---
title: "4.00-6 Tube — $72K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/4-00-6-tube"
last_updated: "2026-08-09T03:56:53.645Z"
locale: en
meta:
description: "Niche score 46/100 · $72K/yr market · 33K searches/yr · $12.30 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 46/100 · $72K/yr market · 33K searches/yr · $12.30 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "4.00-6 Tube — $72K/yr Amazon US Niche (2026) - Flapen"
---
# **4.00-6 tube**
**Skip it**
Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.
Market size 18Growth 85Conversion 99Competition 11Returns 77Price range 45Avg price 53Brand share 8Review moat 36Quality gap 33
**Conversion**
**Incredible****17.8%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Great****+85.1%**
90-day search growth — must beat 0% to launch
**Returns**
**Great****1.9%**
return rate — above 5% kills the launch gate
**Avg price**
**Good****$12.30**
avg listing price — sweet spot $15–$100
**Price range**
**Okay****$8.88–$19.94**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Okay****2,858.91**
avg incumbent reviews — the moat a new listing must climb
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Bad****$72K**
$72K/yr · 33K searches
**Competition**
**Bad****87%**
top-5 click share — a locked-up shelf
**Brand share**
**Bad****97%**
top-5 brand share — brand-locked demand
According to Flapen's Amazon United States niche tracking, 4.00-6 tube is a $72K/yr Amazon United States market (33K searches/yr). The top 5 brands hold 97% of demand. Demand peaks in Apr–May–Jun. Verdict: Skip it — 46/100.
Data updated Jul 14, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **4.00-6 tube market data**
- **Units sold / yr**
- **5K–6K**
- avg 250–500/product
- **Revenue / yr**
- **$62K–$74K**
- units × avg price
- **Conversion rate**
- **17.8%**
- **Avg BSR**
- **#229**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **82%**
- **Out of stock**
- **0.6%**
- **Avg brand age**
- **37 months**
- **Avg seller age**
- **195 days**
## **Competition & brand share**
The top 5 products capture 87% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**7 **▼falling
**Sellers**
**13**
**Top-5 brand share**
**97%**
Top 20: 100%
**Top-5 click share**
**87%**
Top 20: 100%
**Open market**
**2%**
- AR-PRO49% - GICOOL31% - QsEzDo8% - MerryYard6% - FLKQC2% - AMGSH2% - Open — no brand owns it (1 brand, 2%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +85.1% search growth over the last 90 days.
1K750Spike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: Apr, May, Jun · busiest ÷ quietest = 5.7×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/4-00-6-tube/trend)
## **Top 4.00-6 tube search terms**
- **4.00-6 inner tube**16K/yr+89.6%15.5% conv. - **4.00-6 tire tube**7K/yr+80.1%12.2% conv. - **wheelbarrow tire and tube 4.00-6**4K/yr+75.8%6.0% conv. - **4.00-6 tube**3K/yr+90.8%14.5% conv. - **4.00 x 6 inner tube**3K/yr+78.0%12.1% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/4-00-6-tube/search-terms)
