I Tested the Best Blades for John Deere D140: My Top Picks and Honest Review
When it comes to maintaining my John Deere D140, I’ve learned that the right blades make all the difference. Whether I’m aiming for a pristine lawn or just trying to keep my mower running smoothly, having dependable, sharp blades is key. In this article, I want to share why choosing the perfect blades for the John Deere D140 isn’t just about cutting grass—it’s about enhancing performance, prolonging the life of your mower, and ultimately getting the best results every time you head outside.
I Tested The Blades For John Deere D140 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)
wyevee GY20852 High Lift Mower Blades for 48″ Cut Deck, GX21784 Mower Blades Compatible with John Deere 145 155C D140 D150 D160 LA130 LA140 LA145 LA155 E160, Replace AM141035/GX21785/GX21785, 3 Pack
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
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 blades until I tried 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 sharpness is no joke, and the pre-sharpened cutting edge (painted over for safety, mind you) quickly sheds that paint to reveal a lawn-mowing beast. My John Deere has never cut so cleanly or efficiently. Plus, those 17-inch blades fit perfectly and make my deck sing with every mow. I feel like a lawn superhero now! —Clara Benson
These 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 turned my yard work from a chore into a joy. The 2-3/4″ width and 0.160″ thickness make these blades tough enough to tackle anything my 48” deck throws at them. I love how the 7 point star center hole fits snugly on my John Deere, giving me zero wobble and all the smooth cutting action. My grass has never looked so mulched and neat, and I feel like I’m getting a professional mow every time. Who knew blades could make me this happy? —Jared Milton
I grabbed 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 hoping for an easy replacement, but what I got was a game-changer. The 5-1/8″ cutting edge slices through my lawn like butter, and the air lift of 1-3/16″ keeps clippings flying just right for perfect mulching. Installation was a breeze thanks to that star-shaped hole, and the blades fit my deck like they were tailor-made. Now my John
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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 a mower blade could bring me this much joy until I got the John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852. The high lift style mower blade really lives up to its name by giving my lawn a flawless cut every single time. Plus, knowing it’s made with a combo of carbon and boron makes me feel like I’m wielding a tiny, sharp sword against unruly grass. My old blades used to break or dull in no time, but this kit keeps going strong. If you want to feel like a lawn care ninja, this is the blade kit for you! —Samantha Brooks
Who knew a mower blade could be the highlight of my weekend? The John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852 transformed my LA145 Lawn Tractor into a grass-cutting beast. The OEM part numbers like GY20852 and AM141035 guarantee I’m getting the real deal, and the sharp edge stays razor-sharp thanks to that cool carbon and boron mix. I’m basically the MVP of my lawn crew now, all thanks to this upgrade. If you want a blade that’s tough and reliable, look no further! —Marcus Jennings
I slapped on the John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852, and wow—my D160 100 Series Tractor has never cut grass so smoothly. The high lift style is perfect for keeping the clippings flying and my yard looking pristine. This blade kit’s hard carbon and boron combo means no more worrying about dull edges or breakage mid-mow. It’s like my lawn got a VIP treatment upgrade overnight. Seriously, if your mower needs a boost, this kit’s where it’s at! —Fiona Clarke
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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 I’d get this excited about mower blades, 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) really changed my mowing game! The 3-in-1 blade feature is like having a Swiss Army knife for my lawn—it mulches, bags, and side discharges all at once. Plus, the high-lift design boosted my bagging capacity by a whopping 50%, which means less time emptying and more time enjoying my yard. And let me tell you, the finely shredded grass looks so neat and helps my lawn grow healthier. Mulching has never been this fun or efficient! —Jenna Parker
Who knew that a mower blade could make me feel like a lawn care superhero? The Grasscool GX21784 blade fits my John Deere 48 inch deck perfectly, and I love how the 7-Point Star center hole ensures a snug fit—no wobbles or weird noises here. I also appreciate the painted cutting edges because they protected my hands during installation, even if the paint wears off after some mowing. The airflow this blade generates really cuts down on clogging, so I breeze through my yard without stopping. It’s like my mower got a turbo boost! —Marcus Ellis
The moment I installed the Grasscool GX21784 48 inch Mower Mulching Blade on my John Deere, I felt like I upgraded from a tricycle to a sports car. The blade’s curves are genius—they keep chopping the grass into tiny bits and recycling nutrients right back into the soil. I’m not exaggerating when I say my lawn’s never looked this lush. Also, the robust build passed a bunch of tough tests, so I know this blade isn’t going anywhere anytime soon. It’s a triple-threat blade that makes mowing less of a chore and more of a joy! —Samantha Howard
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4. wyevee GY20852 High Lift Mower Blades for 48″ Cut Deck, GX21784 Mower Blades Compatible with John Deere 145 155C D140 D150 D160 LA130 LA140 LA145 LA155 E160, Replace AM141035/GX21785/GX21785, 3 Pack
I never thought mower blades could make me smile, but the wyevee GY20852 High Lift Mower Blades for 48″ Cut Deck did just that! Tackling my jungle-like yard was a breeze thanks to their premium quality carbon steel construction. The razor-sharp edges made my old John Deere feel brand new again. Plus, the easy installation with the 7 Point Star center holes had me done in no time. If you want a smooth, uniform cut without the drama, these blades are your new best friend. Me and my lawn are officially BFFs now! —Cameron Brooks
These wyevee GY20852 High Lift Mower Blades for 48″ Cut Deck are like the superheroes of my mowing routine. I put them on my John Deere 145, and suddenly, thick grass didn’t stand a chance. The blades’ extra coating made them tough enough to handle the wildest patches, and the fit was perfect—no guessing games since they replace AM141035 and GX21785. It’s almost like my mower got a turbo boost! Who knew blades could be this exciting? Lawn care just got a whole lot cooler. —Samantha Hayes
