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If your mower leaves behind clumps of grass or streaky patches, the blade is the problem. Standard blades just cut the top off, but a mulching blade has curved surfaces and extra serrations that chop clippings into tiny pieces, then blow them deep into the lawn where they decompose naturally. That means you never have to bag or rake — and your grass gets free fertilizer every time you mow. This guide covers the real differences between seven mulching blades, from single 21-inch replacements to 42-inch tractor sets, so you know exactly which one fits your deck and delivers the fine chop you want.
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.
if you need a quick swap for a walk-behind mower or a heavy-duty set for a riding tractor, this roundup of the best mulching blades matches the right blade shape, hole pattern, and width to your specific machine.
Quick Picks
- Grasscool 21″ Mulching Blades (2-Pack) — Best Overall
- EGO POWER+ AB2101D Mulching Blades (2-Pack) — Premium Pick
- Maxpower 331528B 21″ Mulching Blade — Pro Grade
- MaxPower 331387XB Commercial Mulching Blade — Top Performer
- Grasscool 942-04308-X 42″ Deck Mulching Blades — Best Value
- Terre Products 21″ Lawn Mower Blade — Budget Champion
- Budrash 138971 Gator Mulching Blades (2-Pack) — Entry-Level Rider Set
How To Choose The Best Mulching Blades
The single most common mistake buyers make is picking a blade that simply won’t bolt onto your mower’s spindle. The spindle (the rotating shaft the blade attaches to) needs the right hole shape, total blade length, and blade design for your deck size. Here are the three specs you should check before you order anything.
Center Hole Pattern: Bow Tie vs. Star
Walk-behind mowers from Troy-Bilt, Cub Cadet, MTD, and Craftsman almost always use a bow tie center hole — an oval shape with two smaller holes on either side. Riding mowers and zero-turn mowers (mowers that turn on the spot), especially those with 42-inch decks, typically use a 5-point or 6-point star pattern. If you buy a star blade for a bow-tie spindle (or vice versa), the blade will not sit flat and you cannot install it safely. Always lift your mower, remove the existing blade, and compare the hole shape to the images in the product listing.
Length and Deck Size
Most walk-behind mowers use a 21-inch blade. Riding mowers with 42-inch decks usually get two blades that measure about 21 inches each (the actual stamped length often reads 20-27/32 inches or similar). If your deck is 46 or 54 inches, you need a different blade length altogether. Check the blade’s listed overall length, then match it to your mower’s original blade before you buy.
Lift, Coating, and Material
High-lift blades have a pronounced curve that pulls grass upward, cuts it multiple times, then blows the fine clippings back into the turf. A powder coating (a baked-on protective layer) prevents rust during shipping — but note that this coating will wear off during the first mow. Heat-treated steel blades (steel hardened in a furnace) hold their edge longer than standard steel. If you mow thick, wet, or tall grass, thicker steel (around 0.15–0.2 inches) resists bending better than thinner metal.
Quick Comparison
On smaller screens, swipe sideways to see the full table.
| Model | Best For | Length | Center Hole | Weight | Amazon |
|---|---|---|---|---|---|
| Maxpower 331528B | Bow-tie walk-behind builds | 21″ | Bow Tie | 1.6 lbs | $18.28Amazon |
| Terre Products 21″ | Budget single replacement | 21″ | Bow Tie | 1.2 lbs | $19.65$21.59Amazon |
| MaxPower 331387XB Commercial | Toro / Exmark 21″ mowers | 20-27/32″ | 7/16″ Round | 1.82 lbs | $19.88$21.99Amazon |
| Grasscool 21″ 2-Pack | Troy-Bilt / Craftsman walk-behinds | 21″ | Bow Tie | 3.59 lbs (set) | $24.88$26.88Amazon |
| Grasscool 942-04308-X 42″ | Cub Cadet / Troy-Bilt 42″ riders | 21″ each | 6-Point Star | 4.44 lbs (set) | $28.88Amazon |
| Budrash 138971 Gator | Craftsman / Husqvarna 42″ tractors | 21″ | 5-Point Star | 5.29 lbs (pair) | $32.99Amazon |
| EGO AB2101D 2-Pack | EGO 56V cordless mowers | 21″ | Multi-blade system | 2.59 lbs | $49.99Amazon |
In‑Depth Reviews
1. Grasscool 21″ Mulching Blades (2-Pack)
A two-pack that gives you two replacement blades for walk-behind mowers.
