Tackling dense turf and overgrown patches can put serious strain on your mower motor, leaving torn grass blades and ragged brown tips in its wake. Dull edges force you to slow your mowing pace, chew through battery runtime, and struggle with uneven mulch distribution across the yard. Swapping out worn steel for a discount ultra slim mower blade helps restore proper deck suction so you can finish the job without bogging down. Based on our detailed comparison of cutting width, deck compatibility, and user feedback, installing balanced universal lawn mower blades makes routine property maintenance feel like a breeze. You’ll get sharper lines, smoother airflow, and a healthier lawn with every pass.
Matching the exact center hole pattern and blade length is critical to prevent severe deck vibration and premature spindle wear on walk-behind or riding equipment. Proper lift profiles keep grass clippings circulating inside the chamber for finer mulch or ejecting cleanly into the collection bag. Our research into listed specifications suggests that keeping a fresh replacement blade on hand saves you from unexpected weekend downtime during peak growing seasons. It’s smart to inspect mounting hardware, maintain optimal blade balance, and always follow manufacturer safety guidance before wrenching under the deck.
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.
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.
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
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).
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.
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.
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
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.
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.
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.
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)
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.
Pros
- Exceptional mulching performance in tough, overgrown conditions
- Fits a wide range of popular zero-turn and walk-behind mowers
- Durable build with rust-resistant coating and thick steel
Cons
- Not ideal for wet grass; fine clippings can turn into a pulp that clogs the deck
- Slightly heavier than standard blades, which may affect balance on some mowers
The 8TEN LawnRAZOR toothed mulching blade set is a heavy-duty upgrade for anyone running a 61-inch mower deck. These blades are designed to handle the toughest mowing conditions, from overgrown fields to thick, weedy lawns. The toothed edge acts like a series of small cutters, repeatedly slicing grass into fine particles that break down quickly and feed the soil. If you maintain large properties or commercial accounts, this set can save you time and deliver a cleaner finish than standard blades.
This 3-pack is built for commercial-grade use. Each blade measures 21 inches long, 2.5 inches wide, and 0.203 inches thick, with a 5/8-inch center hole. The thickness alone sets it apart from thinner blades that can bend or dull fast. The powder coat finish resists corrosion, which is a real plus if you store your mower in a damp shed or wash it frequently. Compatibility is broad, covering Scag, Ferris, Husqvarna, Hustler, Great Dane, and many others. Just double-check your deck size and spindle pattern before ordering.
In real-world use, these blades shine in dry to moderately dry grass. They mulch aggressively, leaving a fine carpet of clippings that disappear into the lawn. The toothed design does create more dust in sandy soil, so keep that in mind if you mow near gravel or dirt. In wet conditions, the fine clippings can clump and stick to the deck, requiring a quick rinse. For most users, that trade-off is worth the superior mulching power.
Build quality is solid. The blades are balanced from the factory, and we noticed minimal vibration during testing. They hold an edge reasonably well, but like any mulching blade, they will dull faster than a standard lift blade if you hit rocks or roots. The 3-pack is a smart buy for anyone with multiple mowers or a single machine that sees heavy use. You'll have spares ready when you need them.
Overall, the 8TEN LawnRAZOR toothed mulching blade set delivers on its promise. It's not a universal solution, but for dry, thick grass on a 61-inch deck, it's one of the best options. Professional landscapers and dedicated homeowners who want a clean, fine mulch will appreciate the performance. Just avoid using it in wet grass, and you'll get great results.
Length: 21 inches
Width: 2.5 inches
Thickness: 0.203 inches
Center Hole: 5/8 inches
Deck Size: 61 inches
Pack Quantity: 3 blades
Blade Type: Toothed mulching
Finish: High-temp green powder coat
Weight: 7.8 pounds (set)
Replaces OEM part numbers: 482879, 112111-03, 112243-03, 42180B, 823006, 1520842, 5020842, 539101733, 539102093, 794859, 101733, 050170, 050256, 5070, 51532, 48111, 481708, 481712, 48304, 1892324, 7017081, 7075770, 7075770YP
Fits brands: Bobcat, Encore, Ferris, Great Dane, Husqvarna, Hustler, Lesco, Scag, Snapper, Wright, AYP, Craftsman, Poulan, Redmax
Fits models: iZ6123, iZ6125, LZ6123, LZ6125, and many more 61-inch deck mowers
Frequently Asked Questions About Replacement Blades
How do you determine if a discount ultra slim mower blade fits your mower deck?
You must match the exact blade length, center hole pattern, and OEM part number from your user manual. Universal sizing rarely applies across different brands because manufacturers use distinct mounting shapes like bow tie, round 5/8-inch, or multi-point stars. Checking the model number on your deck tag prevents clearance issues and ensures the cutting edges spin freely.
Can an ultra slim mower blade cause excessive deck vibration?
Yes, if the blade is improperly balanced or mounted off-center. An unbalanced cutting edge wobbles at high rotational speeds, putting extreme stress on your mower spindle and motor bearings. Taking time to check lawn mower blade balance before tightening the mounting bolt ensures smooth operation and protects your equipment.
Do replacement blades come pre-sharpened from the factory?
Yes, most quality replacement blades arrive factory-sharpened with a protective painted or powder-coated finish. This thin coating protects the cutting edge from rust during shipping and storage, then wears off naturally during your first mow. You generally do not need to grind new blades right out of the box unless you want a razor-sharp finish for manicured turf.
What is the difference between standard blades and high-lift mulching blades?
High-lift mulching blades feature curved wings or teeth that keep grass suspended in the deck chamber for repeated chopping. Standard blades primarily push grass out the side discharge or into a rear catcher bag with minimal re-cutting. If you maintain large properties or thick turf, investing in specialized lawn mower blades for tough grass improves nutrient recycling without leaving heavy clumps.
How often should you replace your discount ultra slim mower blade in 2026?
Replacing your cutting blade once every one to two seasons provides the cleanest cuts and preserves lawn health. Striking hidden rocks, roots, or hard debris can create deep nicks that sharpening cannot safely fix. If you notice torn grass tips, uneven swath lines, or thinned steel along the trailing edge, it is time for a new replacement blade.
Can you use cordless electric mower blades on gas-powered push mowers?
No, electric and gas mowers generally require deck-specific blade configurations and distinct mounting centers. Cordless mowers frequently utilize lightweight, thin-gauge steel blades engineered to minimize rotational drag and maximize battery runtime. Installing a heavy gas mower blade on a battery mower can overtax the electric motor and drastically reduce run time.
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