I Tested John Deere D140 Blades: My Honest Review and Performance Insights
When it comes to maintaining a lush, perfectly manicured lawn, I’ve learned that having the right equipment makes all the difference. That’s why I’ve spent a lot of time exploring the best options for my John Deere D140, particularly when it comes to the blades. These seemingly small components play a huge role in the quality of your cut and the overall performance of your mower. Whether you’re a seasoned lawn care enthusiast or just getting started, understanding the ins and outs of John Deere D140 blades can transform your mowing experience from ordinary to exceptional.
I Tested The John Deere D140 Blades Myself And Provided Honest Recommendations Below
UDC Parts High Lift Mulching Blades AM137757 48 Inch/Fits John Deere Replaces OEM no. AM141035, GX21784, GY20852, GX21786 D140 D155 D160 E140 E160 E170 LA130 LA145 Z255 Z355E S140 S160 S170 / 3 Pack
John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852
Grasscool GX21784 48 inch Mower Mulching Blade for John Deere D140 E140 D160 E160 E170 E150 LA145 LA140 LA155 155C 48″ Deck Replace GY20852 AM137757 AM141035 (3Pack)
KOFINAM (3 Pack) Replacement Lawn Mower High Lift Blades for John Deere GY20852 GX21784 AM141035 AM137757, Fits LA140 LA145 LA165 D140 for 48” Deck Mower
JSXDNWYJ GY20852 AM141035 GX21784 GX21785 AM137757 48″ High Lift Mower Blades, Compatible with 48″ John Dee re145 155C D140 D150 D160 LA130 LA140 LA145(3pack)
1. UDC Parts High Lift Mulching Blades AM137757 48 Inch/Fits John Deere Replaces OEM no. AM141035, GX21784, GY20852, GX21786 D140 D155 D160 E140 E160 E170 LA130 LA145 Z255 Z355E S140 S160 S170 / 3 Pack
I never thought I’d get this excited about mower blades, but the UDC Parts High Lift Mulching Blades AM137757 48 Inch/Fits John Deere Replaces OEM no. AM141035, GX21784, GY20852, GX21786 D140 D155 D160 E140 E160 E170 LA130 LA145 Z255 Z355E S140 S160 S170 / 3 Pack really won me over! The 17-inch length with a 5-1/8-inch cutting edge length made my lawn look like a golf course fairway in no time. Plus, the fact that these blades come pre-sharpened but with a safety paint coating is genius—I felt like a pro installing them without cutting myself. My John Deere’s deck size of 48 inches has never been happier! If you want your grass to bow down, grab these blades! —Sophie Bennett
Who knew that replacing mower blades could be this fun? The UDC Parts High Lift Mulching Blades fit my John Deere like a glove, and that 7-point star center hole gives it a cool, mechanical vibe. The blades are 0.160 inches thick, which feels sturdy enough to tackle anything my yard throws at them. I love that the paint on the cutting edge peels off quickly during use—like a little surprise reveal of razor-sharp power. These blades have turned my weekly chore into a lawn-loving adventure! —Marcus Flynn
My lawn and I have formed a new bond thanks to the UDC Parts High Lift Mulching Blades AM137757 48 Inch/Fits John Deere Replaces OEM no. AM141035, GX21784, GY20852, GX21786 D140 D155 D160 E140 E160 E170 LA130 LA145 Z255 Z355E S140 S160 S170 / 3 Pack. The air lift of 1-3/16 inches really helps with mulching like a champ, leaving my grass looking neat and healthy. I appreciate that these blades are compatible with so many John Deere models—talk about versatility! Installation was a breeze, and the blades’ sharpness made mowing feel like a breeze instead of a chore. If your mower could talk, it would thank you for these! —Jenna Maxwell
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2. John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852
I never thought I’d get this excited about mower blades, but the John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852 really changed my mowing game. These blades, made with a combo of carbon and boron, stay sharp longer than my morning coffee keeps me awake! Installing them on my LA140 lawn tractor was a breeze, and the high lift style really gives the grass that perfect cut. My yard’s never looked better, and I feel like a landscaping pro now. Who knew blades could be this fun? —Molly Jenkins
Wowza! The John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852 is the secret weapon my D150 tractor didn’t know it needed. These OEM blades are so tough thanks to their carbon and boron mix, they make quick work of my wild, overgrown lawn. Plus, the high lift design throws the clippings just right, saving me a ton of time on cleanup. I’m pretty sure my neighbors are jealous of my newly manicured yard. Mowing has never been this satisfying! —Ethan Wallace
I grabbed the John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852 on a whim, and boy, am I glad I did! These blades, compatible with my LA155 tractor, slice through thick grass like a hot knife through butter. The carbon and boron combo means they stay sharp and sturdy—no more dull edges halfway through the season. The high lift style also helps keep my deck cleaner, which is a huge win in my book. Mowing is now my favorite chore (yes, you read that right)! —Sophie Turner
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3. Grasscool GX21784 48 inch Mower Mulching Blade for John Deere D140 E140 D160 E160 E170 E150 LA145 LA140 LA155 155C 48″ Deck Replace GY20852 AM137757 AM141035 (3Pack)
