21 inch wiper blades
Skip itA small market ($36K/yr) — this niche doesn't clear our bar today.
Conversion
Great7.9%search→purchase rate — share of searches ending in a sale
Avg price
Great$16.36avg listing price — sweet spot $15–$100
Returns
Great2.0%return rate — above 5% kills the launch gate
Price range
Good$4.82–$38.49cheapest to priciest tracked listing — scored on the share inside $15–$100
Quality gap
Good4.4★avg incumbent rating — lower means beatable quality
Brand share
Okay75%top-5 brand share — brands hold most of the demand
Competition
Okay58%top-5 click share — leaders hold, buyers still browse
Review moat
Bad23,469.12avg incumbent reviews — the moat a new listing must climb
Growth
Bad-29.8%90-day search growth — must beat 0% to launch
Market size
Bad$36K$36K/yr · 28K searches
According to Flapen's Amazon United States niche tracking, 21 inch wiper blades is a $36K/yr Amazon United States market (28K searches/yr). The top 5 brands hold 75% of demand. Verdict: Skip it — 43/100.
Data updated Jul 11, 2026 · scored weekly · How we score niches
21 inch wiper blades market data
- Units sold / yr
- 3K–3K
- avg 100–250/product
- Revenue / yr
- $41K–$49K
- units × avg price
- Conversion rate
- 7.9%
- Avg BSR
- #106
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 76%
- Out of stock
- 7.7%
- Avg brand age
- 72 months
- Avg seller age
- 174 days
Competition & brand share
The top 5 products take 58% of clicks — established leaders, but buyers still shop beyond them.Brands
16 rising
Sellers
66
Top-5 brand share
75%
Top 20: 100%
Top-5 click share
58%
Top 20: 95%
Open market
21%
- Rain-X38%
- PARRATI18%
- RACOONA8%
- JINGOU7%
- YJWKJZ4%
- Bosch3%
Demand
Weekly Amazon search volume, last 14 weeks — -29.8% search growth over the last 90 days.Top 21 inch wiper blades search terms
- 21 inch wiper blades11K/yr
- 21 wiper blade7K/yr
- windshield wipers 21 inch4K/yr
- 21 wiper blades 2 pack3K/yr
- 21 windshield wiper blades3K/yr
Top 21 inch wiper blades 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 24 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
OEM QUALITY 21 + 21 PARRATI Premium All-Season Windshield Wiper Blades (Set of 2)
PARRATI$17.774.5★24,703 rev
Rain-X RX30221 WeatherBeater Wiper Blades 21 Windshield Wipers (Pack Of 1) Automotive Replacement Windshield Wiper Blades That Meet Or Exceed OEM Quality And Durability Standards
Rain-X$12.384.5★66,706 rev
Rain-X 5079278-2 Repellency Water Repellent Wiper Blades 21 Windshield Wiper All Weather Streak-Free for Enhanced Visibility w/Water Repellency Formula
Rain-X$16.444.4★119,593 rev
RACOONA OEM QUALITY Premium All-Season Windshield Wiper Blades Pack of 2 Durable Stable And Quiet Windshield Wiper Blades Automotive Replacement Winshield Wipers For My Car (21+21)
RACOONA$10.894.5★765 rev
![Rain-X 810321 Repellency Water Repellent Wiper Blades 21 Windshield Wiper All Weather Streak-Free for Enhanced Visibility w/Water Repellency Formula [Amazon Exclusive]](https://m.media-amazon.com/images/I/31Rv9YiknRL.jpg)
Rain-X 810321 Repellency Water Repellent Wiper Blades 21 Windshield Wiper All Weather Streak-Free for Enhanced Visibility w/Water Repellency Formula [Amazon Exclusive]
Rain-X$19.444.4★119,593 rev
Newest
by launch dateRain-X 810321 Repellency Water Repellent Wiper Blades 21 Windshield Wiper All Weather Streak-Free for Enhanced Visibility w/Water Repellency Formula [Amazon Exclusive]