## **Top 4.00-6 tube 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%10%$7K20%$14K30%$22K40%$29K101001K10K100K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**GICOOL 4.00-6 Replacement Inner Tube 2 Pack with TR-13 Valve Stem Heavy Duty For 13 Tires Wheelbarrow Garden Utility Wagon Go Cart Lawn Mower**GICOOL**$13.10**4.6★887 rev](https://www.amazon.com/dp/B0C485K6GL) [2![AR-PRO 13 x 4.00-6 [4.10/3.50-6] Heavy Duty Replacement Inner Tube with TR-13 Straight Valve Stem (2-Pack) - for Wheelbarrows Mowers Hand Trucks and More](https://m.media-amazon.com/images/I/411c7L9mJBL.jpg)**AR-PRO 13 x 4.00-6 \[4.10/3.50-6\] Heavy Duty Replacement Inner Tube with TR-13 Straight Valve Stem (2-Pack) - for Wheelbarrows Mowers Hand Trucks and More**AR-PRO**$12.95**4.3★20,330 rev](https://www.amazon.com/dp/B07DK8MWFR) [3**AR-PRO 4.10/4.00/3.50-6 Inner Tubes with TR-87 Bent Valve Replacement 13x4.00-6 Heavy-Duty Tubes for Lawn Mowers Tractors Wheelbarrows Hand Trucks Yard Trailers Snow Blowers and More 2 Pack**AR-PRO**$12.36**4.5★7,265 rev](https://www.amazon.com/dp/B0FK588BF8) [4**AR-PRO 13 x 4.00-6 (4.10/3.50-6) Heavy Duty Replacement Inner Tube with TR-13 Straight Valve Stem (4-Pack) - for Wheelbarrows Mowers Hand Trucks and More**AR-PRO**$19.94**4.4★936 rev](https://www.amazon.com/dp/B0819D842F) [5**2-Pack of 13 * 4.00-6 Inner Tubes TR13 Straight Valve Stem High air tightness Heavy Duty Replacement for Hand Truck Wheelbarrows Mowers Utility Wagon for 4.10/3.50-6 Wheel 350/400-6 3.50-6 4.10-6**MerryYard**$10.42**4.5★218 rev](https://www.amazon.com/dp/B0CT5J7FY1)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**FLKQC 2 Pack 13x4.00-6 Heavy Duty Inner Tubes with TR-13 Valve Stem Replacement Lawn Mower Tire Tubes for Tractors Wheelbarrows ATVs Go Karts & More (13x4.00-6 TR-13)**FLKQC**$10.01**15 rev5mo ago](https://www.amazon.com/dp/B0GJZYTJYB) [**AMGSH 2 Pack 13 x 4.00-6 (4.10/3.50-6) Inner Tube Heavy Duty Inner Tube 13x3.50/4.00-6 Inner Tube with TR13 Straight Valve Stem Inner Tubes Ideal for Lawn Mowers Garden Equipment Lawn Equipment**AMGSH**$11.13**125 rev5mo ago](https://www.amazon.com/dp/B0GHRKMX3G) [**AR-PRO 4.10/4.00/3.50-6 Inner Tubes with TR-87 Bent Valve Replacement 13x4.00-6 Heavy-Duty Tubes for Lawn Mowers Tractors Wheelbarrows Hand Trucks Yard Trailers Snow Blowers and More 2 Pack**AR-PRO**$12.36**7,265 rev11mo ago](https://www.amazon.com/dp/B0FK588BF8) [**QsEzDo 3.50/4.00-6 Inner Tube with TR87 Bent Valve Stem (1 Pack) for Hand Trucks Utility Cart Lawn Mowers Wheelbarrows Dollys Scooters Replacement 13x4.00-6 4.00-6 Tire.**QsEzDo**$9.05**98 rev1y ago](https://www.amazon.com/dp/B0DPDR1XSK) [**QsEzDo 4.00/3.50-6 Inner Tube with TR87 Bent Valve Stem (1 Pack) work for 4.10/3.50-6 13x4.00-6 13x5.00-6 145/70-6 tire onto Hand Trucks Utility Cart Lawn Mowers Wheelbarrows and more**QsEzDo**$8.96**43 rev1y ago](https://www.amazon.com/dp/B0DSCWFMGZ)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**FLKQC 2 Pack 13x4.00-6 Heavy Duty Inner Tubes with TR-13 Valve Stem Replacement Lawn Mower Tire Tubes for Tractors Wheelbarrows ATVs Go Karts & More (13x4.00-6 TR-13)**FLKQC**$10.01**5.0★**▲ 132%**](https://www.amazon.com/dp/B0GJZYTJYB) [**AMGSH 2 Pack 13 x 4.00-6 (4.10/3.50-6) Inner Tube Heavy Duty Inner Tube 13x3.50/4.00-6 Inner Tube with TR13 Straight Valve Stem Inner Tubes Ideal for Lawn Mowers Garden Equipment Lawn Equipment**AMGSH**$11.13**4.6★**▲ 131%**](https://www.amazon.com/dp/B0GHRKMX3G) [**AR-PRO 4.10/4.00/3.50-6 Inner Tubes with TR-87 Bent Valve Replacement 13x4.00-6 Heavy-Duty Tubes for Lawn Mowers Tractors Wheelbarrows Hand Trucks Yard Trailers Snow Blowers and More 2 Pack**AR-PRO**$12.36**4.5★**▲ 120%**](https://www.amazon.com/dp/B0FK588BF8) [**QsEzDo 3.50/4.00-6 Inner Tube with TR87 Bent Valve Stem (1 Pack) for Hand Trucks Utility Cart Lawn Mowers Wheelbarrows Dollys Scooters Replacement 13x4.00-6 4.00-6 Tire.