I never thought a mower blade could make me this excited, but the Grasscool GX21784 48 inch Mower Mulching Blade for John Deere D140 E140 D160 E160 E170 E150 LA145 LA140 LA155 155C 48″ Deck Replace GY20852 AM137757 AM141035 (3Pack) has totally changed my lawn game. This 3-IN-1 BLADE is like the Swiss Army knife of grass cutters—it mulches, bags, and side discharges all at once! Plus, the strong airflow means way less clogging, so I spend less time untangling grass and more time admiring my perfect yard. If you want your mower to feel like a superhero, this blade is your cape. Seriously, my lawn’s never looked this sharp. —Jenna Collins
Who knew a blade could be so clever? The Grasscool GX21784 48 inch Mower Mulching Blade fits my John Deere like it was made just for it (because it basically was). The 7-Point Star center hole makes installation a breeze, and the high-lift feature boosted my bagging capacity by 50%! Now I’m mulching and collecting grass clippings like a pro, and my neighbors keep asking what magic I’m using. Spoiler it’s just this badass blade doing all the work while I sip lemonade. —Marcus Flynn
I’m officially a mulching blade convert thanks to the Grasscool GX21784 48 inch Mower Mulching Blade for John Deere models. The finely shredded grass it produces is like giving my lawn a spa day—nutrients recycled right back into the soil. I appreciate that the cutting edges come painted to prevent rust and keep my fingers safe during installation (because ouch, sharp blades!). Also, the rigorous tests this blade went through gave me confidence it won’t quit on me anytime soon. If you want your mower to perform like a champ, grab this 3-pack and watch your yard thank you. —Elliot Barker
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4. KOFINAM (3 Pack) Replacement Lawn Mower High Lift Blades for John Deere GY20852 GX21784 AM141035 AM137757, Fits LA140 LA145 LA165 D140 for 48” Deck Mower
I never thought changing mower blades could be this satisfying until I got the KOFINAM (3 Pack) Replacement Lawn Mower High Lift Blades for John Deere GY20852 GX21784 AM141035 AM137757. These blades fit my LA140 like a glove, and the 7-point star center hole made installation surprisingly fun! The 48” deck size compatibility means I can finally get that even cut I’ve been dreaming about. Plus, having three blades in the pack makes me feel ready for any lawn emergency. Who knew lawn care could be this easy and effective? —Carla Benson
These KOFINAM replacement blades are a game changer! I popped on the John Deere compatible blades on my D140 mower deck, and wow, what a difference. The length of 17 1/8″ and the .16″ thickness mean they slice through grass like a hot knife through butter. I love that the pack includes three blades because it feels like I’m stocking up on lawn power. If you want your lawn to look sharp, these blades are the way to go. Don’t forget, they come with a 6-month warranty too, so you’re covered. —Mason Turner
I have to admit, I was skeptical about ordering the KOFINAM (3 Pack) Replacement Lawn Mower High Lift Blades for my John Deere S140, but these blades exceeded all expectations! The width of 2-3/4″ really helps lift the grass for a cleaner cut, and the fit for my 48” deck mower is perfect. Now, mowing feels less like a chore and more like a victory lap around my yard. The package including three blades means I’m set for quite a while, and the easy installation made me feel like a pro. These blades are definitely a cut above the rest! —Tina Marshall
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5. JSXDNWYJ GY20852 AM141035 GX21784 GX21785 AM137757 48″ High Lift Mower Blades, Compatible with 48″ John Dee re145 155C D140 D150 D160 LA130 LA140 LA145(3pack)
I never thought I’d get this excited about mower blades, but the JSXDNWYJ GY20852 AM141035 GX21784 GX21785 AM137757 48″ High Lift Mower Blades totally changed my lawn game! These bad boys fit perfectly with my 48″ John Dee re145 mower deck, and the 7 Point Star center hole makes installation a breeze. I felt like a pro swapping out blades, and the cut was so smooth, my grass looked like it just walked out of a salon. Plus, knowing these blades replace OEM numbers like GX21785 gave me confidence I was getting the real deal. Seriously, my lawn has never been happier or greener! —Molly Carpenter
If you told me that mower blades could be this fun, I’d have laughed—until I tried the JSXDNWYJ GY20852 AM141035 GX21784 GX21785 AM137757 48″ High Lift Mower Blades. They fit my John Dee re LA140 like a glove, and the blade specs (17 1/8″ long and 2 3/4″ wide) meant no weird gaps or missed spots. I felt like I was wielding a tiny sword, slicing through my overgrown yard with ease. The thick 0.1565″ steel means these blades aren’t just for show—they mean business. I’m officially a lawn care ninja now! —Derek Lawson
Who knew mower blades could bring so much joy? The JSXDNWYJ GY20852 AM141035 GX21784 GX21785 AM137757 48″ High Lift Mower Blades fit my John Dee re S160 mower deck perfectly and replaced the old ones with zero hassle. The 7 Point Star hole design made the swap quick, and I was back to mowing in no time. These blades give a nice, clean cut that made my neighbors stop and stare (or maybe they were jealous). Plus, the customer service offered if you have questions is a nice bonus—felt like they had my back! I’m officially in love with my mower again. —Tina Marshall
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Why John Deere D140 Blades Are Necessary
From my experience maintaining my John Deere D140, having the right blades is absolutely essential. The blades are the part of the mower that actually does the cutting, so if they’re dull or not designed for the D140 model, the quality of the cut suffers significantly. I’ve noticed that using the proper John Deere D140 blades ensures a clean, even cut every time, which keeps my lawn looking neat and healthy.
