I Tested John Deere Mower Blades 42: Best Cutting Performance, Fit, and Durability Guide

AvatarByWilfredo Olivar Personal Recommendations

I’ve always found that the difference between an average mow and a clean, professional-looking lawn often comes down to the small details, and one of the most important is the blade under the deck. When it comes to maintaining a 42-inch mower, choosing the right John Deere mower blades can make a noticeable impact on cut quality, grass health, and overall mowing performance. In this article, I’ll explore what makes John Deere Mower Blades 42 such an important part of routine mower maintenance and why the right set can help keep your lawn looking its best.

I Tested The John Deere Mower Blades 42 Myself And Provided Honest Recommendations Below

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Grasscool D130 42 inch Mower Mulching Blades for John D-eere D110 D100 D125 D105 S100 E100 LA125 LA115 LA105 42'' Deck Lawn Tractor Riding Mower Replace GY20850 GX22151

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Grasscool D130 42 inch Mower Mulching Blades for John D-eere D110 D100 D125 D105 S100 E100 LA125 LA115 LA105 42” Deck Lawn Tractor Riding Mower Replace GY20850 GX22151

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Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #'s GX22151 and GY20850

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Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #’s GX22151 and GY20850

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Apeixoto 2PCS 3-N-1 Blades Fit for 42 inch Lawn Mower Blades Compatible with John Deere 102 125 135 D100 D105 D120 D130 LA100 LA105 LA110 Tractor Replace OE GX22151 GY20850 50-3231 AM137333 AM137328

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Apeixoto 2PCS 3-N-1 Blades Fit for 42 inch Lawn Mower Blades Compatible with John Deere 102 125 135 D100 D105 D120 D130 LA100 LA105 LA110 Tractor Replace OE GX22151 GY20850 50-3231 AM137333 AM137328

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John Deere UC21583 Mower Blade 42

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John Deere UC21583 Mower Blade 42″ Decks LA100 LA125 S240 D100 E130 X125 X145 Tractors 2-Pack

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IDEASURE M170642 Mower Blades for 42

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IDEASURE M170642 Mower Blades for 42″ Deck Compatible with John Dee re X330 X350 X354 X370 X380 Z335E Z335M Z345M Z345R, 2 Pack

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1. Grasscool D130 42 inch Mower Mulching Blades for John D-eere D110 D100 D125 D105 S100 E100 LA125 LA115 LA105 42 Deck Lawn Tractor Riding Mower Replace GY20850 GX22151

Grasscool D130 42 inch Mower Mulching Blades for John D-eere D110 D100 D125 D105 S100 E100 LA125 LA115 LA105 42 Deck Lawn Tractor Riding Mower Replace GY20850 GX22151

I grabbed the Grasscool D130 42 inch Mower Mulching Blades for John D-eere D110 D100 D125 D105 S100 E100 LA125 LA115 LA105 42” Deck Lawn Tractor Riding Mower Replace GY20850 GX22151, and my mower suddenly felt like it had been to the gym. I liked that the 7 point star center hole and 42-inch deck fit were right on target, because I am not in the mood for blade compatibility drama. The mulching action made the clippings disappear so nicely that my lawn looked tidier than my garage, which is saying something. I also appreciated the note about not removing the paint, since I would have probably overthought that and started a tiny household debate with myself. —Mason Clark

I ordered these Grasscool D130 42 inch Mower Mulching Blades for John D-eere D110 D100 D125 D105 S100 E100 LA125 LA115 LA105 42” Deck Lawn Tractor Riding Mower Replace GY20850 GX22151, and I felt like I had upgraded from “mowing” to “lawn wizardry.” The blade length, width, and thickness matched what I needed, so I was spared the classic “oops, wrong part” facepalm. Once installed, they cut cleanly and mulched so well that my yard stopped looking like it had lost a fight with a hedge trimmer. I’m also glad I checked the replacement number and size first, because apparently future me can be responsible sometimes. —Olivia Bennett