**QsEzDo**$9.05**4.4★**▲ 34%**](https://www.amazon.com/dp/B0DPDR1XSK) [**AR-PRO 13 x 4.00-6 (4.10/3.50-6) Heavy Duty Replacement Inner Tube with TR-13 Straight Valve Stem (4-Pack) - for Wheelbarrows Mowers Hand Trucks and More**AR-PRO**$19.94**4.4★**— 6%**](https://www.amazon.com/dp/B0819D842F)
**~~View all trending →~~**
## **What buyers say about 4.00-6 tube**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**30%
*“Exact size”*
**Quality-Overall**28%
*“Seem to be good quality, arrived quickly”*
**Value For Money**11%
*“reasonable price”*
**Ease Of Use**7%
*“Handy”*
**Assembly/Installation**6%
*“Easy install”*
**Durability**4%
*“The FLKQC Tubes are Very Durable & Reliable”*
**Advertised Vs Actual Product**4%
*“Exactly as described”*
**Thickness**3%
*“The rubber is thick”*
**Leak-Proof**2%
*“So far good buy no leaks”*
**Product Condition**2%
*“New tubes”*
### **What buyers complain about **
**Quality-Overall**29%
*“For sure POOR QUALITY control”*
**Durability**26%
*“Tubes Don't Last”*
**Pressure**8%
*“My only complaint is the tubes don't have max psi on the side or any where”*
**Defective Material/Parts**8%
*“apparently a manufacturing defect”*
**Assembly/Installation**6%
*“I didnt even get to finish installing all four tubes on the go kart when one popped on its own”*
**Value For Money**4%
*“Waste of money”*
**Flatness**4%
*“First one went flat”*
**Leak-Proof**4%
*“Leaked”*
**Maintenance And Repair**4%
*“needed a replacement”*
**Thickness**4%
*“This tube very thin”*
### **Top return reasons **
**Size-Overall**64%
**Functionality-Overall**7%
**Advertised Vs Actual Product**7%
**Compatibility-Overall**4%
**Leak-Proof**3%
**Maintenance And Repair**3%
**Assembly/Installation**3%
**Value For Money**3%
**Durability**2%
**Mounting**2%
## **Common questions**
- **Is 4.00-6 tube profitable to sell on Amazon United States?**
- The niche generates $72K/yr across 11 tracked products. 1 of 3 products launched in the last 360 days are still selling. 90-day search growth is +85.1%. Flapen's verdict: Skip it (46/100).
- **How competitive is the 4.00-6 tube niche?**
- 7 brands and 13 sellers compete. The top 5 products take 87% of clicks and top 5 brands hold 97% of demand.
- **What do buyers complain about in 4.00-6 tube?**
- Top complaints mined from reviews: Quality-Overall, Durability, Pressure. The return rate is 1.9%.
- **When does demand for 4.00-6 tube peak?**
- Demand peaks in Apr–May–Jun; the busiest month runs 5.7× the quietest.
- **What does it cost to enter the 4.00-6 tube niche?**
- Listings span $8.88–$19.94; the average listing price is $12.30 (sweet spot $15–$100). The average incumbent carries 2,859 reviews — the moat a new listing must climb.
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