liner puller
Skip itA concentrated shelf (top 5 take 88% of clicks) — this niche doesn't clear our bar today.
Review moat
Great203.91avg 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 6% kills the launch gate
Avg price
Good$137.31avg 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–$554.64cheapest 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
Competition
The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
29
Top-5 brand share
88%
Open market
9%
- VEVOR38%
- Bonbo35%
- Runant5%
- SCBoutique5%
- Debialo5%
- OTC3%
- Open — no brand owns it (4 brands, 9%)
Product shelf
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
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
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
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
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
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
Trending
90-day click momentum15T 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$93.743.0★
maXpeedingrods Universal Cylinder Liner Puller Assembly Diesel Engine Cylinder Liner Removal Tool for Mack Cummins CAT on Wet Liner from 3-7/8 to 6-1/4 bore PT-6400-C M50010-B 3376015
maXpeedingrods$119.912.9★
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★
Compression Sleeve Puller Tool Remove Nut & Ferrule Of Pipe 03943 Sleeve Remover For 1/2 Compression Fittings Only Corroded & Frozen Supply Stops Plumbing Tools Compression Ring Removal Tool
Debialo$13.714.6★
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★
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×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“its easy to use”
“Excellent product”
“As Advertised”
“great value for the money”
“I like that it was the metal tool was well made and durable”
“Extremely heavy duty and adjustable”
“Good design, works perfectly”
“giving you controlled pressure instead of forcing anything”
“Very sturdy”
“Works well”
What buyers complain about
“Poor quality control”
“Not so easy to use”
“it wouldn't work”
“the picture is very deceiving”
“The clamps don't stay close”
“It's heavy so make sure to cover your crank before adjusting it to your sleeve length so not to hit or ding anything”
“Broke right away”
“The tool is also not very large”