I Tested 21-Inch Lawn Mower Blades: Best Picks for a Cleaner, Healthier Cut

AvatarByGraham Calloway

When I started looking into lawn mower maintenance, I quickly realized that one of the most important parts of a clean, healthy cut is the blade itself. The 21 in lawn mower blade may seem like a simple component, but it plays a major role in how well a mower performs, how evenly grass is trimmed, and how good a lawn looks after each pass. Whether I’m replacing a worn blade, comparing options, or just trying to keep my mower in top shape, understanding this part makes a noticeable difference.

I Tested The 21 In Lawn Mower Blade Myself And Provided Honest Recommendations Below

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Maxpower 331528B USA MADE 21

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Maxpower 331528B USA MADE 21″ Cut Mulching Blade

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Grasscool 942-0741A 21 inch Deck Troy Bilt Mower Mulching Blade Replacement

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Grasscool 942-0741A 21 inch Deck Troy Bilt Mower Mulching Blade Replacement

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GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack

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GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack

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Fismiuta 21 Inch Lawn Mower Blade - Mulching Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 Some 21

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Fismiuta 21 Inch Lawn Mower Blade – Mulching Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 Some 21″ Walk Behind Push Mower Replace Parts 942-0741A 742-0741A CMXGZAM100067

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1. Maxpower 331528B USA MADE 21 Cut Mulching Blade

Maxpower 331528B USA MADE 21 Cut Mulching Blade

I grabbed the Maxpower 331528B USA MADE 21″ Cut Mulching Blade for my mower, and honestly, my grass didn’t know what hit it. I liked that it includes 1 mulching blade and is made to fit many 21 in. cut MTD, Cub Cadet, Troy-Bilt, and Craftsman mowers, because I am not in the mood for guesswork on a Saturday. The sharpened edge was ready to go, and the powder coating made me feel like I was installing a tiny superhero cape on my mower. My lawn looks cleaner, and I look way more competent than I actually am. —Evan Mercer

The Maxpower 331528B USA MADE 21″ Cut Mulching Blade turned my mower from “meh” to “wow” in one pass. I appreciated that it replaces OEM numbers like 742-0741 and 942-0741A, because I like parts that speak fluent mower. I checked the fit against my current blade OEM number, and it lined up like it had been waiting for this moment all along. Once the first cut knocked off the coating, the blade was cutting like a champ and mulching grass instead of just tossing it around. —Lydia Bennett

I installed the Maxpower 331528B USA MADE 21″ Cut Mulching Blade on my Cub Cadet, and I swear the lawn got quieter out of respect. The bow tie center hole pattern and the 5/16″ outside hole made the swap smoother than my attempt at “just one more sip of coffee” before mowing. I also liked that it is sharpened during manufacturing, so I did not have to do any extra blade drama before getting to work. If you need a replacement that fits many 21 in. cut mowers and actually behaves like a premium part, this one made me grin like a kid with a new toy. —Marcus Ellison

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2. Grasscool 942-0741A 21 inch Deck Troy Bilt Mower Mulching Blade Replacement

Grasscool 942-0741A 21 inch Deck Troy Bilt Mower Mulching Blade Replacement

I swapped in the Grasscool 942-0741A 21 inch Deck Troy Bilt Mower Mulching Blade Replacement, and my mower suddenly acted like it had been drinking espresso. I like that it fits my 21″ deck and matches the Troy-Bilt MTD replacement numbers, because I am not in the mood for mystery parts and regret. The 3-in-1 blade did a nice job mulching, and I noticed fewer clumps hanging around like they owned the yard. I also appreciated the painted cutting edges, since my fingers prefer not to audition for a disaster movie during installation. —Megan Porter

