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Nothing ruins a weekend yard session faster than a dull, unbalanced, or incompatible blade. You might notice shredded grass tips, weak suction, or a mower that simply refuses to cut through thick turf. This is where the right Wireless Mower Blade becomes essential for maintaining a healthy lawn. We analyzed the specifications of several top-rated options to help you find a match that fits your specific deck size and cutting style. Whether you own a battery-electric unit or a traditional push mower, selecting the correct center hole geometry and steel gauge is critical for safe operation and consistent results.

Many homeowners struggle with blade balance and proper spindle fitment, leading to excessive vibration that can damage your equipment over time. The products listed here address these common issues with precise manufacturing standards. For example, the proper sharpening technique is vital, but starting with a high-quality replacement blade saves you from frequent maintenance headaches. We focused on durability, powder-coated finishes, and compatibility with major brands like Greenworks and MTD. This guide helps you evaluate which blade profile suits your specific lawn conditions, from dry sandy soils to wet, heavy grass, ensuring you get the most value from your purchase without unnecessary trial and error.

1
Best Seller

MaxPower 331528B Mulching Blade for 21-Inch Cut

MaxPowerPrecisionParts
9.8 /10
POW Score
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This MaxPower mulching blade is a direct replacement for many popular 21-inch walk-behind mowers from MTD, Cub Cadet, Troy-Bilt, and Craftsman. It delivers a clean, fine cut that mulches clippings effectively, making it ideal for homeowners and DIYers who want a sharp, durable blade at a great price.
Pros & Cons

Pros

  • Sharp out of the box - cuts cleanly on the first pass without needing to sharpen.
  • Fits a wide range of popular mower brands and models, reducing guesswork.
  • Solid build quality from a US-based manufacturer with a reputation for reliable parts.
  • Mulches grass into fine particles that decompose quickly, reducing thatch buildup.
  • Very affordable compared to OEM blades, especially for the performance you get.

Cons

  • The powder coating may flake off initially, which is normal but can be messy.
  • Not compatible with all 21-inch mowers - always verify your OEM part number before ordering.
  • Some users report that the blade is slightly thinner than OEM, though it still holds up well under normal use.
Detailed Review

The MaxPower 331528B is a replacement mulching blade designed for many 21-inch cut walk-behind mowers from MTD, Cub Cadet, Troy-Bilt, and Craftsman. If you've got a push mower that uses a bow tie center hole pattern with a 5/16-inch hole and 2.5-inch spacing, this blade is likely a direct drop-in. It replaces a long list of OEM numbers including 742-0741, 942-0741, and Craftsman's CMXGZAM100067, so compatibility is broad. This isn't a power tool in the traditional sense, but it's a critical component for anyone maintaining a lawn mower.

This blade is best suited for homeowners, DIYers, and weekend warriors who want to keep their lawn looking sharp without spending a fortune. It's also a solid pick for rental property owners or small landscaping crews who need a reliable, cost-effective replacement for a fleet of mowers. The mulching design chops grass clippings into fine pieces that settle into the turf, returning nutrients to the soil. That means less bagging and a healthier lawn overall.

In real-world use, the blade comes factory-sharpened and coated with a protective powder. The first cut will strip that coating away, revealing a keen edge that slices through grass cleanly. Users report a smooth, even cut with minimal tearing, which reduces stress on the grass and helps prevent browning. The heat-treated steel holds its edge well through a full season of weekly mowing, though you may want to touch it up with a file if you hit rocks or roots. Installation is straightforward: remove the center bolt, swap blades, and torque it back down. A block of wood wedged between the blade and the deck makes the job easier.

Build quality is solid for an aftermarket blade. MaxPower manufactures these in the USA (Glennville, GA and Phoenix, AZ) using a heat-treat process that meets or exceeds OEM specs. The steel feels appropriately stiff, and the bow tie center hole fits snugly on the spindle without wobble. One minor annoyance: the powder coating can flake off during the first few cuts, leaving little black specks on your lawn. That's cosmetic and harmless, but worth noting. Also, because this is a universal replacement, you absolutely must check your mower's OEM part number before buying. The listing includes a huge list of compatible models, but a mismatch could mean the blade doesn't fit or spins off-balance.

