18 inch bike tube
Skip itPrices mostly outside the sweet spot ($6.27–$12.37) — this niche doesn't clear our bar today.
Conversion
Incredible20.4%search→purchase rate — share of searches ending in a sale
Returns
Great1.1%return rate — above 5% kills the launch gate
Growth
Good+47.2%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Avg price
Okay$9.68avg listing price — sweet spot $15–$100
Review moat
Bad8,094.38avg incumbent reviews — the moat a new listing must climb
Market size
Bad$54K$54K/yr · 28K searches
Competition
Bad88%top-5 click share — a locked-up shelf
Brand share
Bad96%top-5 brand share — brand-locked demand
Price range
Bad$6.27–$12.37cheapest to priciest tracked listing — scored on the share inside $15–$100
According to Flapen's Amazon United States niche tracking, 18 inch bike tube is a $54K/yr Amazon United States market (28K searches/yr). The top 5 brands hold 96% of demand. Demand peaks in May–Jun–Jul–Aug–Sep. Verdict: Skip it — 41/100.
Data updated Jul 25, 2026 · scored weekly · How we score niches
18 inch bike tube market data
- Units sold / yr
- 5K–6K
- avg 500–750/product
- Revenue / yr
- $48K–$58K
- units × avg price
- Conversion rate
- 20.4%
- Avg BSR
- #111
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 75%
- Out of stock
- 4.8%
- Avg brand age
- 54 months
- Avg seller age
- 174 days
Competition & brand share
The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.Brands
6 falling
Sellers
27
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
88%
Top 20: 100%
Open market
0%
- BELL45%
- YunSCM23%
- Hydencamm14%
- Ultraverse10%
- FengCan4%
- Blackburn4%
- Open — no brand owns it (0%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +47.2% search growth over the last 90 days.Peak months: May, Jun, Jul, Aug, Sep · busiest ÷ quietest = 2.6×
Top 18 inch bike tube search terms
- 18x1.95 bike tube7K/yr
- 18 inch bike tube7K/yr
- 18 bike tube6K/yr
- 18x2.125 bike tire tube4K/yr
- 18 x 1.95 bike tube4K/yr
Top 18 inch bike 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.
All 8 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Bell Standard Bicycle Inner Tube 18 x 1.75-2.25 Schrader Valve
BELL$7.314.6★57,551 rev
2 PCS 18 Bike Tubes 18x1.75/2.125 AV32mm Schrader Valve 47/57-355 Bicycle Tube Compatible with 18 X 1.75 18 X 1.90 18 X 1.95 18 X 2.0 18 X 2.10 18X2.125 Bike Tire Tube
YunSCM$10.044.6★509 rev
Ultraverse 18 Bike Inner Tubes 18 x 1.75 1.95 2.00 2.10 2.125 Heavy Duty Butyl Rubber withSchrader Valve Replacement Bicycle Tube Compatible with Kids BMX Cruiser Mountain Bikes Set of 2
Ultraverse$11.334.4★320 rev
Hydencamm 2 Pack 18 Inch Bike Tube Fit 1.75/1.95/2.125 with 32mm Schrader Valve 18x1.95 Bicycle Tube with 2PCS Levers 18x2.125 Bike Tube Compatible with Kids/Road Bikes (2 of One Size)
Hydencamm$9.994.4★4,282 rev
Hydencamm 2 Pack 18x1.75/2.125 Bike Tube 18x1.75 18x1.95 18x2.10 18x2.125 with 35mm Schrader Valve Butyl 18x1.95 Bike Tube with 2PCS Levers Compatible with MTB and Cruisers City Road Bikes
Hydencamm$10.004.5★70 rev
Newest
by launch dateHydencamm 2 Pack 18x1.75/2.125 Bike Tube 18x1.75 18x1.95 18x2.10 18x2.125 with 35mm Schrader Valve Butyl 18x1.95 Bike Tube with 2PCS Levers Compatible with MTB and Cruisers City Road Bikes