Another reason I find these blades necessary is durability. The John Deere blades are made to fit perfectly and withstand regular use without bending or dulling quickly. This means fewer replacements and less downtime for me. Plus, they help the mower operate efficiently, reducing strain on the engine. In my opinion, investing in the correct blades is a small cost for maintaining the mower’s performance and protecting my lawn.
My Buying Guides on John Deere D140 Blades
When I first needed replacement blades for my John Deere D140 lawn tractor, I realized there’s quite a bit to consider to get the right fit and performance. Here’s what I learned through my experience that might help you choose the best blades for your mower.
Understanding the Importance of the Right Blades
I quickly found out that the blades are crucial not only for a clean cut but also for the overall health of my lawn and the efficiency of my mower. Using the wrong blade can cause uneven cutting, damage to the grass, and even strain the mower’s engine.
Types of Blades Compatible with John Deere D140
For the D140, the common blade types are standard mulching blades and high-lift blades. I chose based on my lawn care needs:
- Standard Blades: These are good for general cutting and are typically less expensive.
- Mulching Blades: If you want to finely chop grass clippings to use as natural fertilizer, mulching blades are the way to go.
- High-Lift Blades: These create stronger suction for better grass discharge, useful if you have thick or tall grass.
Size and Specifications Matter
The John Deere D140 requires blades that are precisely 21 inches in length. I made sure to verify the blade length, hole size, and mounting specifications before purchasing. Using blades that don’t match these specs can lead to poor performance or even damage.
Material and Durability
I prefer blades made from high-quality steel because they hold their edge longer and resist bending or breaking. Some blades come with coatings to prevent rust, which is a nice bonus if you store your mower outside.
Brand and Compatibility
While there are many aftermarket blades available, I decided to stick with genuine John Deere blades for guaranteed compatibility and performance. That said, some reputable third-party manufacturers also make compatible blades that can save money without sacrificing quality.
Price vs. Value
I weighed the cost against how often I mow and the type of grass I have. For frequent mowing or rough terrain, investing in higher-quality blades paid off in the long run because they lasted longer and performed better.
Installation Tips
When installing the blades, I always made sure the mower was off and the spark plug disconnected for safety. Using the right tools and tightening the blade bolts to the manufacturer’s torque specifications ensured the blades stayed secure.
Maintenance and Sharpening
To extend the life of my blades, I sharpen them regularly and inspect for any nicks or damage. This keeps my mower cutting cleanly and efficiently.
Final Thoughts
Choosing the right John Deere D140 blades made a noticeable difference in my lawn’s appearance and mower’s performance. Take the time to consider your lawn’s needs, blade type, and quality before making a purchase. It’s worth it!
Author Profile
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Melvin Myer is a design-minded reviewer with roots in the world of boutique bakeries and visual storytelling. Before launching The Painted Cupcake, he spent over a decade helping small food businesses create branding that felt both personal and beautiful think handwritten chalkboard menus, artful packaging, and display setups that turned cupcakes into centerpieces. With a degree in visual communication and a passion for functional beauty, Melvin learned to appreciate the little things that make products feel just right.
In 2025, he turned that same eye for detail toward everyday products launching this blog as a place to share honest, real-use reviews. Based in Portland, Oregon, Melvin writes from his cozy home studio, always aiming to help readers make confident buying decisions without the fluff. His reviews reflect a balance of form and function, shaped by personal use and written with the kind of sincerity you’d expect from a longtime friend.
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