revenue / yr: $69K–$103K; units × avg price
Conversion rate: 4.8%
Avg BSR: #177
Page quality: 0%
Prime: 91%
Sponsored: 82%
Out of stock: 0.0%
Avg brand age: 36 months
Avg seller age: 196 days

Competition & brand share

The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.

Brands

10 falling

Sellers

Top-5 brand share

88%

Top 20: 100%

Top-5 click share

88%

Top 20: 100%

Open market

VEVOR38%
Bonbo35%
Runant5%
SCBoutique5%
Debialo5%
OTC3%
Open — no brand owns it (4 brands, 9%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -23.2% search growth over the last 90 days.

Peak months: Apr · busiest ÷ quietest = 1.9×

Open Trend

Top liner puller search terms

cylinder liner puller6K/yr -22.1%5.1% conv.
sleeve puller5K/yr -23.8%2.8% conv.
liner puller4K/yr -24.4%5.8% conv.

All search terms

Top liner puller 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★)

All 11 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Universal Cylinder Liner Puller Assembly Fits for Mack Cummins CAT Caterpillar Works on Heavy Duty Diesel Engines Wet Liners from 3-7/8 to 6-1/4 Bore Comparable to PT-6400-C M50010-B 3376015

Bonbo$138.234.5★156 rev

VEVOR Liner Puller Cylinder Liner Puller Diesel Engines Liner Puller Tool Both Dry-Type and Wet-Type Fit Diameter of 75 mm-138 mm Universal Cylinder Liner Puller Tool Set for Auto Repair

VEVOR$56.124.2★237 rev

VEVOR Universal Cylinder Liner Puller Assembly Used for Mack Cummins Cat on Wet Liner from 3-7/8 in to 6-1/4 in Bore Diesel Engine Cylinder Liner Removal Tool Replace PT-6400-C M50010-B 3376015

VEVOR$89.585.0★12 rev

Runant Universal Cylinder Liner Puller Assembly for Mack Cummins CAT Caterpillar Heavy Duty Engine Liner Puller Tool Fits 3-7/8 to 6-1/4 Bore Replaces PT-6400-C M50010-B 3376015

Runant$135.875.0★2 rev

SCBoutique Universal Cylinder Liner Puller for Cummins CAT Mack 3-7/8 to 6-1/4 Bore Diesel Engines - Replaces PT-6400-C M50010-B (Engine Puller)

SCBoutique$140.365.0★3 rev

Newest

by launch date

15T Hydraulic Cylinder Liner Puller Tool Universal Cylinder Sleeve Removal Kit for 3.15-5.51 Inner Diameter Dry & Wet Type Liner Puller for Automotive & Heavy Equipment Maintenance

IOENC$93.741 rev

7mo ago

SCBoutique Universal Cylinder Liner Puller for Cummins CAT Mack 3-7/8 to 6-1/4 Bore Diesel Engines - Replaces PT-6400-C M50010-B (Engine Puller)

SCBoutique$140.363 rev

10mo ago

VEVOR Universal Cylinder Liner Puller Assembly Used for Mack Cummins Cat on Wet Liner from 3-7/8 in to 6-1/4 in Bore Diesel Engine Cylinder Liner Removal Tool Replace PT-6400-C M50010-B 3376015

VEVOR$89.5812 rev

11mo ago

Runant Universal Cylinder Liner Puller Assembly for Mack Cummins CAT Caterpillar Heavy Duty Engine Liner Puller Tool Fits 3-7/8 to 6-1/4 Bore Replaces PT-6400-C M50010-B 3376015

Runant$135.872 rev

1y ago

Vorhixa 6 Pcs Plumbing Tools Kit with Angle Stop Wrench & 1/2-Inch Compression Sleeve Puller Professional Plumbers Wrench Sandpaper and Storage Bag for Frozen/Corroded Angle Stop

Vorhixa$29.42230 rev

1y ago

What buyers say about liner puller

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

What buyers love

Ease Of Use24%

“its easy to use”

Quality-Overall22%

“Excellent product”

Advertised Vs Actual Product15%

“As Advertised”

Value For Money12%

“great value for the money”

Durability4%

“I like that it was the metal tool was well made and durable”

Adjustability/Rotatability/Reclining3%

“Extremely heavy duty and adjustable”

Design-Overall3%

“Good design, works perfectly”

Pressure2%

“giving you controlled pressure instead of forcing anything”

Strength2%

“Very sturdy”

Efficiency2%

“Works well”

What buyers complain about

Quality-Overall28%

“Poor quality control”

Ease Of Use17%

“Not so easy to use”

Functionality-Overall13%

“it wouldn't work”

Advertised Vs Actual Product9%

“the picture is very deceiving”

Add-Ons/Attachments7%

“The clamps don't stay close”

Weight Heavy5%

“It's heavy so make sure to cover your crank before adjusting it to your sleeve length so not to hit or ding anything”

Durability4%

“Broke right away”

Size-Overall1%

“The tool is also not very large”

Top return reasons

Size-Overall32%

Functionality-Overall14%

Defective Material/Parts11%

Compatibility-Overall7%

Value For Money6%

Advertised Vs Actual Product6%

Durability5%

Mechanism Issues3%

Quality-Overall2%

Maintenance And Repair2%

Common questions

Is liner puller profitable to sell on Amazon United States?: The niche generates $100K/yr across 11 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is -23.2%. Flapen's verdict: Skip it (39/100).
How competitive is the liner puller niche?: 10 brands and 29 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 88% of demand.
What do buyers complain about in liner puller?: Top complaints mined from reviews: Quality-Overall, Ease Of Use, Functionality-Overall. The return rate is 2.3%.
When does demand for liner puller peak?: Demand peaks in Apr; the busiest month runs 1.9× the quietest.
What does it cost to enter the liner puller niche?: Listings span $13.71–$554.64; the average listing price is $137.31 (sweet spot $15–$100). The average incumbent carries 204 reviews — the moat a new listing must climb.