Hydencamm$10.0070 rev
Hydencamm 2 Pack 18 Inch Bike Tube Fit 1.75/1.95/2.125 with 32mm Schrader Valve 18x1.95 Bicycle Tube with 2PCS Levers 18x2.125 Bike Tube Compatible with Kids/Road Bikes (2 of One Size)
Hydencamm$9.994,282 rev
18x1.75/1.95/2.0/2.10/2.125 Bike Tubes 18 Replacement Bicycle Tubes (2 PCS) Reliable 18 x 1.75-2.125 Bike Inner Tubes AV32mm Schrader Valve for City/Road/Kids/Mountain Cycling Scenarios
FengCan$10.0987 rev
Blackburn 18 x 1.75-2.25 Schrader Heavy Duty Bicycle Inner Tube with tire levers
Blackburn$6.271,013 rev
Ultraverse 18 Bike Inner Tubes 18 x 1.75 1.95 2.00 2.10 2.125 Heavy Duty Butyl Rubber withSchrader Valve Replacement Bicycle Tube Compatible with Kids BMX Cruiser Mountain Bikes Set of 2
Ultraverse$11.33320 rev
Trending
90-day click momentumHydencamm 2 Pack 18x1.75/2.125 Bike Tube 18x1.75 18x1.95 18x2.10 18x2.125 with 35mm Schrader Valve Butyl 18x1.95 Bike Tube with 2PCS Levers Compatible with MTB and Cruisers City Road Bikes
Hydencamm$10.004.5★
Bell Standard Bicycle Inner Tube 18 x 1.75-2.25 Schrader Valve
BELL$7.314.6★
Ultraverse 18 Bike Inner Tubes 18 x 1.75 1.95 2.00 2.10 2.125 Heavy Duty Butyl Rubber withSchrader Valve Replacement Bicycle Tube Compatible with Kids BMX Cruiser Mountain Bikes Set of 2
Ultraverse$11.334.4★
Blackburn 18 x 1.75-2.25 Schrader Heavy Duty Bicycle Inner Tube with tire levers
Blackburn$6.274.2★
2 PCS 18 Bike Tubes 18x1.75/2.125 AV32mm Schrader Valve 47/57-355 Bicycle Tube Compatible with 18 X 1.75 18 X 1.90 18 X 1.95 18 X 2.0 18 X 2.10 18X2.125 Bike Tire Tube
YunSCM$10.044.6★
What buyers say about 18 inch bike tube
What buyers praise and complain about, mined from review topics.What buyers love
“Quality product”
“Fit great”
“Works as expected”
“Easy to Use, Works Perfectly”
“No leaks”
“Good price”
“Easy to install”
“Durable”
What buyers complain about
“Leakage”
“Garbage”
“Manufacturing defects”
“Definitely frustrating to install a new one just to find out it had a hole”
“actual product doesnt have them as pictured so for price not as good a deal as it shows if you then go buy levers to take a tire off to replace tube”
“all I heard was a balloon getting rapidly deflated”
“Didn't work”
“the second one lasted 2 weeks”
Top return reasons
Common questions
- Is 18 inch bike tube profitable to sell on Amazon United States?
- The niche generates $54K/yr across 8 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +47.2%. Flapen's verdict: Skip it (41/100).
- How competitive is the 18 inch bike tube niche?
- 6 brands and 27 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 96% of demand.
- What do buyers complain about in 18 inch bike tube?
- Top complaints mined from reviews: Leak-Proof, Quality-Overall, Defective Material/Parts. The return rate is 1.1%.
- When does demand for 18 inch bike tube peak?
- Demand peaks in May–Jun–Jul–Aug–Sep; the busiest month runs 2.6× the quietest.
- What does it cost to enter the 18 inch bike tube niche?
- Listings span $6.27–$12.37; the average listing price is $9.68 (sweet spot $15–$100). The average incumbent carries 8,094 reviews — the moat a new listing must climb.