greenworks 21 inch mower blade
Worth a lookShows demand growing +173.5% this quarter, but a small market ($67K/yr) keeps it on the watch list.
Growth
Incredible+173.5%90-day search growth — must beat 0% to launch
Avg price
Incredible$25.63avg listing price — sweet spot $15–$100
Price range
Incredible$15.64–$38.42cheapest to priciest tracked listing — scored on the share inside $15–$100
Returns
Good2.1%return rate — above 5% kills the launch gate
Review moat
Good652.94avg incumbent reviews — the moat a new listing must climb
Conversion
Good5.7%search→purchase rate — share of searches ending in a sale
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Brand share
Okay87%top-5 brand share — brands hold most of the demand
Competition
Okay69%top-5 click share — leaders hold, buyers still browse
Market size
Bad$67K$67K/yr · 46K searches
According to Flapen's Amazon United States niche tracking, greenworks 21 inch mower blade is a $67K/yr Amazon United States market (46K searches/yr). The top 5 brands hold 87% of demand. Demand peaks in Apr–May–Jun–Jul–Aug. Verdict: Worth a look — 55/100.
Data updated Jul 16, 2026 · scored weekly · How we score niches
greenworks 21 inch mower blade market data
- Units sold / yr
- 3K–3K
- avg 100–250/product
- Revenue / yr
- $64K–$77K
- units × avg price
- Conversion rate
- 5.7%
- Avg BSR
- #610
- Page quality
- 0%
- Prime
- 100%
- Sponsored
- 65%
- Out of stock
- 2.9%
- Avg brand age
- 39 months
- Avg seller age
- 158 days
Competition & brand share
The top 5 products take 69% of clicks — established leaders, but buyers still shop beyond them.Brands
10 rising
Sellers
17
Top-5 brand share
87%
Top 20: 100%
Top-5 click share
69%
Top 20: 100%
Open market
9%
- Greenworks55%
- Fismiuta11%
- SWAPARTS8%
- Wadoy7%
- GICOOL7%
- DAOLONG5%
- Open — no brand owns it (4 brands, 9%)
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +173.5% search growth over the last 90 days.Peak months: Apr, May, Jun, Jul, Aug · busiest ÷ quietest = 18.1×
Top greenworks 21 inch mower blade search terms
- greenworks 21 inch mower blade12K/yr
- greenworks lawn mower blade9K/yr
- greenworks mower blade8K/yr
- kobalt 21 inch mower blade6K/yr
- greenworks blade3K/yr
- greenworks replacement blade3K/yr
- greenworks blade replacement3K/yr
- greenworks lawn mower blades2K/yr
Top greenworks 21 inch mower blade 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 17 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Greenworks Replacement Lawn Mower Blade (21 Mowers : MO40L4413 MO40L03 MO48L4422)
Greenworks$24.724.6★376 rev
Greenworks 2905203 Blade for 21 Mower Black
Greenworks$22.274.7★139 rev
Fismiuta 21 inch Lawn Mower Blade Compatible with Greenworks 21 Deck Mower Circle Mulching Replacement Lawn Mower Blade Replacement Model MO40L03 MO48L4422 MO40L4413
Fismiuta$22.514.5★45 rev
SWAPARTS Lawn Mower Blade for Greenworks 21 inch Mower C3208101 MO40L4413 MO40L03 MO48L4422
SWAPARTS$21.134.5★522 rev
GICOOL 1-Pack 21 Lawn Mower Blade Compatible with Greenworks 21 Deck Mower Replaces Models MO40L03 MO48L4422 MO40L4413
GICOOL$21.494.3★43 rev
Newest
by launch date
21 Inch Mower Blade 2 Pack Lawn Mower Blade Compatible with Greenworks 21 inch Mower Blade Fits MO40L03 MO48L4422 MO40L4413 C3208101 Lawn Mower Heavy Duty Sharp Replacement Blade
DAOLONG$35.2415 rev
Sthovd MO48L4422 Lawn Mower Blade Compatible with Greenworks 21 inch
Sthovd$19.655 rev
Wadoy Lawn Mower Blade 2 Pack Compatible with Greenworks 21 Inch Replacement Part for MO40L03 MO48L4422 MO40L4413 C3208101 Green Color
Wadoy$35.85103 rev
Dichallu 21 inch Mower Replacement Blade for Kobalt/Greenworks C3208101 MO40L4413 MO40L03 MO48L4422 (Black 2 Pack)
Dichallu$36.537 rev
Fismiuta 21 inch Lawn Mower Blade Compatible with Greenworks 21 Deck Mower Circle Mulching Replacement Lawn Mower Blade Replacement Model MO40L03 MO48L4422 MO40L4413
Fismiuta$22.5145 rev
Trending
90-day click momentum
25322 25242 16 inch Lawn Mower Blade Compatible with Greenworks 16 Corded Mower Circle Mulching Lawn Mower Blade Replacement Part 33303488 29512 for Greenworks
Fismiuta$20.994.5★
Sthovd MO48L4422 Lawn Mower Blade Compatible with Greenworks 21 inch
Sthovd$19.653.9★
21 Inch Mower Blade 2 Pack Lawn Mower Blade Compatible with Greenworks 21 inch Mower Blade Fits MO40L03 MO48L4422 MO40L4413 C3208101 Lawn Mower Heavy Duty Sharp Replacement Blade
DAOLONG$35.244.7★
Wadoy Lawn Mower Blade 2 Pack Compatible with Greenworks 21 Inch Replacement Part for MO40L03 MO48L4422 MO40L4413 C3208101 Green Color
Wadoy$35.854.6★
Dichallu 21 inch Mower Replacement Blade for Kobalt/Greenworks C3208101 MO40L4413 MO40L03 MO48L4422 (Black 2 Pack)
Dichallu$36.534.8★
What buyers say about greenworks 21 inch mower blade
What buyers praise and complain about, mined from review topics.What buyers love
“Fits great”
“Cuts Grass Great”
“The quality feels solid”
“Easy to install”
“Worth the money”
“Just as described”
“ready to use”
“Build quality feels solid and durable, especially for the price”
“Strong, sharp and as good or better than the mower manufacturer's blade”
“It feels solid, well-made, and balanced”
What buyers complain about
“it was actually an inch short”
“The profile is also slightly different”
“a bit different shape from Greenworks 333041179”
“Costs More Than OEM Blade”
“The blade is slightly heavier”
“Kinda thin”
“Not as good as the original”
“This blade slowed down my electric mover by like 30-40 percent”
“however my concern is slipping”
“These are all-black, not green”
Top return reasons
Common questions
- Is greenworks 21 inch mower blade profitable to sell on Amazon United States?
- The niche generates $67K/yr across 17 tracked products. 2 of 8 products launched in the last 360 days are still selling. 90-day search growth is +173.5%. Flapen's verdict: Worth a look (55/100).
- How competitive is the greenworks 21 inch mower blade niche?
- 10 brands and 17 sellers compete. The top 5 products take 69% of clicks and top 5 brands hold 87% of demand.
- What do buyers complain about in greenworks 21 inch mower blade?
- Top complaints mined from reviews: Size-Overall, Advertised Vs Actual Product, Shape/Style. The return rate is 2.1%.
- When does demand for greenworks 21 inch mower blade peak?
- Demand peaks in Apr–May–Jun–Jul–Aug; the busiest month runs 18.1× the quietest.
- What does it cost to enter the greenworks 21 inch mower blade niche?
- Listings span $15.64–$38.42; the average listing price is $25.63 (sweet spot $15–$100). The average incumbent carries 653 reviews — the moat a new listing must climb.