Is quarter fenders for semi truck profitable to sell on Amazon United States?

The niche generates $475K/yr across 55 tracked products. 7 of 13 products launched in the last 360 days are still selling. 90-day search growth is -16.7%. Flapen's verdict: Worth a look (59/100).

How competitive is the quarter fenders for semi truck niche?

27 brands and 48 sellers compete. The top 5 products take 31% of clicks and top 5 brands hold 56% of demand.

What do buyers complain about in quarter fenders for semi truck?

Top complaints mined from reviews: Quality-Overall, Durability, Mounting. The return rate is 1.2%.

When does demand for quarter fenders for semi truck peak?

Demand peaks in Mar–May; the busiest month runs 1.6× the quietest.

What does it cost to enter the quarter fenders for semi truck niche?

Listings span $60.47–$1234.43; the average listing price is $257.30 (sweet spot $15–$100). The average incumbent carries 50 reviews — the moat a new listing must climb.

quarter fenders for semi truck

Worth a look

Shows a thin review moat (50 avg reviews), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Review moat

Incredible50.27

avg incumbent reviews — the moat a new listing must climb

Quality gap

Incredible3.9★

avg incumbent rating — lower means beatable quality

Returns

Great1.2%

return rate — above 5% kills the launch gate

Competition

Great31%

top-5 click share — an open shelf

Brand share

Great56%

top-5 brand share — no brand owns this niche

Market size

Good$475K

$475K/yr · 126K searches

Avg price

Okay$257.30

avg listing price — sweet spot $15–$100

Conversion

Bad1.5%

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

Growth

Bad-16.7%

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

Price range

Bad$60.47–$1234.43

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

Signals No Dominant Brand Low Review Barrier Quality Gap High Price

According to Flapen's Amazon United States niche tracking, quarter fenders for semi truck is a $475K/yr Amazon United States market (126K searches/yr). The top 5 brands hold 56% of demand. Demand peaks in Mar–May. Verdict: Worth a look — 59/100.

Data updated Jul 9, 2026 · scored weekly · How we score niches

quarter fenders for semi truck market data

Units sold / yr: 3K–3K; avg 0–100/product
Revenue / yr: $643K–$772K; units × avg price
Conversion rate: 1.5%
Avg BSR: #1,121
Page quality: 0%
Prime: 51%
Sponsored: 80%
Out of stock: 10.1%
Avg brand age: 50 months
Avg seller age: 171 days

Competition & brand share

Clicks spread well past the top 5 (31% combined) — an open shelf where new products get seen.

Brands

27 falling

Sellers

Top-5 brand share

56%

Top 20: 96%

Top-5 click share

31%

Top 20: 72%

Open market

38%

Gelacie15%
Trux Accessories13%
TBOZZ12%
BA Products9%
BST BSSP7%
GaeaAuto7%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -16.7% search growth over the last 90 days.

Peak months: Mar, May · busiest ÷ quietest = 1.6×

Open Trend

Top quarter fenders for semi truck search terms

quarter fenders for semi truck25K/yr -4.6%3.1% conv.
semi truck fenders21K/yr -13.8%0.7% conv.
half fenders for semi trucks17K/yr -24.9%0.7% conv.
semi fenders10K/yr -7.3%1.0% conv.
truck fenders8K/yr -17.0%0.4% conv.
quarter fenders7K/yr +2.2%3.2% conv.
semi truck quarter fenders7K/yr -21.5%3.7% conv.
semi quarter fenders5K/yr +14.1%3.9% conv.
semi half fenders6K/yr -25.8%0.3% conv.
semi truck half fenders5K/yr -21.0%0.2% conv.

All search terms

Top quarter fenders for semi truck 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 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Trux Poly Half Fenders - Pair Black Item Number TFEN-H39

Trux Accessories$252.764.0★13 rev

Gelacie 30 x 24 Quarter Fenders for Semi Trucks Compatible with Freightliner Peterbilt Kenworth Volvo Mack 304 Stainless Steel Mirror-Finished Fenders Right & Left

Gelacie$146.334.5★71 rev

Stainless Steel Quarter Fender Set (24x24) Semi Truck in pair. With mounting tube.

TBOZZ$127.874.2★258 rev

TRUX Single Axle Poly Fenders - Pair Black

Trux Accessories$236.824.2★9 rev

SHINJEW Pair Black Poly Quarter Fenders Set for Semi Truck 24 x 24 Freightliner Kenworth Peterbilt with Hardware Heavy Duty Plastic Mud Flaps Kit

SHINJEW$72.884.6★78 rev

Newest

by launch date

BST BSSP Pair 430 Stainless Steel 60 in Half Fenders Universal for Peterbilt Freightliner Kenworth Volvo Western Star Truck Heavy Duty w/Rolled Edge Polished Overall Right & Left Sides

BST BSSP$685.331 rev

4mo ago

Gelacie Upgrade 33 x 24 Quarter Fenders for Semi Trucks Compatible with Freightliner Peterbilt Kenworth Volvo Mack Polishing Stainless Steel Fenders Right & Left

Gelacie$212.0871 rev

8mo ago

24x24 Quarter Fenders for Semi Truck 2PCS Stainless Steel Quarter Fender Set Mud Flap Hangers with Single Bolt Mounting Brackets

hightall$114.392 rev

10mo ago

Gelacie 30 x 24 Quarter Fenders for Semi Trucks Compatible with Freightliner Peterbilt Kenworth Volvo Mack 304 Stainless Steel Mirror-Finished Fenders Right & Left

Gelacie$146.3371 rev

11mo ago

Gelacie 34 x 24 Quarter Fenders for Semi Trucks Compatible with Freightliner Peterbilt Kenworth Volvo Mack 304 Stainless Steel Mirror-Finished Fenders Right & Left

Gelacie$229.9324 rev

11mo ago

What buyers say about quarter fenders for semi truck

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

What buyers love

Quality-Overall34%

“Good quality easy to assemble”

Size-Overall16%

“Fits Perfect”

Value For Money15%

“Definitely worth it”

Assembly/Installation7%

“easy to piece together”

Durability4%

“durable”

Advertised Vs Actual Product4%

“As expected”

Mounting4%

“good for now perfect fit with all hardware included good price”

Ease Of Use3%

“Good and easy”

Material Quality2%

“materials are light weight”

Strength1%

“Solidly built”

What buyers complain about

Quality-Overall31%

“Hardware is poor quality”

Durability18%

“Cracked”

Mounting8%

“Had to buy longer bolts”

Strength7%

“Breaks easily”

Advertised Vs Actual Product5%

“Deceptive pictures”

Material Quality4%

“Material dont last”

Size-Overall3%

“Does not fit correctly”

Rusts/Corrodes3%

“flaking rust”

Assembly/Installation2%

“Assembly required”

Instructions/User Manual/Troubleshooting2%

“No instructions”

Top return reasons

Size-Overall36%

Mounting13%

Defective Material/Parts10%

Compatibility-Overall8%

Assembly/Installation5%

Functionality-Overall4%