---
title: "Reviews — harley davidson spark plugs - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/harley-davidson-spark-plugs/reviews"
last_updated: "2026-08-10T23:12:28.999Z"
locale: en
meta:
  description: "Niche score 49/100 · $78K/yr market · 71K searches/yr · $18.88 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:description": "Niche score 49/100 · $78K/yr market · 71K searches/yr · $18.88 avg price. Doesn't clear our bar today. Data updated Jul 2026."
  "og:title": "Reviews — harley davidson spark plugs - Flapen"
---

# **harley davidson spark plugs**

**Skip it**

A small market ($78K/yr) — this niche doesn't clear our bar today.

Market size 19Growth 64Conversion 65Competition 22Returns 82Price range 74Avg price 85Brand share 19Review moat 72Quality gap 45

**Avg price**

**Great****$18.88**

avg listing price — sweet spot $15–$100

**Returns**

**Great****1.7%**

return rate — above 5% kills the launch gate

**Price range**

**Good****$6.55–$38.94**

cheapest to priciest tracked listing — scored on the share inside $15–$100

**Review moat**

**Good****612.07**

avg incumbent reviews — the moat a new listing must climb

**Conversion**

**Good****5.8%**

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

**Growth**

**Good****+42.4%**

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

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Competition**

**Bad****73%**

top-5 click share — a locked-up shelf

**Market size**

**Bad****$78K**

$78K/yr · 71K searches

**Brand share**

**Bad****93%**

top-5 brand share — brand-locked demand

## Reviews