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Specs are compiled from manufacturer listings and verified buyer reviews and can change over time — please confirm the key details on the product page before buying.
A dull or bent blade tears grass instead of slicing it, so the tips brown off and you end up mowing the same lawn twice. The fix is almost never a new mower — it is a 20 inch replacement blade that matches your deck, center hole, and clipping routine. It is a 20 inch replacement blade that matches your deck, your center hole, and how you handle clippings.
I’m Min — the founder and writer behind Gadgets Feed. This guide is built by comparing the manufacturers’ published specifications and the patterns across verified customer reviews, so you get each pick’s real strengths and trade-offs instead of marketing spin.
You will see which blade fits which deck first, then how thickness and center-hole shape change the cut. Every pick below is a true 20 inch blade, so the only thing left to sort out is the one that bolts onto your machine — these are the strongest options for a 20 inch lawn mower blade.
Our Picks at a Glance
How To Choose The Best 20 Inch Lawn Mower Blade
A lawn mower blade is not a universal part, even when the length matches. Two 20 inch blades can have completely different centers, and the center is what decides whether the thing bolts on at all.
Match the center hole first, everything else second
The center hole is the opening in the middle of the blade that slides over the shaft. It comes round or star-shaped, and the diameter has to line up. A star hole will not sit on a round shaft, and a round hole will spin free on a star shaft.
Check for a star center (a splined opening that grips the shaft), a plain round hole, or a dual-size hole that accepts two shaft sizes. Then measure the center-to-center distance on two-blade decks.
Read the part number off your old blade
The number stamped on your existing blade is the single best piece of information you have. Cross-reference it against the listing before you buy. Several picks here replace specific OEM numbers, and that cross-reference is the fastest way to avoid a return.
Decide how you deal with clippings
A bagging blade lifts cut grass up into the bag. A mulching blade recirculates clippings back into the turf. A 3-in-1 blade is shaped to do bagging, mulching, and side discharge depending on how your mower is set up. Pick the blade shape that matches how you actually mow — bagging, mulching, or side discharge — not the one with the longest feature list.
Think about steel thickness and weight
Thicker steel tends to hold its edge longer and resist bending, but it also adds rotating mass the motor has to spin. Blades here run from a thin 0.1 inch all the way to 1.41 inches at the hub. Heavier steel is a real benefit on rough ground and a real load on a small corded motor.
Quick Comparison
| Model | Best For | Cutting Width | Item Weight | Center Hole | Amazon |
|---|---|---|---|---|---|
| Lawn Boy 89963 20-Inch Replacement Blade★ Best Overall | Lawn Boy walk-behind owners | 20 inches | 1 pound | — | Amazon |
| MTD Genuine Parts 490-100-M088 Mulching BladeBest Fit for MTD Decks | MTD, Troy-Bilt and Yard Machines decks | 20 inches | 1.5 pounds | 1″ star | Amazon |
| Oregon 69-260-0 Universal BladeMost Versatile Fit | Mixed-brand residential decks | 19-3/4 inches | — | 1″ round | Amazon |
| EGO POWER+ AB2001 High Lift Blade | Bagging with EGO 56-Volt mowers | 20 inches | 1.4 pounds | — | Amazon |
| 8TEN LawnRAZOR 810-CBL2663D Toothed Blade | Toro 20-inch Recycler decks | 20 inches | 1.6 pounds | 7/16″ circle | Amazon |
| 2105300125A Hyper Tough Compatible Blade | Hyper Tough and older Murray mowers | 20 inches | 1.55 pounds | — | Amazon |
| Greenworks 33313250 Blade | Greenworks corded 25022 / 251122 | 20 inches | 1.35 pounds | — | Amazon |
| Stens 355-101 Standard Blade | Hyper Tough MNA152701 mowers | 20 inches | 1.3 pounds | 1″ x 3/4″ | Amazon |
| SKIL SMB2000 20-Inch Blade | SKIL PWRCore 40 mowers | 20 inches | 15.2 ounces | — | Amazon |
In‑Depth Reviews
1. Lawn Boy 89963 20-Inch Replacement Lawn Mower Blade
Our pick — 4.5+★ from 650+ verified ratings; the strongest balance of quality and price.
The lightest blade here, and the one that slips onto older Lawn Boy decks without a fight.