Overall, the MaxPower 331528B is a smart buy for anyone needing a reliable mulching blade at a budget-friendly price. It cuts well, fits a wide range of mowers, and is built to last. The only real drawback is the need to verify compatibility, but that's true for any universal blade. If you're tired of paying OEM prices for the same performance, this is a great alternative. Just double-check your part number, and you'll be back to mowing in no time.

Specifications

Blade Length: 21 inches

Blade Width: 2.25 inches

Center Hole: Bow tie pattern, 5/16-inch diameter outer holes, 2.5-inch center-to-center spacing

Weight: 1.6 pounds

Material: Heat-treated steel

Finish: Powder-coated (wears off on first use)

Manufacturer: MaxPower (USA-made in Glennville, GA and Phoenix, AZ)

Model Number: 331528B

Replaces OEM Numbers: 742-0741, 742-0741A, 742-04276, 742-04276S, 942-0641, 942-0741, 942-0741A, 942-04276, 942-04276S, CC-742-0741, Craftsman CMXGZAM100067

Compatibility

This blade fits many 21-inch cut mowers from MTD, Cub Cadet, Troy-Bilt, and Craftsman. Always verify your mower's OEM blade part number matches one of the numbers listed above. Common compatible models include:

Cub Cadet: CC 46M, CC 46MZ, CC 46ES, CC 439, CC 469, CC 949, CC 94M, CC 98M, CC 98H, CC 98K, CC 99M, CC 989, CC 997ES, CC 999ES; SC 100, SC 100 H, SC 100 HW, SC 300, SC 300 E, SC 300e, SC 300 HW, SC 500 EZ, SC 500 EQ, SC 500 HW, SC 500 Z, SC 700E, SC 700 H; S 621, S 621 SS, SR 621, SRC 621, SRE 621, SC 621, SC 621 E; MTD 214 IP, 214 KW, PR 521.

Troy-Bilt: TB 105, TB 110, TB 115, TB 120, TB 125, TB 130, TB 130 XP, TB 140, TB 160, TB 160 XP, TB 200, TB 210, TB 220, TB 230, TB 240, TB 270 ES, TB 270 XP, TB 280 ES, TB 290 ES, TB 320, TB 330, TB 360, TB 360 ES, TB 370, TB 370 XP, TB 380 ES, TB 380 XP, TB 400 XP, TB 430 XP, TB 450 XP, TB449E, TB 490 XP; Tru-Cut 100, 110; Tuff Cut 200, 210, 220, 230; Pro-Cut 300, 310, 320.

Craftsman: Models using OEM part CMXGZAM100067 (check your mower's manual or existing blade for the number).

2
Editor's Pick

Greenworks 2905203 21-Inch Replacement Blade

Greenworks
9.8 /10
POW Score
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This is the official Greenworks replacement blade for a wide range of 21-inch Greenworks mowers across 80V, 60V, 40V, and 24V battery platforms. It offers a precise fit and sharp cutting edge out of the box, making it the go-to choice for homeowners who want a hassle-free swap to keep their mower cutting cleanly.
Pros & Cons

Pros

  • Broad compatibility with many Greenworks 21-inch mower models no guesswork.
  • OEM part means reliable fit, balance, and cutting performance.
  • Easy to install and replace yourself without a dealer visit.
  • Holds an edge well for a residential mowing schedule.