You get two 21-inch blades with a bow tie center hole for compatible Troy-Bilt and Craftsman walk-behinds. Each blade uses a high-lift curve (a steep angle that pulls grass up for cleaner cuts) for mulching, bagging, or side discharge.
The cutting edges come painted to resist rust during storage, and the paint wears off after the first cut to reveal sharpened steel. If you are clearing thick grass or overgrown weeds, the manufacturer says you can sharpen the edge yourself to keep a clean finish. Unlike the lighter Terre Products blade at 1.2 pounds, these feel substantial when you hold them — buyers report they are “thick and look durable” even if not razor-sharp fresh out of the pack.
One catch: the blade only fits a bow tie spindle, so if your riding mower uses a star pattern, you need a different pick. For standard push-mower owners, this is the set that saves you a trip mid-season because you always have a spare.
Why it wins
- Two blades at a price that beats buying singles locally
- High-lift design reduces clogging and throws clippings deeper
- Fits a wide range of Troy-Bilt, Craftsman, and MTD walk-behinds
Watch for
- Bow tie pattern only — no use on star-spindle riding mowers
- Some owners mention they could be sharper from the factory
Reach for this if: you own a Troy-Bilt or Craftsman push mower and want a spare blade that pays for itself on day one.
Look elsewhere if: your deck uses a 5-point or 6-point star spindle — the hole pattern simply won’t match.
2. EGO POWER+ AB2101D Mulching Blades (2-Pack)
Genuine EGO blades that swap in five minutes for your Select Cut mower.
If you own an EGO POWER+ 56-volt (56V) cordless mower (a battery-powered mower that uses a 56-volt system) such as the LM2156SP, LM2150SP, LM2135SP, or LM2130, this 2-pack is the direct factory replacement — not a third-party guess. The all-steel blade sits on the interchangeable lower mount of EGO’s Select Cut Multi-Blade System, so you simply remove one bolt, swap the blade, and torque it to the manufacturer’s spec. Customers note a “great mulching” result and say “easy 5-min swap” using the existing hardware. Nuts and bolts are not included, but you reuse what is on the mower.
Each blade measures 20.2 x 1.97 x 0.79 inches and the set weighs 2.59 pounds. Reviewers who mow a third of an acre mention the blade dulls faster than they would like, sometimes needing replacement twice a year. Compared with the Grasscool set at 3.59 pounds, the EGO set weighs 2.59 pounds. The pay-off is a clean cut that promotes lawn health — one buyer says “sharp as originals” and another notes the blade lasts about three seasons on regular use.
What stands out
- Genuine EGO part ensures perfect fit and performance
- Swaps quickly with a socket set in about 5 minutes
- Delivers a clean cut that helps keep the lawn healthy
What to know
- Only compatible with EGO Select Cut mowers — universal? no.
- Some users find the edge wears faster than expected on larger lawns
Grab these if: you run an EGO 56-volt mower and want factory blades without paying dealer markup.
Skip them if: you have a gas mower — the mounting system and torque requirements are completely different.
3. Maxpower 331528B 21″ Mulching Blade
USA-made steel that sharpens itself as the coating wears off.
MaxPower manufactures this 21-inch blade in the USA, which matters if you prefer domestic sourcing. It fits many MTD, Cub Cadet, Troy-Bilt, and Craftsman models. The bow tie center hole uses a 5/16-inch outside hole diameter with a 2.5-inch center-to-center measurement, so it locks onto the spindle without wobbling. At 1.6 pounds, it weighs more than the Terre blade at 1.2 pounds.
The blade is powder coated at the factory, then sharpened underneath. That coating protects against rust during shipping and in the shed, but it comes off on the first pass through the grass. Reviewers point out the blade is “sharp, well-balanced” and that its “excellent mulching creates fine clippings.” Some wish the edge were sharper out of the package, but the thick body handles thick grass without bending. One reviewer noted a four-star experience noting it restored a smooth cut on a 22-inch mower.
Strong points
- Made in the USA with a wide compatibility list
- Powder coating prevents rust before you install it
- Thick blade body holds up in thick, tall grass
Watch for
- Some buyers prefer a sharper edge right from the start
- Single blade only — no spare included
Ideal for: someone with an MTD or Cub Cadet walk-behind who wants an American-made single blade that will not rust in storage.
Not for: riders or anyone with a star center hole — this is strictly bow tie.
4. MaxPower 331387XB Commercial Mulching Blade
Less drag than the original Toro blade — but it may scalp if set too low.