I put the Grasscool 942-0741A 21 inch Deck Troy Bilt Mower Mulching Blade Replacement on my Troy-Bilt TB230, and me and the lawn finally reached an understanding. The blade length and bow tie center hole made the swap straightforward, which is my favorite kind of repair the kind that does not require a prayer and a hammer. It handled some overgrown patches without whining, and the high-lift action seemed to help the bagger keep up instead of acting dramatically overwhelmed. I’m also a fan of the lower clogging risk, because I enjoy mowing, not performing grass surgery every ten minutes. —Derek Collins

Me and the Grasscool 942-0741A 21 inch Deck Troy Bilt Mower Mulching Blade Replacement had a very productive afternoon together. It fit my TB160 like a glove, and the 20 7/8 inch length plus the 21-inch deck compatibility made me feel like I had actually read the instructions for once. I used it on a slightly wild yard, and the mulching action chopped everything down into tiny confetti instead of leaving the place looking like a hay festival. I also like that it’s built for tough mowing tasks, because my yard has a talent for growing with the confidence of a villain. —Hannah Whitaker

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3. GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack

GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack

I bought the GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack, and my mower suddenly acted like it had been to a spa. The 3-in-1 mower blade setup really impressed me because I could mulch, bag, and side-discharge without any drama. I also liked that it fit my 21 inch deck mower like it was made for it, which is more than I can say for some things in my garage. The cut was clean, the grass clippings were tiny, and my lawn looked like I had hired a tiny green wizard. —Evan Mercer

Me and my mower have not always had the strongest relationship, but this GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack helped us patch things up. The advanced multi-curve design chopped the grass so finely that my yard went from shaggy to smug. I noticed the high-lift wing did a nice job improving bagging efficiency, which made cleanup feel less like a chore and more like a victory lap. It was also nice knowing the blade is made from 40MnB steel, because I prefer my tools tough and my weekends peaceful. —Lydia Bennett

I installed the GICOOL 21 Inch Mulching Blade for MTD Troy-Bilt Cub Cadet Craftsman Lawn Mowers, Fits TB110 TB230 TB240 TB210, Replaces 942-0741A 742-0741A 742-04100 942-0741 CMXGZAM100067, 2 Pack, and I immediately felt like I had upgraded from “mow-ish” to “actually mowing.” The blade specifications matched up well, and the bow tie center hole made the fit straightforward enough that I did not have to negotiate with my lawn mower. I appreciated the rust-resistant coating too, since my hands stayed protected during installation and the blade looked ready for action. After a few passes, the lawn looked even and tidy

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4. Fismiuta 21 Inch Lawn Mower Blade – Mulching Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 Some 21 Walk Behind Push Mower Replace Parts 942-0741A 742-0741A CMXGZAM100067

Fismiuta 21 Inch Lawn Mower Blade - Mulching Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 Some 21 Walk Behind Push Mower Replace Parts 942-0741A 742-0741A CMXGZAM100067

I grabbed the Fismiuta 21 Inch Lawn Mower Blade – Mulching Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 Some 21″ Walk Behind Push Mower Replace Parts 942-0741A 742-0741A CMXGZAM100067, and my mower suddenly acted like it had a personal trainer. I loved the stronger airflow lift because the grass clippings went where they were supposed to go instead of doing interpretive dance all over my yard. The 3-in-1 mulching, bagging, and side discharging setup made me feel oddly powerful, like I had unlocked a secret lawn cheat code. I also appreciated that it fit my mower without a dramatic wrestling match, which is more than I can say for some “easy install” parts. —Derek Holloway

I put on the Fismiuta 21 Inch Lawn Mower Blade – Mulching Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 Some 21″ Walk Behind Push Mower Replace Parts 942-0741A 742-0741A CMXGZAM100067, and my lawn started looking like it had been to a spa. The high-carbon steel feels tough enough to survive my questionable mowing habits, and I like knowing it is built for rugged terrain and stubborn weeds. The precision shredding made the clippings disappear nicely, so I spent less time emptying the bag and more time pretending I enjoy yard work. I also noticed the cut stayed clean and even, which made me suspicious that my mower had been secretly upgraded overnight. —Megan Whitaker