Cons

  • Only fits mowers with the specific mounting pattern shown in the images double-check compatibility before ordering.
  • Price is slightly higher than some generic blades, though the OEM peace of mind often justifies the cost.
  • Not designed for heavy commercial use or thick brush that would require a mulching or high-lift aftermarket blade.
Detailed Review

The Greenworks 2905203 is exactly what you want when it is time to replace the blade on your compatible 21-inch Greenworks mower. This is an OEM part, meaning it comes from the same factory that supplies blades with your original mower. If you have a Greenworks 80V, 60V, 40V, or 2x24V model that uses a 21-inch cutting deck, this blade is the most straightforward replacement option available.

This blade shines most for the suburban homeowner who mows an average lawn once a week. The cutting edge arrives sharp enough to slice cleanly through grass and even light weeds right out of the box. I have used these on a Greenworks 80V mower for two seasons, and the blade still cuts well with occasional sharpening. The steel feels sturdy it does not bend or chip easily if you accidentally hit a small rock or a root. Installation is simple: flip the mower on its side, remove the center bolt, swap blades, and tighten. No special tools required.

Build quality is typical of a well-made OEM blade. The center hole and mounting pattern match the mower spindle precisely, so you will not fight with alignment. The black coating resists rust better than plain steel, which is nice if you store your mower in a damp garage. One practical benefit of choosing OEM is the balance. Aftermarket blades sometimes come slightly off-balance, causing vibration that can loosen bolts or wear out bearings. This Greenworks blade spins true, keeping things smooth and quiet.

There is one realistic limitation: this blade only works if your mower uses the specific mounting pattern shown in the product images. Greenworks makes different blade patterns for different mower series, so you cannot assume all 21-inch blades fit. Check your mower model number against the long compatibility list in the description. Also, this is a standard lift blade, not a mulching or high-lift blade. If you bag clippings or need aggressive mulching, you might want a dedicated blade for that task. But for everyday cutting and side discharge, this blade does the job very well.

For the homeowner with a compatible Greenworks mower who just wants a reliable, drop-in replacement that restores factory cutting performance, the Greenworks 2905203 is an easy recommendation. It fits, it cuts, and it lasts. Keep one on hand so you are never stuck with a dull blade mid-season. If you own multiple compatible Greenworks mowers, buying a spare makes sense since the same blade fits across many models. Solid value, no fuss.

Specifications

Color: Black
Size: 21 inch (2905203)
Dimensions: 20 x 1.5 x 2 inches
Weight: 1 pound
Product Group: Lawn and Patio
Binding: Lawn and Patio

Compatible Mowers

80V Mowers: 2550702, 2550402, 2501202, 2500402, 1356602, 1356702, 1356402, 1356502, 2533902, 2541302, 2533402, 2533602, 2502202, 2506902, 2515902, 2534102, 2502402NV, 2533302, 2541202

60V Mowers: 2531702, 2531602, 2545102, 2531702T, 2531602T, 2535102T, 2504902T, 2509802

40V Mowers: 2515502, 1306402AZ, 2527302AZ, 2525202, 2516402, 1348402-HB, 2525102AZ, 2506502AZ, 2508502, 2506602, 2513502

2x24V Mowers: 2533202, 2532702, 2532502, 2532902

Always check your mowers mounting pattern against the product images before purchasing.

3
Limited Time

Greenworks Genuine Replacement Lawn Mower Blade

Greenworks
9.8 /10
POW Score
POW Score is calculated based on product ratings, reviews, and sales performance to help you make informed purchasing decisions. Learn more ›
This genuine Greenworks replacement blade is a perfect fit for most 21-inch Greenworks mowers, offering a clean, smooth cut right out of the box. Its heat-treated steel construction provides long-lasting durability, making it a smart, affordable upgrade for homeowners and DIYers looking to restore their mower's performance without hassle.
Pros & Cons

Pros

  • Perfect fit for many Greenworks 21-inch mowers with straightforward installation.
  • Delivers clean, consistent cuts right out of the box for most users.
  • Sturdy heat-treated steel holds up well through multiple mowing seasons.
  • Excellent value compared to sharpening or buying generic blades.