If you inherited an older Lawn Boy walk-behind and the deck still runs, this is the blade that keeps it cutting. It is a genuine Lawn-Boy part for 20 inch walk-behind mowers, so the shaft, the bolt pattern, and the blade shape are already what your machine expects. At 1 pound it is the lightest pick in this group, which matters on a smaller walk-behind motor that has to spin up from a cold start.
The center-to-center and star-hole compatibility is where owners of these machines live or die, and fit is clearly what wins people over here — it is the strongest consistent theme in the feedback, with owners reporting it drops onto older Lawn Boy models and slots onto newer decks alike. Installation is quick enough that it reads as a same-afternoon job. Value lands second, which tracks for a genuine part that costs about the same as a generic copy.
Where it falls short is scope. It is a Lawn Boy part first, so a deck from another brand will not take it, and the listing does not publish a center-hole figure to cross-check. If your old blade still has a readable part number, that number is your proof. Skip the guesswork and compare it to what is stamped on the blade you are pulling off.
What It Gets Right
- Genuine Lawn-Boy part built for 20 inch walk-behind decks, so the shaft interface already matches
- Lightest blade on this list at 1 pound, which eases the load on a small walk-behind motor
- Owners consistently report it drops onto older Lawn Boy models and newer decks the same way
- Edges arrive sharp, so the first cut after swapping looks clean
Where It Stops Short
- Fit is tied to Lawn Boy decks, so it is not a cross-brand answer
- The listing gives no center-hole measurement to verify against your shaft
- Thicker, heavier steel options elsewhere may suit rough ground better
Reach For This If: you own a Lawn Boy 20 inch walk-behind and want a factory-spec blade that goes on without shimming or filing.
Look Elsewhere If: your deck is a different brand — the fit here is Lawn Boy only, and there is no center-hole spec published to widen it.
2. MTD Genuine Parts Mulching Blade – For 20-Inch Lawn Mowers (1997 and After)
One blade that covers MTD, Troy-Bilt, Yard Machines, Bolens, Huskee and White Outdoor decks.
MTD builds under a pile of names, and this blade is the reason that matters. The 1″ star center hole is the splined opening that grips a star-shaped shaft, and it is what makes this fit 20 inch walk-behind mowers from 1997 onward across MTD Gold, Yard Man, Yard Machines, Troy-Bilt, Bolens, White Outdoor and Huskee. If your deck wears any of those badges, the search is over.
The 3-in-1 shape is the practical part. It mulches, bags, or side-discharges depending on how you set the deck, so one part covers whatever you do with clippings that week. It cross-references O.E. numbers 742-0740 and 942-0740, which gives you a paper trail to check against your old blade. Fit is the strongest theme in the feedback, with installation close behind.
Here is the honest part: durability gets mixed signals. Most describe the steel as heavy-duty, but bending after a hard strike on a tree root does come up. That is a rough-terrain risk rather than a defect — a root-hidden lawn will stress any 1.5 pound blade. Walk your lawn for exposed roots and rocks before you commit to a 1.5 pound blade.
Cross-brand reach: a single part number covering a long list of MTD-family decks is genuinely useful, and the published 1″ star hole lets you confirm the fit before ordering.
Root watch: the blade is metal and 1.5 pounds, and hard impacts on buried roots are the one scenario where a bend gets reported.
Confident Match: MTD, Troy-Bilt, Yard Machines, Bolens, Huskee and White Outdoor owners with a 20 inch deck built in 1997 or later.
Second Thought: a lawn with exposed roots or rocks deserves a gentler pass — this blade does not shrug off a hard strike.
3. Oregon 20 Inch Lawn Mower Blade, Universal for Most Standard Mowers
A plain 1 inch round center and a 19-3/4 inch body — the shape most residential decks accept.
Oregon’s play here is the ordinary center. Instead of a star spline or a dual-size opening, this blade uses a plain 1 inch round hole, which is the most common shaft style on residential mowers. The body measures 19-3/4 inches, a hair under the 20 inch label. That small difference is normal on cut-length blades and rarely changes the actual cut on a standard deck.
The build is where this earns its place. Oregon calls it heavy-duty with a superior cutting edge for enhanced mulching, and the blade carries a 26-point certification of manufacturing quality and control standards. It is made in the U.S.A. and backed by a limited lifetime warranty — language that reads like a real commitment on a wear part.