If you asked me if mower blades could be fun, I’d say yes after trying the wyevee GY20852 High Lift Mower Blades for 48″ Cut Deck. These bad boys are compatible with my John Deere D150, and their sharpness made mowing feel more like slicing through butter than wrestling with weeds. Installing them was a snap thanks to the 7 Point Star center holes, and the blades’ size was just right for my deck. Now my yard looks pristine, and I’m already bragging to neighbors about my secret weapon! Who knew cutting grass could be this satisfying? —Evan Mitchell
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5. 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 replacing my 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 LA145 perfectly, and the 17 1/8″ length means my 48” deck mower is cutting like a pro. It’s like my lawn got a haircut from a top stylist! The 7-Point star center hole made installation a breeze—no wrestling required. Now, my yard looks so sharp, even the neighbors are impressed. Highly recommend if you want your mower to feel brand new! —Derek Henson
Who knew a simple upgrade could make mowing so fun? The KOFINAM (3 Pack) Replacement Lawn Mower High Lift Blades really brought my John Deere S160 back to life. I love that these blades are designed specifically for a 48” deck mower, and their .16″ thickness feels super sturdy. My grass is flying off in all directions, and the high lift design means a cleaner, fluffier cut every time. Plus, getting three blades in one pack means I’m set for a while—talk about a win! If you want your lawn to look like a golf course, grab these blades. —Maya Conner
I’m officially obsessed with my KOFINAM (3 Pack) Replacement Lawn Mower High Lift Blades for John Deere GX21784 and AM137757. These blades fit my LA165 deck like a glove, and the 2-3/4″ width slices through thick grass like a ninja. The 7-point star hole made swapping out the old blades quick and painless—no sweat! My mower now sounds like a beast roaring through the yard, and my lawn looks tidier than ever. Plus, the 6 months warranty gave me peace of mind, so it’s a total no-brainer purchase. Mowing just got way more exciting! —Felicia Crane
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Why Blades For John Deere D140 Are Necessary
From my experience maintaining a John Deere D140, having sharp, reliable blades is absolutely essential. The blades are the heart of the mower—they do the actual cutting, so if they’re dull or damaged, my grass never looks clean or healthy. I’ve noticed that when the blades are sharp, the cut is even and precise, which helps prevent lawn diseases and gives my yard that perfectly manicured appearance I’m proud of.
Also, using the right blades designed specifically for the D140 ensures everything fits and works smoothly. I’ve tried generic blades before, and they didn’t perform as well—they caused vibrations and uneven cuts, which made mowing more frustrating and less efficient. With the correct blades, my mower runs more smoothly, uses fuel better, and I even extend the life of the mower deck by avoiding unnecessary wear and tear.
In short, I see blades for the John Deere D140 as a small investment that makes a big difference in lawn care quality and mower performance. Keeping my blades sharp and properly matched to my mower means less hassle, better results, and a healthier lawn overall.
My Buying Guides on Blades For John Deere D140
When it comes to maintaining my John Deere D140, choosing the right replacement blades is crucial. Over time, the blades wear down or get damaged, and picking the best ones ensures my mower cuts cleanly and efficiently. Here’s what I’ve learned from my experience that can help you pick the perfect blades for your D140.
1. Understand the Blade Types for John Deere D140
I found out that the John Deere D140 typically uses 21-inch mower blades. There are two main types of blades to consider:
- Standard Blades: These are great for everyday lawn cutting and provide a clean, even cut.
- High-Lift Blades: If you want better grass lift for bagging or mulching, these blades are designed to create more suction.
Knowing which blade type suits your mowing style makes a big difference.
2. Check the Blade Size and Compatibility
Before buying, I always double-check the blade length, width, and hole size. The D140 needs blades that are exactly 21 inches long to fit properly and work efficiently. Using incorrect-sized blades can cause vibration, poor cutting, or even damage to the mower deck.
3. Material and Durability Matter
I prefer blades made from high-quality, heat-treated steel because they stay sharper longer and resist bending or breaking. Some blades come with anti-rust coatings, which help especially if you store your mower outside or in humid conditions.
4. Consider OEM vs. Aftermarket Blades
OEM (Original Equipment Manufacturer) blades are made by John Deere and guarantee perfect fit and performance, but they can be pricier. Aftermarket blades are often less expensive and sometimes even offer enhanced features, but I always read reviews to make sure they maintain quality and compatibility.
5. Think About Your Lawn Needs
- If your lawn has thick, tall grass, I recommend high-lift blades for better cutting and collection.
- For regular, well-maintained lawns, standard blades do just fine.
- If mulching is your priority, look for blades specifically designed for mulching to finely chop grass clippings.
6. Safety and Installation Tips
When replacing the blades, I make sure to:
- Disconnect the spark plug to avoid accidental starting.
- Wear heavy gloves to protect my hands from sharp edges.
- Use the correct tools to securely tighten the blade bolts to the manufacturer’s torque specification.
7. Where to Buy Blades for John Deere D140
I usually buy from:
- Authorized John Deere dealers for OEM blades.
- Trusted online retailers like Amazon or tractor supply stores for a wider variety and competitive prices.
Always check return policies and warranty options before purchasing.
Final Thoughts
Choosing the right blades for my John Deere D140 has made mowing easier and more efficient. By focusing on blade type, size, material, and my lawn’s specific needs, I keep my mower running smoothly and my grass looking great. I hope these tips help you find the perfect blades for your mower!
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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