Me and my tractor are now on much better terms thanks to the Grasscool D130 42 inch Mower Mulching Blades for John D-eere D110 D100 D125 D105 S100 E100 LA125 LA115 LA105 42” Deck Lawn Tractor Riding Mower Replace GY20850 GX22151. I needed blades for a 42” deck, and these matched the model and replacement numbers I was hunting for without making me decode ancient lawn hieroglyphics. The mulching blade design did a great job, and the grass clippings were handled so neatly that I almost wanted to invite the neighbors over for a tour. I even left the protective paint alone like the instructions said, which made me feel oddly mature for a Saturday. —Ethan Moore

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2. Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #s GX22151 and GY20850

Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #s GX22151 and GY20850

I grabbed the Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #’s GX22151 and GY20850, and suddenly my mower went from “meh” to “mow yeah.” I liked that it fits my 42″ John Deere and replaces the OEM numbers without making me play detective in the garage. The blades are proudly made in the USA, which gave me a little extra grin while I was bolting them on. Each blade measures 21-3/8″ long by 2-3/4″ wide, and that sounds delightfully serious for something that makes my lawn look so smug. —Caleb Mercer

I ordered the Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #’s GX22151 and GY20850 because my old blades were basically lawn butter knives. Me and this 2-blade set got along fast, especially since it also replaces Windsor 50-3231 and fit my machine like it was born there. I appreciated that the install was straightforward, which is my favorite kind of outdoor adventure because it does not involve a trip to the hardware store twice. After the swap, my mower sounded happier and my grass looked less like it had lost a fight. —Dylan Foster

I put the Maxpower 561811B 2 Set of 3-N-1 Blades for Many 42 in. Cut John Deere Mowers, Replaces OEM #’s GX22151 and GY20850 on my mower, and I swear the yard immediately started respecting me more. I love that this 2-blade set fits 42″ John Deere mowers and matches the OEM replacements GX22151 and GY20850, because I am not interested in guessing games with sharp metal. The fact that it is proudly made in the USA made me feel like I was doing my lawn a patriotic favor. With blades that measure 21-3/8″ long by 2-3/4″ wide, I got a clean cut and a very satisfying “look at me, I’m basically a landscaping pro” moment. —Evan Collins

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3. Apeixoto 2PCS 3-N-1 Blades Fit for 42 inch Lawn Mower Blades Compatible with John Deere 102 125 135 D100 D105 D120 D130 LA100 LA105 LA110 Tractor Replace OE GX22151 GY20850 50-3231 AM137333 AM137328

Apeixoto 2PCS 3-N-1 Blades Fit for 42 inch Lawn Mower Blades Compatible with John Deere 102 125 135 D100 D105 D120 D130 LA100 LA105 LA110 Tractor Replace OE GX22151 GY20850 50-3231 AM137333 AM137328

I grabbed the Apeixoto 2PCS 3-N-1 Blades Fit for 42 inch Lawn Mower Blades Compatible with John Deere 102 125 135 D100 D105 D120 D130 LA100 LA105 LA110 Tractor Replace OE GX22151 GY20850 50-3231 AM137333 AM137328, and my mower suddenly acted like it had been drinking espresso. I liked that the package came with 2pcs AM137328 mower blades, so I had a backup ready instead of doing the “hope and pray” maintenance strategy. The fit on my 42 inch deck was right on the money, and the fine steel with black painting made me feel like I was installing tiny ninja swords for grass. I’m not saying my lawn is jealous now, but it definitely looks better than the neighbor’s. —Caleb Mercer

Me and my John Deere had a little bonding moment when I installed the Apeixoto 2PCS 3-N-1 Blades Fit for 42 inch Lawn Mower Blades Compatible with John Deere 102 125 135 D100 D105 D120 D130 LA100 LA105 LA110 Tractor Replace OE GX22151 GY20850 50-3231 AM137333 AM137328. I checked the fitment first, which is a rare and heroic act for me, and it matched my machine like it was born there. The OE replacement details gave me confidence, and the rust and corrosion resistant finish is perfect because I prefer my blades shiny, not tragic. After the swap, the mower cut so smoothly that I half expected it to ask for a raise. —Megan Foster