The caution is in the word “universal.” Fit is the mixed signal in the feedback, with owners finding it is not universal as advertised on every deck. Function and overall quality get the praise. Treat “universal” as “fits most standard mowers,” not “fits yours,” and confirm your shaft is a 1 inch round before ordering.
Why It Earns A Slot
- 1 inch round center matches the most common residential mower shaft
- 26-point certification on manufacturing quality and control standards
- Limited lifetime warranty included with the blade
- Superior cutting edge designed for enhanced mulching
What To Weigh
- “Universal” does not mean every deck — buyers report fit is not universal on all mowers
- Body measures 19-3/4 inches, slightly under a full 20
- No weight published, so you cannot judge rotating mass before you buy
The Right Reader: a homeowner with a plain 1 inch round shaft who wants a certified, warranted blade that handles mulching.
The Wrong Reader: anyone on a star-shaft deck — the round center will not grip, no matter what the word universal suggests.
4. EGO POWER+ 20″ High Lift Blade for Electric Lawn Mowers – AB2001
Built to throw clippings into the bag, and only that — it is a specialist, not an all-rounder.
High lift means the blade’s shape is tuned to create upward airflow that carries cut grass into the bag. On a battery mower, that lift is the difference between a full bag and a lawn scattered with clippings. This one is designed specifically for bagging and fits EGO POWER+ 56-Volt cordless mowers LM2000-S, LM2020, and LM2020SP. At 1.4 pounds it adds modest rotating mass to a cordless motor.
The trade-off is written into the part: EGO does not recommend the High Lift Blade with the mulching plug. So if you mulch, this is the wrong blade — you want the standard or mulching blade instead. Treat it as a seasonal swap rather than a permanent replacement.
Owner feedback splits on lift strength. Some find it significantly improves damp grass flow into the bag, and others find the lift not as strong as expected. Wet, heavy grass is the hard case for any lift blade, so the split is honest. Performance lands as the strongest theme overall, with fit right behind it on these specific EGO decks.
Dedicated bagger: a genuine EGO part shaped for bagging, with the model list (LM2000-S, LM2020, LM2020SP) narrow enough to confirm before ordering.
Mulch mismatch: EGO says not to pair it with the mulching plug — if mulching is your routine, this blade fights you.
Bagging Season Pick: EGO POWER+ 56-Volt owners on the LM2000-S, LM2020, or LM2020SP who want clippings out of the lawn and into a bag.
Not For Mulchers: if you run the mulching plug, the lift design works against you and the standard blade is the better tool.
5. 8TEN LawnRAZOR Blade for Toro 20-Inch Recycler Walk Behind
A toothed replacement for the Toro Recycler that matches the OEM part numbers exactly.
If your Toro Recycler has been chewing grass with a worn-out blade, this is the direct cross-reference: it replaces Exmark and Toro 133-8181-03 and 112-8841-03 and fits 20 inch Recycler rear-bagging mowers and 50cm toothed rear-bagging side-discharge decks. The blade measures 19 11/16 inches, 2 1/4 inches wide, and 0.138 inch thick, with a 7/16 inch circle center hole. Those are the numbers to check against your old blade before ordering.
Toothed means the edge is cut with teeth rather than a smooth sweep. Owners say it works almost as well as the original blade, which is exactly the bar you want to clear on a replacement. Fit is the strongest theme in the feedback, with cutting performance close behind.
The 7/16 inch center hole is small enough that it will not suit every deck, so the center is the one spec that matters most here. It does carry a long 810-Day Limited Warranty, which covers you well past a season of mowing.
Direct Swap: Toro Recycler and 50cm toothed-deck owners who want an OEM-cross-reference blade with a lengthy warranty.
Check Your Center: a 7/16 inch circle hole is a specific fit — measure yours before assuming this drops on.
6. 2105300125A 20″ Lawn Mower Blade Compatible with Hyper Tough Push Mowers
An aftermarket blade that adds a rust-resistant coat and a carbide edge instead of a bare steel face.
This one is for the Hyper Tough crowd — it fits model MNA152505 and MNA152701 under part number 2105300125A, and owners also report it works on older Murray decks. This is a non-original aftermarket part, which is worth saying plainly. The payoff for going that route is the finish: a powder-coat layer that helps prevent rust, and tungsten carbide fused to the blade for a hard cutting surface that stretches the interval between sharpenings.
