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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