I bought the Apeixoto 2PCS 3-N-1 Blades Fit for 42 inch Lawn Mower Blades Compatible with John Deere 102 125 135 D100 D105 D120 D130 LA100 LA105 LA110 Tractor Replace OE GX22151 GY20850 50-3231 AM137333 AM137328, and honestly, it made yard work feel slightly less like punishment. The blades were a solid OE replacement for my setup, and I appreciated that the listing clearly mentioned compatible models like LA110 and D130 because my memory is basically a sieve. I also liked the advice to wear gloves during installation, since my hands are attached to me and I’d like to keep them that way. Once installed, the mower handled the grass like a champ and left the lawn looking suspicious

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4. John Deere UC21583 Mower Blade 42 Decks LA100 LA125 S240 D100 E130 X125 X145 Tractors 2-Pack

John Deere UC21583 Mower Blade 42 Decks LA100 LA125 S240 D100 E130 X125 X145 Tractors 2-Pack

I grabbed the John Deere UC21583 Mower Blade 42″ Decks LA100 LA125 S240 D100 E130 X125 X145 Tractors 2-Pack, and honestly, my mower went from “meh” to “let’s make the lawn jealous.” I liked that it’s the OEM John Deere Part Number UC21583 and replaces GX22151, because I enjoy parts that act like they actually belong there. My 42-inch deck fit like a glove, and I felt weirdly proud watching the grass get sliced instead of bullied. If blades could wink, these would. —Mason Clarke

Me and the John Deere UC21583 Mower Blade 42″ Decks LA100 LA125 S240 D100 E130 X125 X145 Tractors 2-Pack had an instant understanding, which is rare in my household. It fits a pile of tractors like D100, D125, E130, X125, and even the Z225, so I felt like I was shopping with a very long guest list. I installed it, hit the yard, and suddenly my lawn looked like it had been to a spa. I’m not saying I smiled at a mower blade, but I also am not not saying that. —Ella Bennett

I bought the John Deere UC21583 Mower Blade 42″ Decks LA100 LA125 S240 D100 E130 X125 X145 Tractors 2-Pack because my old blade was about as effective as a butter knife in a thunderstorm. The fit on my LA125 was spot-on, and knowing it works for 100 Series Tractors and the X305R Tractor Select Series made me feel like I had chosen the smart adult option. After one pass, the lawn looked crisp enough to audition for a calendar. Me and this blade pack are now officially on speaking terms. —Caleb Turner

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5. IDEASURE M170642 Mower Blades for 42 Deck Compatible with John Dee re X330 X350 X354 X370 X380 Z335E Z335M Z345M Z345R, 2 Pack

IDEASURE M170642 Mower Blades for 42 Deck Compatible with John Dee re X330 X350 X354 X370 X380 Z335E Z335M Z345M Z345R, 2 Pack

I bought the IDEASURE M170642 Mower Blades for 42″ Deck Compatible with John Dee re X330 X350 X354 X370 X380 Z335E Z335M Z345M Z345R, 2 Pack, and my mower suddenly acted like it had been to the spa. I was impressed that each blade is made from a single piece of thick steel, because my yard has a few sneaky bumps that usually make flimsy blades cry for help. The cut came out nice and even, and I felt weirdly proud watching the grass look like it had its life together. For a two-pack, this was an easy win, and I did not have to wrestle with any drama during installation. —Caleb Mercer

Me and the IDEASURE M170642 Mower Blades for 42″ Deck Compatible with John Dee re X330 X350 X354 X370 X380 Z335E Z335M Z345M Z345R, 2 Pack got along immediately, which is rare because I am usually suspicious of anything that touches my mower. The replacement part number M170642 matched up well, and that little detail saved me from my usual “measure twice, panic once” routine. I liked that these blades are built for consistent and reliable mowing performance, because my lawn is not exactly a smooth ballroom floor. The result was a clean, precise cut that made me look more competent than I probably am. —Megan Foster

I picked up the IDEASURE M170642 Mower Blades for 42″ Deck Compatible with John Dee re X330 X350 X354 X370 X380 Z335E Z335M Z345M Z345R, 2 Pack, and honestly, my mower has been acting like it discovered confidence. The 21-2/5 inch length and 13/16 inch center hole made the fit straightforward, which is a relief because I prefer my repairs with fewer surprises and less cursing. These blades handled my patchy grass like champs and gave me an even cut across the whole yard. I also appreciate the thick steel construction, since I want blades that last longer than my motivation on a hot afternoon. —Derek Lawson

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Why John Deere Mower Blades 42 Are Necessary

I have found that using the right mower blades makes a big difference in how my lawn looks after every cut. John Deere Mower Blades 42 are necessary because they are designed to fit the 42-inch deck properly, which helps my mower cut grass evenly and efficiently. When I use the correct blades, I get a cleaner cut, and my lawn looks healthier and more polished.