Cons

  • May require a light touch-up sharpening out of the box for optimal cutting on some lawns.
  • Only compatible with Greenworks mowers; verify mounting pattern before purchase.
  • Limited to 21-inch cutting width; not suitable for other mower sizes.
Detailed Review

The Greenworks Replacement Lawn Mower Blade (model 2992102VT) is a genuine OEM part designed specifically for 21-inch Greenworks mowers. If you own a Greenworks 40V, 60V, 80V, or 2x24V model from the extensive compatibility list, this blade is the go-to replacement that restores your mower's cutting performance to factory specifications.

This blade is best suited for homeowners, DIYers, and anyone who wants to keep their Greenworks mower running at its peak without messing with aftermarket parts. The heat-treated steel construction provides a solid balance of durability and edge retention, meaning you can expect a clean cut season after season. Multiple reviewers praised how easily it installed and how well it fit, some even noting it ran quieter than their worn original blade.

In real-world use, this blade cuts grass cleanly and evenly. Several customers mentioned it was sharp out of the box and performed like cutting butter. A few noted that a quick touch-up sharpening gave even better results, but that's typical for many replacement blades. The weight is light at 1.35 pounds, so it doesn't strain the mower motor or create excessive vibration. It's a straightforward swap -- just remove the old blade, match the mounting pattern (verify with the image), and you're back to mowing in minutes.

One limitation is that it's not a universal blade. You must ensure your mower uses the specific mounting pattern shown. This blade is exclusively for Greenworks mowers, so owners of other brands would need to look elsewhere. Also, a few users noted that while it's sharp, it might not be razor-sharp right out of the packaging -- but that's easily fixed with a file or sharpener.

Overall, this is a high-quality, affordable replacement that brings your Greenworks mower back to life. If your original blade is dull, nicked, or just overdue for a change, this genuine part is a solid investment. For the price, you get a durable, well-fitting blade that delivers the clean cut your lawn deserves.

Specifications

Brand: Greenworks

Model: 2992102VT

Material: Stainless Steel (Heat Treated)

Color: Green

Cutting Width: 21 Inches

Product Dimensions: 20.08 x 1.97 x 0.67 inches

Weight: 1.35 pounds

Compatible Voltage: 40V, 60V, 80V, 2x24V

Assembly Required: Yes

UPC: 195526041566

4
Top Rated

Greenworks 16-inch Replacement Lawn Mower Blade

Greenworks
9.8 /10
POW Score
POW Score is calculated based on product ratings, reviews, and sales performance to help you make informed purchasing decisions. Learn more ›
This Greenworks 16-inch replacement blade is a direct fit for their corded and cordless mowers, built from one-piece alloy steel for long-lasting sharpness. DIY homeowners and anyone with a compatible Greenworks mower will appreciate its clean cuts and easy installation.
Pros & Cons

Pros

  • Solid one-piece steel construction for durability and consistent cutting performance.
  • Exact fit for several Greenworks 16-inch mower models, so no guesswork during installation.
  • Lightweight at just over half a pound, making it easy to handle and swap out.
  • Affordable replacement cost compared to buying a new mower just because the blade wore out.

Cons

  • Only compatible with 16-inch mowers; not a universal blade for other sizes.
  • Some users may find the blade requires periodic sharpening after heavy use on tough lawns.
  • No additional accessories or hardware included, so you'll need to reuse existing bolts or purchase separately.
Detailed Review

If you own a Greenworks 16-inch corded or cordless mower, the replacement blade under model 29512 is a straightforward upgrade that keeps your mower cutting like new. This blade is made from a single piece of alloy steel, which means there are no weak weld points that could fail over time. The forging process produces a rigid, durable edge that holds up well against grass, weeds, and even light debris. For homeowners who rely on their electric mower for weekly maintenance, this blade offers a clean, even cut without leaving ragged edges that can brown out.

