Is 13/16 spark plug socket profitable to sell on Amazon United States?

The niche generates $55K/yr across 17 tracked products. 0 of 3 products launched in the last 360 days are still selling. 90-day search growth is +22.6%. Flapen's verdict: Skip it (47/100).

How competitive is the 13/16 spark plug socket niche?

15 brands and 24 sellers compete. The top 5 products take 60% of clicks and top 5 brands hold 62% of demand.

What do buyers complain about in 13/16 spark plug socket?

Top complaints mined from reviews: Socket/Port/Plug, Size-Overall, Functionality-Overall. The return rate is 3.0%.

When does demand for 13/16 spark plug socket peak?

Demand peaks in Apr–May; the busiest month runs 2.3× the quietest.

What does it cost to enter the 13/16 spark plug socket niche?

Listings span $5.98–$18.30; the average listing price is $9.82 (sweet spot $15–$100). The average incumbent carries 582 reviews — the moat a new listing must climb.

13/16 spark plug socket

Skip it

A small market ($55K/yr) — this niche doesn't clear our bar today.

Conversion

Incredible16.4%

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

Review moat

Good582.06

avg incumbent reviews — the moat a new listing must climb

Brand share

Good62%

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

Growth

Good+22.6%

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

Returns

Good3.0%

return rate — above 5% kills the launch gate

Competition

Okay60%

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

Avg price

Okay$9.82

avg listing price — sweet spot $15–$100

Price range

Okay$5.98–$18.30

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

Quality gap

Bad4.6★

avg incumbent rating — lower means beatable quality

Market size

Bad$55K

$55K/yr · 34K searches

According to Flapen's Amazon United States niche tracking, 13/16 spark plug socket is a $55K/yr Amazon United States market (34K searches/yr). The top 5 brands hold 62% of demand. Demand peaks in Apr–May. Verdict: Skip it — 47/100.

Data updated Jul 12, 2026 · scored weekly · How we score niches

13/16 spark plug socket market data

Units sold / yr: 5K–6K; avg 250–500/product
Revenue / yr: $49K–$59K; units × avg price
Conversion rate: 16.4%
Avg BSR: #65
Page quality: 0%
Prime: 100%
Sponsored: 65%
Out of stock: 5.0%
Avg brand age: 44 months
Avg seller age: 175 days

Competition & brand share

The top 5 products take 60% of clicks — established leaders, but buyers still shop beyond them.

Brands

15 rising

Sellers

Top-5 brand share

62%

Top 20: 100%

Top-5 click share

60%

Top 20: 100%

Open market

30%

A ABIGAIL23%
TEKTON11%
starfa lab10%
GZZTORES9%
GEARWRENCH9%
LAINLOY8%

Demand & seasonality

Weekly Amazon search volume, last 61 weeks — +22.6% search growth over the last 90 days.

Peak months: Apr, May · busiest ÷ quietest = 2.3×

Open Trend

Top 13/16 spark plug socket 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 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

13/16-inch Magnetic Spark Plug Socket 3/8-inch Drive 6-Point Powerful Magnet Retains Spark Plugs Chrome Vanadium Steel

A ABIGAIL$9.954.6★1,047 rev

TEKTON 3/8 Inch Drive x 13/16 Inch Deep 6-Point Socket | SHD13021

TEKTON$6.444.8★2,074 rev

GZZTORES Spark Plug Socket Wrench T-Handle 5/8 Inch (16mm) and 13/16 Inch(21mm) Spark Plug Socket Wrench Remover Installer Tool for Motorcycles Lawn mowers and Small Motor Vehicles etc

GZZTORES$7.334.6★405 rev

GEARWRENCH 3/8 Drive 2-1/2 Spark Plug Socket 13/16 6 Point - 80403

GEARWRENCH$6.174.7★52 rev

1PCS Magnetic Spark Plug Socket Powerful Magnet Retains Spark Plugs Chrome Vanadium Steel Spark Plug Socket (13/16-inch)

LAINLOY$7.614.7★197 rev

Newest

by launch date

13/16 Spark Plug Socket Set Thin Wall 12 Point 3/8 Drive Magnetic Spark Plug Removal Tool Compatible with Many European and Japanese Vehicles Universal Joint Swivel Socket (13/16inch 6-Point)

starfa lab$8.8217 rev

5mo ago

13/16 Spark Plug Socket Set Thin Wall 12 Point 3/8 Drive Magnetic Spark Plug Removal Tool Compatible with Many European and Japanese Vehicles Universal Joint Swivel Socket (13/16inch 12-Point)

starfa lab$11.9417 rev

5mo ago

pwkauka 3Pcs Spark Plug Socket Wrench Set T-Handle Universal 5/8 & 13/16 Spark Plug Tool Remover and Installer Tool for Motorcycles Lawn Mowers Small Motor Vehicles Car Accessories

pwkauka$5.98205 rev

10mo ago

Qixiang CB 13/16 Spark Plug Socket Set Thin Walled Magnetic Spark Plug Socket Car Accessories Universal Joint 3/8 Drive 12 Point Swivel Socket Removal Tool (13/16inch)

Qixiang CB$11.67110 rev

1y ago

ELEAD 6-Piece 3/8 Drive Spark Plug Socket Set with Spark Plug Gapper SAE & Metric 5/8 3/4 13/16 14mm 18mm CR-V Sockets with Rubber Holding Rings

ELEAD$14.08702 rev

1y ago

What buyers say about 13/16 spark plug socket

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

What buyers love

Quality-Overall20%

“High quality tools at a great price”

Advertised Vs Actual Product15%

“Works great as intended”

Socket/Port/Plug14%

“Nice SP socket”

Ease Of Use13%

“Easy to use”

Size-Overall8%

“Fits perfectly”

Magnetic Strength/Adsorption5%

“Strong magnet”

Efficiency5%

“Works perfectly”

Value For Money5%

“the price is reasonable”

Strength4%

“The holder is great”

Durability3%

“durability was good”

What buyers complain about

Socket/Port/Plug21%

“wont hold any of the sockets”

Size-Overall13%

“Did not fit my motorcycle spark plug”

Functionality-Overall13%

“Didnt get the job done”

Quality-Overall9%

“Poor quality”

Grip8%

“However, when I put in the new plug, it does not grip as tight, even allowing the plug to fall off”

Advertised Vs Actual Product6%

“Very misleading”

Ease Of Use5%

“Hard to use”

Durability5%

“Broken on the first use”

Rubber Quality3%

“Rubber only last for 1 time”

Defective Material/Parts3%

“Not sure if it was a defective set”

Top return reasons

Size-Overall51%

Socket/Port/Plug16%

Functionality-Overall5%

Compatibility-Overall5%

Value For Money3%

Quality-Overall3%

Advertised Vs Actual Product3%