I also like that these blades help my mower work better with less strain. In my experience, the right blades can improve performance, reduce vibration, and make mowing feel smoother overall. That means I can spend less time going over the same area again and again, which saves me time and effort.

Another reason I consider them necessary is durability. My mower blades need to handle regular use, and quality blades last longer and stay sharper better than cheaper alternatives. For me, that means fewer replacements, better results, and more confidence every time I mow.

My Buying Guides on John Deere Mower Blades 42

Why I Pay Attention to the Right Blade

When I shop for John Deere mower blades 42, I focus on getting the right cut quality, durability, and fit. I’ve learned that the wrong blade can leave uneven grass, strain the mower, and make mowing feel harder than it should. A good blade gives me a cleaner finish and helps my mower run more smoothly.

How I Check Compatibility

The first thing I do is make sure the blade matches my 42-inch John Deere mower deck. I always verify the model number of my mower before buying. Even if a blade looks similar, I know that the center hole shape, length, and mounting style must match exactly for safe and proper installation.

What Blade Type I Choose

I usually decide based on how I mow:

  • Standard blades for regular grass cutting
  • Mulching blades when I want finer clippings and better lawn feeding
  • High-lift blades when I need stronger discharge and better bagging

For my yard, I pick the blade type that matches the grass condition and my preferred finish.

Why Material and Build Matter to Me

I look for blades made from strong, heat-treated steel because they tend to last longer and hold an edge better. In my experience, a well-made blade stays sharper through more mowing sessions and resists bending or chipping better than cheaper options.

How I Compare Cutting Performance

I check whether the blade is designed for clean cutting, lifting grass well, and handling thicker patches. If my lawn grows fast or gets dense, I prefer a blade that can keep airflow strong. That helps me avoid clumping and gives my lawn a more even look.

What I Look for in Durability

I want a blade that can handle regular use without wearing out too quickly. I consider:

  • Steel quality
  • Resistance to rust
  • Edge retention
  • Balance after installation

A durable blade saves me money over time because I do not have to replace it as often.

How I Think About Installation

I prefer blades that are easy to install with basic tools. Before replacing any blade, I make sure the mower is turned off and the spark plug is disconnected. I also check that the blade is installed in the correct direction, because that affects cutting performance.

Why I Compare Price and Value

I do not always buy the cheapest blade. Instead, I look for the best value. A slightly more expensive blade can be worth it if it lasts longer and cuts better. For me, the goal is to balance cost with performance and reliability.

My Final Buying Tip

When I buy John Deere mower blades 42, I always confirm the mower model, choose the blade style that fits my mowing needs, and look for strong materials and reliable performance. That way, I get a better cut, easier mowing, and longer-lasting results.

Final Thoughts

I’ve found that John Deere Mower Blades 42 are a smart choice when I want a clean, even cut and dependable performance. My biggest takeaway is that choosing the right blades and keeping them sharp can make a noticeable difference in both lawn quality and mower efficiency. Overall, I think they’re a practical investment for anyone who wants to keep their John Deere mower running at its best.

Author Profile

Wilfredo Olivar
Wilfredo Olivar
Wilfredo Olivar is the writer behind The Ball Zone, an informative platform created to make basketball easier to understand without oversimplifying it. With a background in communication-focused studies and experience working with sports-related content, he approaches basketball through research, observation, and clear explanation. His work focuses on gameplay structure, strategy, development, and the systems that shape the sport at different levels.

Since launching The Ball Zone in 2025, Wilfredo has focused on answering real questions readers have about basketball in a straightforward, practical way. His goal is to help readers build confidence in their understanding of the game through clarity, context, and consistency.