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presta valve adapter
Skip itPrices mostly outside the sweet spot ($2.50–$5.43) — this niche doesn't clear our bar today.
Returns
Incredible0.4%return rate — above 5% kills the launch gate
Conversion
Incredible13.9%search→purchase rate — share of searches ending in a sale
Growth
Good+36.2%90-day search growth — must beat 0% to launch
Brand share
Good69%top-5 brand share — brands hold most of the demand
Review moat
Good1,332.19avg incumbent reviews — the moat a new listing must climb
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Market size
Bad£41K£41K/yr · 83K searches
Avg price
Bad£3.58avg listing price — sweet spot $15–$100
Price range
Bad£2.50–£5.43cheapest to priciest tracked listing — scored on the share inside $15–$100