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.

4.00-6 tube

Skip it

Brand-locked demand (top 5 brands take 97% of clicks) — this niche doesn't clear our bar today.

Conversion

Incredible17.8%

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

Growth

Great+85.1%

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

Returns

Great1.9%

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

Okay2,858.91

avg incumbent reviews — the moat a new listing must climb

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Market size

Bad$72K

$72K/yr · 33K searches

Competition

Bad87%

top-5 click share — a locked-up shelf

Brand share

Bad97%

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

Competition & brand share

The top 5 products capture 87% of clicks — a locked-up shelf that new listings rarely crack.

Brands

7 falling

Sellers

Top-5 brand share

97%

Top 20: 100%

Top-5 click share

87%

Top 20: 100%

Open market

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.

Peak months: Apr, May, Jun · busiest ÷ quietest = 5.7×

Open Trend

Top 4.00-6 tube search terms

4.00-6 inner tube16K/yr +89.6%15.5% conv.
4.00-6 tire tube7K/yr +80.1%12.2% conv.
wheelbarrow tire and tube 4.00-64K/yr +75.8%6.0% conv.
4.00-6 tube3K/yr +90.8%14.5% conv.
4.00 x 6 inner tube3K/yr +78.0%12.1% conv.

All 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.

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

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$13.104.6★887 rev

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$12.954.3★20,330 rev

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$12.364.5★7,265 rev

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$19.944.4★936 rev

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$10.424.5★218 rev

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$10.0115 rev

5mo ago

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$11.13125 rev

5mo ago

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$12.367,265 rev

11mo ago

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$9.0598 rev

1y ago

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$8.9643 rev

1y ago

What buyers say about 4.00-6 tube

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

What buyers love

Size-Overall30%

“Exact size”

Quality-Overall28%

“Seem to be good quality, arrived quickly”

Value For Money11%

“reasonable price”

Ease Of Use7%

“Handy”

Assembly/Installation6%

“Easy install”

Durability4%

“The FLKQC Tubes are Very Durable & Reliable”

Advertised Vs Actual Product4%

“Exactly as described”

Thickness3%

“The rubber is thick”

Leak-Proof2%

“So far good buy no leaks”

Product Condition2%

“New tubes”

What buyers complain about

Quality-Overall29%

“For sure POOR QUALITY control”

Durability26%

“Tubes Don't Last”

Pressure8%

“My only complaint is the tubes don't have max psi on the side or any where”

Defective Material/Parts8%

“apparently a manufacturing defect”

Assembly/Installation6%

“I didnt even get to finish installing all four tubes on the go kart when one popped on its own”

Value For Money4%

“Waste of money”

Flatness4%

“First one went flat”

Leak-Proof4%

“Leaked”

Maintenance And Repair4%

“needed a replacement”

Thickness4%

“This tube very thin”

Top return reasons

Size-Overall64%

Functionality-Overall7%

Advertised Vs Actual Product7%

Compatibility-Overall4%

Leak-Proof3%

Maintenance And Repair3%

Assembly/Installation3%

Value For Money3%

Durability2%

Mounting2%

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.

4.00-6 tube

4.00-6 tube market data

Competition & brand share

Demand & seasonality

Top 4.00-6 tube search terms