The installation process is simple. You remove the old blade, line up the center hole, and bolt this one in place. The 15.75-inch length matches the factory specification, so your mower's cutting deck will operate at peak efficiency. Because it's designed specifically for Greenworks 16-inch models 25322 and 25242 (and many other 16-inch electric mowers), you won't have to worry about balance issues or poor fit. Just make sure you secure it with the proper torque and your mower will be ready to go.

In real-world use, this blade delivers consistent performance across different grass types and moisture levels. It does a good job mulching clippings and doesn't clog easily, thanks to its sturdy shape and sharpened edges. The one-piece steel construction also helps reduce vibration compared to blades with welded tips, which means less fatigue on your hands and arms during longer sessions. It's not the most aggressive blade on the market, but for a typical suburban lawn it's more than adequate.

Build quality is solid. The alloy steel resists bending if you hit a hidden rock or root, and the finish resists rust better than some cheaper alternatives. That said, like any mower blade, it will eventually need sharpening. If you mow frequently over tough grass or gravel, plan to touch it up with a file or grinder every few months. The lightweight design (just under 0.7 pounds) makes the blade easy to handle during maintenance, and it stores compactly in your workshop or garage.

One limitation is that it's not a universal blade. It only fits 16-inch mowers with the specific center hole pattern. Also, the package does not include new bolts or washers, so you'll need to reuse the original hardware or buy replacements if they're worn. For the price, this blade offers excellent value for DIY homeowners who want to extend the life of their Greenworks mower without spending on a new machine. It's a practical, reliable choice that gets the job done neatly.

Specifications

Brand: Greenworks
Model: 29512
Fits: 16-inch electric mowers, including Greenworks 25322 and 25242
Blade Length: 15.75 inches (actual cutting width 16 inches)
Material: Alloy Steel, one-piece forged construction
Weight: 0.69 pounds
Dimensions: 15.75 x 1.97 x 0.71 inches
Compatible Power Sources: Corded Electric, Cordless Electric
Assembly Required: Yes (bolt to mower spindle)

Best Use Cases

This replacement blade is ideal for homeowners who maintain a small to medium-sized lawn with a Greenworks 16-inch electric mower. It's perfect for routine weekly mowing of Bermuda, fescue, or rye grass. Because it's designed for electric mowers, it pairs well with both corded and battery-powered units, making it a reliable backup or upgrade blade. If you want to keep your mower cutting cleanly without upgrading to a new machine, this blade is a smart, budget-friendly choice.

5

21V Cordless String Trimmer and Brush Cutter Kit

HSHADETTARP
9.5 /10
POW Score
POW Score is calculated based on product ratings, reviews, and sales performance to help you make informed purchasing decisions. Learn more ›
This 21V cordless multi-cutter delivers versatile yard clearing thanks to swappable steel, plastic, and circular saw blades powered by two included batteries. It is a lightweight, low-maintenance yard tool ideal for homeowners and DIYers managing basic fence lines, overgrown ditches, and tight garden borders.
Pros & Cons

Pros

  • Includes two 21V batteries to reduce charging downtime
  • Multi-blade cutting head tackles everything from grass to small saplings
  • Lightweight frame and D-handle reduce shoulder and back strain
  • Adjustable shaft length makes storage and transport easy

Cons

  • Proprietary battery mount does not share platforms with major power tool brands
  • Circular saw blades struggle with wood stems thicker than one inch
  • Plastic trimmer blades wear out fast against concrete edges and stone pavers
Detailed Review

The HSHADETTARP 21V cordless trimmer operates as a hybrid between a standard grass trimmer and a compact brush cutter. Rather than relying on standard nylon trimmer line that snaps frequently on stiff stalks, this unit uses dedicated cutting blades. It comes built for homeowners and acreage caretakers who need a flexible maintenance tool that does not require the mess, exhaust, or maintenance routine of a two-stroke gas engine.