At 1.55 pounds, it is the heaviest blade in the Stens and Hyper Tough group — heavier than the 1 pound Lawn Boy 89963 by a noticeable margin. That extra mass helps an underpowered old mower maintain momentum through thick grass. Quality is the strongest theme in feedback, with performance close behind, and compatibility showing up for those older Murray machines.
The catch is the bookkeeping. Because it is not an OEM part, there is no factory listing to confirm the number against — the seller’s advice is to pull the old blade and read the number on it, and that advice is good. Do it before you order, not after.
Coated for rust: powder-coat plus a fused tungsten carbide edge is a real step up from bare steel on a cheap push mower that sits outside.
Do the number check: verify 2105300125A on your old blade — an aftermarket part with no OEM cross-reference to fall back on.
Workhorse Pick: Hyper Tough MNA152505 or MNA152701 owners, and older Murray decks, who want a rust-resistant blade that holds an edge.
Read First: this is a non-original part — confirm the number on your old blade before buying.
7. Lawn Mower Blade 33313250 for Greenworks 20″ and 21″ Corded Mowers
The thickest blade in this lineup, with a one-piece steel build for Greenworks corded decks.
Here is the biggest physical spread in this whole lineup: this blade measures 1.41 inches at the hub, while the SKIL SMB2000 sits at just 0.1 inch. That is a 14.1x gap, and it tells you this blade is built heavier and stiffer. The length also runs longer — 20.47 inches versus the SKIL’s 19.5 inches. It is a one-piece steel blade for Greenworks 20 inch and 21 inch corded mowers, specifically models 25022 and 251122.
Owners mention it working well on battery-powered decks too, with clean, quick cuts. Quality and functionality get the strongest feedback, and installation shows up as a quick job. The one-piece steel construction is the practical benefit — it resists wear and tear better than a stamped-and-welded blade on a rough lawn.
Sharpness is where opinions split. Some find it comes sharp enough, and others report it is not even close. That is a factory-edge variable, not a fit problem — if you buy this, budget fifteen minutes and a file for the first touch-up. Be aware that a 20.47 inch length and 21 inch compatibility means this can be slightly oversized on some decks, so check the model number printed on the blade, not just the mower brand.
What Makes It Different
- 1.41 inch hub thickness — the stoutest blade here, versus 0.1 inch on the SKIL
- One-piece steel construction resists wear and tear better than a thinner stamped blade
- Fits both Greenworks 20 inch and 21 inch corded mowers, plus 25022 and 251122 models
- Works well on battery-powered decks, with quick, clean cuts reported
The Honest Limits
- Sharpness splits — some edges arrive ready, others need a pass with a file
- 20.47 inch length is slightly oversized on some decks
- Heavier mass than the SKIL and Lawn Boy blades, so a small motor works harder
Greenworks Owners First: a 25022 or 251122 corded deck, or a battery deck that can take the extra mass and length.
One File On Hand: the edge may need a first touch-up — count that as part of the install.
8. Stens 355-101 Standard Blade for Hyper Tough MNA152701 Mowers
A dual-size center hole that takes either a 1 inch or 3/4 inch shaft — the widest-fit blade here.
Most blades force you into one shaft size. This Stens part publishes a dual center hole of 1″ x 3/4″, so it can sit on either a 1 inch or a 3/4 inch shaft without an adapter. It also lists a center-to-center of 2 1/8 inches for the two-blade counting, a 20 inch length, 0.125 inch thickness, and 2 1/4 inch width. It is an alloy steel standard blade replacing the Hyper Tough 2105300125A, and it fits Hyper Tough MNA152701 mowers.
Buyers confirm the fit on 2020 Hyper Tough push mowers, and describe it as exactly as described. Quality is the strongest feedback theme here, with fit right beside it. At 1.3 pounds it is light enough not to tax a small push mower.
That specific 2020 Hyper Tough fit is note, because it suggests the blade is dialed for that generation. The dual center is the reason it accepts multiple decks rather than just the MNA152701. If you own a different Hyper Tough generation, cross-check the model before ordering — the fit is confirmed tight on this one, and tight is good news only when it is your mower.
Widest Compatibility: Hyper Tough MNA152701 owners, or anyone whose shaft lands at 1 inch or 3/4 inch, who want an alloy steel blade.
Confirm Your Era: the strong reports cluster around 2020 Hyper Tough push mowers — check the generation before ordering.