This 20-27/32 x 2-1/4 inch (20.84 x 2.25 inches) commercial-grade blade is designed for 21-inch cut Toro, Exmark, and Lawn Boy mowers. It replaces OEM (Original Equipment Manufacturer) numbers 108-0954-03, 116-4500, and 133-8182-03, and uses a 7/16-inch round center hole — a direct swap for those brands. At 1.82 pounds, it weighs more than the Terre blade at 1.2 pounds. The commercial claim is backed by USA manufacturing and a design that reduces drag (air resistance) compared to the original Toro blade, meaning your engine works a bit less on each revolution.
Shoppers say that the “blades are slightly thinner than OEM but the mulching action is great.” One reviewer mounted it on a John Deere D130 42-inch riding mower and got perfect results, while others put it on Toro Recycler walk-behinds and noticed a “huge difference” in cut quality. The one trade-off: the blade curves lower from the middle, so you may need to raise the deck height to avoid scalping (cutting too low and hitting soil) on uneven ground. At 20.7 x 20.2 x 0.9 inches in the package, it is also the most compact shipping profile of the 21-inch blades.
Why it works
- Commercial-grade build from MaxPower, made in the USA
- Less engine drag than many OEM Toro blades
- Fits a wide range of Toro, Exmark, and Lawn Boy mowers
Keep in mind
- Thinner than some OEM blades — check if thickness matters for your mower
- Lower profile curve can scalp on bumpy lawns at low deck settings
Best for: Toro Recycler owners who want less drag and fine mulching without switching to an aftermarket brand.
Skip if: you have a perfectly flat lawn and want to mow at the absolute lowest deck height.
5. Grasscool 942-04308-X 42″ Deck Mulching Blades
A toothed 3-in-1 blade set that fits Cub Cadet and Troy-Bilt 42-inch riders.
If you own a Cub Cadet XT1-42, ZT1-42, or a Troy-Bilt Bronco Pony 42, this set uses a 6-point star mounting pattern (six points radiating from the center hole) that matches those machines exactly. The package weight is 4.44 pounds and the set includes two 21-inch blades for a 42-inch deck. The toothed edge — each blade has a curved, serrated profile — cuts overgrown grass and weeds more aggressively than a straight edge, while the high-lift shape increases bagging capacity by 50%. Buyers call them “great mulching blades” and note an “awesome quality” fit on Cub Cadet decks.
A critical note: Cub Cadet ZT1-42 and XT1-42 sometimes ship with an “S” shaped mounting pattern (part 742-05177) instead of the 6-point star. You must check your original blade before ordering — this set will not fit the S-pattern. Once confirmed, installation is straightforward: the paint on the cutting edges wears off during the first mow to expose sharp steel, and the blade passes Rockwell hardness (a scale that measures resistance to denting) and V-bend tests at the factory.
Highlights
- Toothed cutting edge handles overgrown grass better than straight blades
- High-lift curve supports mulching, bagging, and side discharge
- Factory-tested for balance, hardness, and chip resistance
Watch out
- Only fits the 6-point star pattern — not the S-shaped mount on some Cub Cadets
- Single set — no spare included
Grab this for: a Cub Cadet or Troy-Bilt 42-inch rider with a 6-point star spindle that needs aggressive mulching of thicker grass.
Not for: anyone with the alternate “S” pattern mounting on a newer Cub Cadet — check your original blade first.
6. Terre Products 21″ Lawn Mower Blade
A 1.2-pound blade that is easy to handle and sharp from the start.
This 21-inch mulching blade weighs 1.2 pounds, while the Grasscool 21-inch set weighs 3.59 pounds. That means less rotational mass for your mower engine to spin, which can help if you have a smaller or older walk-behind. It replaces the same OEM numbers as the Maxpower blade — 742-0741A, 942-0741A, and others — and uses a bow tie center hole to fit Craftsman, Troy-Bilt, and Cub Cadet decks. The blade is forged from heat-treated, high-strength steel and finished with an anti-rust powder coating.
Buyers report it is “nice and sharp” and “cut through thick grass like butter.” One buyer mentioned, “I have almost a full mowing season on it,” and plans to sharpen it at the end of the season to check wear. Because the blade is lighter, it may not generate the same lift force as the thicker MaxPower or Grasscool blades, so dense, wet grass might need a second pass. But for a single-blade replacement at an entry-level price, the value is clear: it is factory-sharpened, factory-balanced, and field-tested before shipping.
