---
title: "Quarter Fenders for Semi Truck — $475K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/quarter-fenders-for-semi-truck"
last_updated: "2026-08-06T21:52:38.179Z"
locale: en
meta:
description: "Niche score 59/100 · $475K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 59/100 · $475K/yr market. A failed launch gate (market size, growth, or returns) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Quarter Fenders for Semi Truck — $475K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 59Growth 17Conversion 18Competition 84Returns 91Price range 3Avg price 37Brand share 79Review moat 97Quality gap 96
**Review moat**
**Incredible****50.27**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Incredible****3.9★**
avg incumbent rating — lower means beatable quality
**Returns**
**Great****1.2%**
return rate — above 5% kills the launch gate
**Competition**
**Great****31%**
top-5 click share — an open shelf
**Brand share**
**Great****56%**
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**
**Bad****1.5%**
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**](https://flapen.com/research/niches?market=us&signal=no_dominant_brand "Top brand's click share < 20%") [** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500") [** Quality Gap**](https://flapen.com/research/niches?market=us&signal=quality_gap "Avg rating < 4.0") [** High Price**](https://flapen.com/research/niches?market=us&signal=high_price "Avg price > $50")
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 ~~](https://flapen.com/research/methodology)
## **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**
**48**
**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.
3K2KSpike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Mar, May · busiest ÷ quietest = 1.6×
[**Open Trend **](https://flapen.com/research/us/automotive/quarter-fenders-for-semi-truck/trend)
## **Top quarter fenders for semi truck search terms**
- **quarter fenders for semi truck**25K/yr-4.6%3.1% conv. - **semi truck fenders**21K/yr-13.8%0.7% conv. - **half fenders for semi trucks**17K/yr-24.9%0.7% conv. - **semi fenders**10K/yr-7.3%1.0% conv. - **truck fenders**8K/yr-17.0%0.4% conv. - **quarter fenders**7K/yr+2.2%3.2% conv. - **semi truck quarter fenders**7K/yr-21.5%3.7% conv. - **semi quarter fenders**5K/yr+14.1%3.9% conv. - **semi half fenders**6K/yr-25.8%0.3% conv. - **semi truck half fenders**5K/yr-21.0%0.2% conv. [**All search terms **](https://flapen.com/research/us/automotive/quarter-fenders-for-semi-truck/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.
0%2%$9K4%$19K6%$28K8%$38K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**Trux Poly Half Fenders - Pair Black Item Number TFEN-H39**Trux Accessories**$252.76**4.0★13 rev](https://www.amazon.com/dp/B00PX0NIEM) [2**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**$146.33**4.5★71 rev](https://www.amazon.com/dp/B0FJWS1CBZ) [3**Stainless Steel Quarter Fender Set (24x24) Semi Truck in pair. With mounting tube.**TBOZZ**$127.87**4.2★258 rev](https://www.amazon.com/dp/B07XQZQK9F) [4**TRUX Single Axle Poly Fenders - Pair Black**Trux Accessories**$236.82**4.2★9 rev](https://www.amazon.com/dp/B00PX0NM0M) [5**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**$72.88**4.6★78 rev](https://www.amazon.com/dp/B0BJ5QDK5H)
**~~View all top sellers →~~**
### **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**$685.33**1 rev4mo ago](https://www.amazon.com/dp/B0GR9P4FQ7) [**Gelacie Upgrade 33 x 24 Quarter Fenders for Semi Trucks Compatible with Freightliner Peterbilt Kenworth Volvo Mack Polishing Stainless Steel Fenders Right & Left**Gelacie**$212.08**71 rev8mo ago](https://www.amazon.com/dp/B0FWBT7LC2) [**24x24 Quarter Fenders for Semi Truck 2PCS Stainless Steel Quarter Fender Set Mud Flap Hangers with Single Bolt Mounting Brackets**hightall**$114.39**2 rev10mo ago](https://www.amazon.com/dp/B0FMR9CS25) [**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**$146.33**71 rev11mo ago](https://www.amazon.com/dp/B0FJWS1CBZ) [**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**$229.93**24 rev11mo ago](https://www.amazon.com/dp/B0FHPQ6GQQ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**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**$685.33**1.0★**▲ 315%**](https://www.amazon.com/dp/B0GR9P4FQ7) [**TRUX Single Axle Poly Fenders - Pair Black**Trux Accessories**$236.82**4.2★**▲ 101%**](https://www.amazon.com/dp/B00PX0NM0M) [**Gelacie Upgrade 33 x 24 Quarter Fenders for Semi Trucks Compatible with Freightliner Peterbilt Kenworth Volvo Mack Polishing Stainless Steel Fenders Right & Left**Gelacie**$212.08**4.5★**▲ 93%**](https://www.amazon.com/dp/B0FWBT7LC2) [**VEVOR Stainless Steel Quarter Fenders for Semi Trucks 24 x 24 Semi Truck Fenders with Tube Bracket and Mounting Hardware 1 Pair Right & Left Quarter Fender Set Fit for Freightliner Peterbilt**VEVOR**$93.57**4.2★**▲ 77%**](https://www.amazon.com/dp/B0F7RF3H66) [**24x24 Quarter Fenders for Semi Truck 2PCS Stainless Steel Quarter Fender Set Mud Flap Hangers with Single Bolt Mounting Brackets**hightall**$114.39**5.0★**▲ 76%**](https://www.amazon.com/dp/B0FMR9CS25)
**~~View all trending →~~**
## **What buyers say about quarter fenders for semi truck**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Quality-Overall**34%
*“Good quality easy to assemble”*
**Size-Overall**16%
*“Fits Perfect”*
**Value For Money**15%
*“Definitely worth it”*
**Assembly/Installation**7%
*“easy to piece together”*
**Durability**4%
*“durable”*
**Advertised Vs Actual Product**4%
*“As expected”*
**Mounting**4%
*“good for now perfect fit with all hardware included good price”*
**Ease Of Use**3%
*“Good and easy”*
**Material Quality**2%
*“materials are light weight”*
**Strength**1%
*“Solidly built”*
### **What buyers complain about **
**Quality-Overall**31%
*“Hardware is poor quality”*
**Durability**18%
*“Cracked”*
**Mounting**8%
*“Had to buy longer bolts”*
**Strength**7%
*“Breaks easily”*
**Advertised Vs Actual Product**5%
*“Deceptive pictures”*
**Material Quality**4%
*“Material dont last”*
**Size-Overall**3%
*“Does not fit correctly”*
**Rusts/Corrodes**3%
*“flaking rust”*
**Assembly/Installation**2%
*“Assembly required”*
**Instructions/User Manual/Troubleshooting**2%
*“No instructions”*
### **Top return reasons **
**Size-Overall**36%
**Mounting**13%
**Defective Material/Parts**10%
**Compatibility-Overall**8%
**Assembly/Installation**5%
**Functionality-Overall**4%
**Advertised Vs Actual Product**4%
**Width**3%
**Value For Money**2%
**Thickness**2%
## **Common questions**
- **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.
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