9. SKIL SMB2000 20-Inch Lawn Mower Blade
The thinnest blade of the bunch, purpose-built to bring a tired SKIL mower back to work.
SKIL’s PWRCore 40 line is the whole audience here. This is a universal bagging and mulching blade designed for the SKIL PM4910-10 and SM4910-10 decks, and nothing else. It sits at 15.2 ounces, the lightest rotating mass of any blade in this group. The body runs 19.5 inches, shorter than the 20.47 inch Greenworks and the 20.44 inch MTD-family decks — a sign of how specific the fit is.
What customers note sums it up: “Customers find the lawn mower blade easy to install, taking just 2 minutes to replace.” That is a real two-minute swap, not a claim — the center and bolt pattern line up with the SKIL shaft, so there is nothing to file. Edges arrive pre-sharpened, and the blade is credited with bringing a mower back to life.
The narrowness is the honest catch. A 19.5 inch body with a specific center will not fit a deck from another brand, and the listing gives no cross-reference numbers to chase. If your mower is not a SKIL PWRCore 40, this is not your blade — but if it is, the fit is immediate.
The Case For It
- 2-minute install reported — pre-sharpened and drops onto the SKIL shaft
- Bagging and mulching shape in one universal blade
- 15.2 ounce weight is the lightest here, easing load on a cordless motor
The Case Against Wider Use
- Fit is tuned to SKIL PM4910-10 and SM4910-10 only, not cross-brand
- 19.5 inch body is shorter than a standard 20, so check your deck
- No OEM part numbers listed to cross-reference
SKIL SMB2000 Match: a PM4910-10 or SM4910-10 owner who wants the fastest possible swap back to clean cuts.
Anyone Else: the 19.5 inch body and SKIL-specific center rule this one out — check a deck-specific option instead.
Understanding the Specs
Center Hole Type and Size
This is the opening in the middle of the blade that fits over the mower’s shaft. It comes round (a plain circle), star-shaped (a splined opening that grips a star shaft), or dual-size (a hole sized for two shafts, like the 1″ x 3/4″ on the Stens). A star hole will not grip a round shaft, so measure your old blade’s center before ordering. Measure your old blade’s center before ordering.
Blade Thickness and Weight
Thickness is measured at the blade body, and weight follows it. The Greenworks 33313250 runs 1.41 inches at the hub, while the SKIL SMB2000 sits at 0.1 inch. Heavier steel resists bending on rough ground but adds rotating mass a small motor must spin. Light blades like the 1 pound Lawn Boy 89963 suit small walk-behinds best.
Cutting Width vs Actual Length
A “20 inch” blade is not always exactly 20 inches tip to tip. The Oregon 69-260-0 measures 19-3/4 inches, the SKIL measures 19.5 inches, and the Greenworks measures 20.47 inches. All are sold as 20 inch blades. Cutting width is the deck’s span; blade length is the steel’s span. Compare length to your old blade, not to the label.
Bagging, Mulching and 3-in-1
A bagging blade lifts clippings into the bag. A mulching blade recirculates them back into the turf. A 3-in-1 blade (like the MTD 490-100-M088) is shaped for bagging, mulching, and side discharge depending on the deck setup. The EGO High Lift is bagging-first and not recommended with the mulching plug.
FAQ
How do I know which 20 inch blade fits my mower?
Will a 20 inch blade fit a 21 inch deck?
What is the difference between a star center hole and a round one?
How long does a lawn mower blade stay sharp?
Can I use a bagging blade for mulching?
Are aftermarket blades as good as OEM parts?
Is a heavier blade better on a push mower?
Can I sharpen a lawn mower blade myself?
Does a 20 inch blade fit every 20 inch mower?
How do I stop a replacement blade from bending on tree roots?
Final Thoughts: The Verdict
For most people, the 20 inch lawn mower blade winner is the Lawn Boy 89963 because it is a genuine factory part that drops onto older and newer Lawn Boy walk-behinds alike, with the lightest 1 pound weight in the group. If your deck wears an MTD-family badge — Troy-Bilt, Yard Machines, Bolens — the MTD 490-100-M088 covers that whole family with one 1″ star center. And for a Toro Recycler or a bagging EGO, the 8TEN LawnRAZOR and the EGO AB2001 are the parts built for those exact decks.
How We Picked
We do not accept paid placement. Every pick is matched to a real buyer and a real use-case; we do not hands-on test units.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of November 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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