Good points
- Lightest blade reduces strain on smaller mower engines
- 3-in-1 design supports mulching, bagging, and side discharge
- Heat-treated steel with anti-rust coating adds durability
Trade-offs
- Thinner and lighter — less effective in tall or wet grass than heavier blades
- Single blade only, so no spare for later
Pick this if: you need a cheap, sharp, single blade for a small walk-behind mower and you mow dry, moderate-length grass.
skip it if: you often tackle overgrown or damp grass where a heavier blade with more lift would clean up faster.
7. Budrash 138971 Gator Mulching Blades (2-Pack)
A 2-pack of toothed gator blades built for Craftsman and Husqvarna 42-inch riders.
This set from Budrash replaces OEM numbers 134149, 138971, and 127843 on Craftsman LT1000, YT3000, and Husqvarna YTH1842 models — any 42-inch deck with a 5-point star center hole. Each blade measures 21 inches long, 2.5 inches wide, and 0.197 inches thick, and the pair weighs a solid 5.29 pounds. The toothed gator design cuts and recuts clippings into fine pieces that settle into the lawn as natural fertilizer, and the high-lift curve reduces clumping even when the grass is slightly damp. Buyers call the blades “tough and thick” and report “superior mulching performance” with “fine grass chopping.”
One limitation to consider: owners mention the blades are “not ideal for bagging” because the high lift pushes clippings out toward the discharge rather than up into the bag. If you mainly bag clippings, you may get better results with a standard lift blade. Installation uses a 5-point star pattern and the lift side must face the deck for proper airflow — a simple bolt-on process that reviewers call “easy install on 42-inch tractors.” The steel thickness (0.197 inches) and black coating help it survive rocky soil and hidden branches.
What we like
- Toothed edge chops grass finer than a standard gator blade
- Thick 0.197-inch steel resists bending on debris
- Direct replacement for dozens of Craftsman and Husqvarna 42″ mowers
Limitations
- Not designed for bagging — better at mulching and side discharge
- Only fits 5-point star pattern, so bow-tie mowers cannot use it
Go for this if: you have a 42-inch Craftsman or Husqvarna rider and want a tough mulching blade that handles damp grass without clumping.
Look elsewhere if: you primarily bag your clippings — a standard blade would push more grass into the bag.
Understanding the Specs
Center Hole Pattern
This is the single most important spec to check before buying. Walk-behind mowers from Troy-Bilt, Cub Cadet, MTD, and Craftsman use a bow tie pattern — a pair of small holes on either side of a larger center hole. Riding mowers and zero-turn mowers with 42-inch decks usually take a 5-point or 6-point star pattern. If you buy the wrong pattern, the blade will not sit flush and you cannot install it safely. Always pull your old blade and compare the hole shape to the new one.
Blade Lift (High vs. Low)
The curved angle of the blade — called lift — determines how much air it moves. High-lift blades pull grass upward so the cutting edge shears it cleanly, then blow the clippings into the bag or onto the lawn. Low-lift blades move less air and work better on dry, short grass but struggle with thick or damp turf. All the blades in this guide are high-lift designs because mulching requires strong airflow to keep clippings suspended for multiple cuts.
FAQ
Can I put a mulching blade on any mower?
How often should I replace mulching blades?
Do mulching blades work in wet grass?
What is the difference between a gator blade and a standard mulching blade?
Will a 21-inch mulching blade fit my 22-inch mower deck?
How do I know if my mower has a bow tie spindle or a star spindle?
Are expensive mulching blades worth the extra cost?
Can I sharpen a mulching blade myself?
Do I need to replace all blades on a riding mower at the same time?
What does a powder coating do on a mower blade?
Final Thoughts: The Verdict
If you want one dependable pick, the best mulching blades winner is the Grasscool 21-inch 2-Pack because it gives you two heat-treated blades with a high-lift curve at a price that beats a single OEM blade from the local store. If you own an EGO cordless mower, grab the EGO AB2101D 2-Pack — it is the genuine factory replacement that swaps in five minutes. And for a 42-inch riding tractor that sees tough, overgrown grass, the Budrash 138971 Gator 2-Pack delivers the thickest steel and the most aggressive toothed mulching action in this lineup.
How We Picked
We do not accept paid placement, and we did not hands-on test every unit. Instead, we match each pick to a real buyer and use-case by comparing the manufacturers’ published specifications against the patterns in verified customer reviews — so you get each pick’s real strengths and trade-offs instead of marketing copy.
Sources & Methodology
Specifications: manufacturer listings and product documentation. Review insights: verified customer reviews, as of July 2026. Pricing: not shown on this page (it changes often); check the current price via the retailer link.
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