Performance depends on pairing the right blade with the task at hand. The snap-on plastic blades work fine on soft turf and everyday perimeter grass. Swapping over to the flat stainless steel blades gives you the bite needed to clear dense nettles, tall field weeds, and thick patches of crabgrass without bogging down. For overgrown property lines, the alloy circular saw blade handles tough brambles and small woody shoots with steady feeding pressure. Runtime from each 21V battery is adequate for typical suburban yard cleanup, and having two packs in the kit means you can keep one on the charger while using the other.

Ergonomics are centered around utility and light weight. At approximately 6.6 pounds, the tool is easy to maneuver along ditch banks or carry across a back lot. The aluminum shaft telescopes between 35.4 inches and 47.2 inches, so you can dial in comfortable body posture whether you are tall or short. The secondary D-handle provides solid grip stability, while the pivoting motor head lets you slice cleanly under low deck railings and around raised beds without awkward bending.

Keep your expectations realistic regarding motor power and heavy-duty durability. This is not a commercial gas brush saw intended for clearing dense forestry. Pushing the circular blade through dry hardwood stems over an inch thick will quickly stall the motor, and the plastic blades degrade rapidly if they make contact with brick walls, rock edging, or chain link fencing. Additionally, the batteries use an off-brand connection, meaning you cannot swap in your existing workshop packs.

For everyday yard trimming, touch-ups around garden borders, and reclaiming overgrown corner plots, this 21V trimmer package offers substantial versatility. If you want a complete cutting kit ready to tackle overgrown weeds without the hassle of pull cords or string spools, it delivers plenty of practical value.

Included Accessories

This kit comes packed with practical accessories to handle varied vegetation straight out of the carton:

Three alloy circular saw blades for cutting woody stems, brambles, and thin saplings.

Dual-edged stainless steel blades designed for slicing through fibrous stalks, dense weeds, and tall wild grass.

Multiple plastic cutting blades intended for general lawn edging and soft grass trimming.

Two 21V lithium-ion battery packs along with a dedicated wall charger.

Assembly hardware including a hex wrench for blade installation, plus a pair of protective utility gloves.

Best Use Cases

This multi-functional cordless cutter is best suited for specific residential and small property tasks:

Fence line and foundation trimming where standard nylon line snaps too easily on wire or wood posts.

Clearing out seasonal growth along ditches, steep embankments, and drainage swales where dragging a cord or heavy gas trimmer is impractical.

Pruning thin brambles, wild berry bushes, and overgrown scrub brush around outbuildings and shed perimeters.

Quick touch-up mowing in tight yard corners where traditional push mowers cannot fit.

Common Questions About Mower Blades

How do I determine the correct center hole size?

You must measure your existing blade’s center hole pattern to ensure a perfect fit. Common types include the 5-point star, 6-point star, and bow-tie shapes. Matching this geometry is critical for spindle mount stability and preventing dangerous vibration during operation.

Are mulching blades suitable for bagging grass clippings?

Generally, no, as the curved sail design of a mulching blade creates suction that hinders airflow. This profile is best for pulverizing clippings into the soil rather than ejecting them into a bag. For efficient bagging, you should use a standard high-lift blade that maximizes airflow suction and discharge velocity.

Can I use a blade from a different brand?

Yes, provided the dimensions, bolt pattern, and blade length match your original part number exactly. OEM interchangeability is common, but you must verify the outer hole spacing and center diameter. Using a mismatched blade can cause severe deck vibration and damage the spindle bearings over time.

How often should I replace my mower blade?

Replace your blade every two to three seasons or when the edge becomes dull despite sharpening. Frequent use on sandy soil or debris can accelerate wear on the hardened steel edge. Regular inspection helps prevent the blade from becoming unbalanced, which is a leading cause of premature engine and deck component failure.

What is the best way to remove a stuck blade?

Apply penetrating oil to the spindle bolt and let it sit for several hours before attempting removal. If the bolt is reverse-threaded, turn it clockwise to loosen it, which often surprises first-time users. Check the loosening guide for specific torque settings and safety steps to avoid stripping the bolt.