Rain-X$19.44119,593 rev
![Rain-X 810355 Repellency Water Repellent Wiper Blades 22 & 21 Windshield Wipers All Weather Streak-Free for Enhanced Visibility w/Water Repellency Formula [Amazon Exclusive]](https://m.media-amazon.com/images/I/41OqneVm2FL.jpg)
Rain-X 810355 Repellency Water Repellent Wiper Blades 22 & 21 Windshield Wipers All Weather Streak-Free for Enhanced Visibility w/Water Repellency Formula [Amazon Exclusive]
Rain-X$38.49119,593 rev
JINGOU 21 + 18 Front Windshield Wiper Blades Compatible with 2019 GMC Canyon 2001-2005 Kia Rio 2003-2008 Toyota Matrix OEM QUALITY Premium All-Season Automotive Replacement Wipers(Pack of 2)
JINGOU$14.483,256 rev
JINGOU 21+21 Wiper Blades Compatible with Dodge Durango 2002-2003 Premium All-Season Windshield Wiper Blades-Driver and Passenger Side Automotive Replacement Windshield Wiper Blade (Pack Of 2)
JINGOU$14.17458 rev
3 Pack Windshield Wiper Blades Compatible with 2014-2021 Jeep Grand Cherokee Original Factory Quality Front Rear Wipers Blade Set for My Car - 22 21 11
VEIGEIR$16.052,555 rev
Trending
90-day click momentumJINGOU 21 + 18 Front Windshield Wiper Blades Compatible with 2019 GMC Canyon 2001-2005 Kia Rio 2003-2008 Toyota Matrix OEM QUALITY Premium All-Season Automotive Replacement Wipers(Pack of 2)
JINGOU$14.484.5★
Rain-X 810321 Repellency Water Repellent Wiper Blades 21 Windshield Wiper All Weather Streak-Free for Enhanced Visibility w/Water Repellency Formula [Amazon Exclusive]
Rain-X$19.444.4★
VTOGOI OEM Quality 21+21 Windshield Wiper Blades Premium All-Seasons J-Hook Replacement Wiper Blades (2 Pack)
VTOGOI$15.484.5★
Rain-X RX30121 Wiper Blade - 21
Rain-X$12.444.2★
OEM QUALITY 22 + 21 PARRATI Premium All-Season Windshield Wiper Blades (Set of 2)
PARRATI$17.684.5★
What buyers say about 21 inch wiper blades
What buyers praise and complain about, mined from review topics.What buyers love
“Great deal”
“Way better than cheap brands”
“fit the vehicle perfectly”
“Easy Install”
“Does the job”
“Ease”
“Works great”
“These were the easiest installation wiper blades”
“function great”
“Adapters included to fit any vehicle it seems”
What buyers complain about
“While raining it is difficult to see out of the windshield as these wipers were basically pushing the water around”
“doesnt look good at all”
“Did not fit 2002 Passat as advertised”
“they're already leaving lots of water on the glass after about a month of being on my car”
“Doesnt fit like it said”
“These are expensive”
“doesn't work”
“Popping sound”
“it's GREEN”
“theyre made out of cheap rubber”
Top return reasons
Common questions
- Is 21 inch wiper blades profitable to sell on Amazon United States?
- The niche generates $36K/yr across 25 tracked products. 90-day search growth is -29.8%. Flapen's verdict: Skip it (43/100).
- How competitive is the 21 inch wiper blades niche?
- 16 brands and 66 sellers compete. The top 5 products take 58% of clicks and top 5 brands hold 75% of demand.
- What do buyers complain about in 21 inch wiper blades?
- Top complaints mined from reviews: Windshield Issues, Quality-Overall, Compatibility-Overall. The return rate is 2.0%.
- What does it cost to enter the 21 inch wiper blades niche?
- Listings span $4.82–$38.49; the average listing price is $16.36 (sweet spot $15–$100). The average incumbent carries 23,469 reviews — the moat a new listing must climb.