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20x2.125 bicycle tube
Skip itPrices mostly outside the sweet spot ($7.02–$14.99) — this niche doesn't clear our bar today.
Conversion
Incredible24.2%search→purchase rate — share of searches ending in a sale
Returns
Great1.1%return rate — above 5% kills the launch gate
Growth
Good+56.1%90-day search growth — must beat 0% to launch
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Avg price
Okay$10.75avg listing price — sweet spot $15–$100
Brand share
Okay86%top-5 brand share — brands hold most of the demand
Market size
Okay$103K$103K/yr · 40K searches
Competition
Bad73%top-5 click share — a locked-up shelf
Review moat
Bad11,289avg incumbent reviews — the moat a new listing must climb
Price range
Bad$7.02–$14.99cheapest to priciest tracked listing — scored on the share inside $15–$100