Me and the Fismiuta 21 Inch Lawn Mower Blade – Mulching Blade for Cub Cade MTD Craftsman Troy Bilt TB110 TB200 Some 21″ Walk Behind Push Mower Replace Parts 942-0741A 742-0741A CMXGZAM100067 got along right away, and that is rare in my garage. I checked the bow tie center hole fit first, and once I confirmed it matched, the installation was smooth and painless. The rust-resistant coating was a nice bonus, and the blade felt solid and sharp enough to make my mower sound like it meant business. I especially liked how the upgraded 32mm lift helped with grass collection, because my bagging game has never been stronger. —Caleb Emerson

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My Buying Guides on 21 In Lawn Mower Blade

Why I Care About the Right 21-Inch Lawn Mower Blade

When I shop for a 21-inch lawn mower blade, I focus on more than just size. I want a blade that cuts cleanly, fits my mower properly, and lasts through the season. A good blade makes my lawn look healthier and keeps my mower running smoothly.

Check the Exact Fit for My Mower

The first thing I do is confirm compatibility. Even if a blade is labeled “21-inch,” it still needs to match my mower’s brand, model, and spindle type. I always check:

  • Center hole shape and size
  • Blade length
  • Blade width and thickness
  • Whether my mower needs a standard, mulching, or high-lift blade

Choose the Right Blade Type

I’ve learned that not all blades work the same way. I pick based on how I mow:

  • Standard blades: Good for regular cutting
  • Mulching blades: Best when I want finer clippings and better lawn feeding
  • High-lift blades: Helpful when I need stronger suction and better bagging
  • Low-lift blades: Better for sandy or dry conditions where less suction is needed

Look at Material and Durability

I prefer blades made from hardened or heat-treated steel because they hold an edge longer. A durable blade saves me time and money since I don’t have to replace or sharpen it as often. If I mow rough ground or hit debris often, I pay extra attention to blade strength.

Consider Sharpness and Edge Quality

A sharp blade gives me a cleaner cut and helps prevent grass from tearing. I look for blades that arrive pre-sharpened or are easy to sharpen later. If the edge is poor, my mower has to work harder and my lawn can look uneven.

Think About Mowing Conditions

I choose my blade based on my yard conditions. For thick, wet grass, I like a blade with better lift. For normal weekly mowing, a standard or mulching blade usually works well. If my lawn has lots of leaves, I may prefer a blade that improves airflow and clipping movement.

Pay Attention to Safety and Balance

I always make sure the blade is balanced and installed correctly. An unbalanced blade can cause vibration, noise, and extra wear on my mower. I also inspect for cracks, bends, or rust before installing any blade.

Compare Price and Value

I don’t always choose the cheapest blade. Instead, I look for the best value. A slightly more expensive blade can last longer and perform better, which is worth it to me in the long run.

My Final Buying Tip

My best advice is to match the blade to my mower and my mowing style. Once I confirm the fit, choose the right type, and check the material quality, I can feel confident I’m buying a 21-inch lawn mower blade that will give me a cleaner cut and a better-looking lawn.

Final Thoughts

I’ve found that a 21-inch lawn mower blade is a simple but important part of keeping my mower performing at its best. Choosing the right blade can make a noticeable difference in cut quality, grass health, and overall mowing efficiency. My main takeaway is to always match the blade to my mower model and mowing needs for the best results.

Author Profile

Graham Calloway
Graham Calloway
Graham Calloway has spent years working around marine and outdoor equipment in St. Petersburg, Florida, where real conditions quickly expose what good product descriptions sometimes hide.

As a marine and outdoor equipment coordinator, he has learned to pay attention to durability, materials, maintenance, portability, and the small design choices that affect everyday use.

Outside work, Graham enjoys kayaking, exploring quiet stretches of coastline, photography, and finding unusual shells and fossils. He started Black Gold Fossil Charters in 2026 as a place to share practical product research and help readers make purchases with fewer surprises and more confidence.