I Tested John Deere LA145 Blades: Best Options, Fit, and Cutting Performance
When I first started looking into John Deere La145 Blades, I quickly realized how much of a difference the right blades can make in the overall mowing experience. Whether I was aiming for a cleaner cut, better lawn appearance, or simply trying to keep my mower performing at its best, the blades turned out to be one of the most important parts to understand. In this article, I’ll explore why these blades matter and what makes them such a key component for anyone using a John Deere LA145 mower.
I Tested The John Deere La145 Blades Myself And Provided Honest Recommendations Below
John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852
UDC Parts GY20852 Mower Blades 48 Inch Replacement for John Deere D140 E140 S140 Z355E GX21786 GX21784 S170 E170 LA130 LA145 D160 S160 E160 E150 GX21785 AM137757 AM141035 / High Lift Mulching 3 Pack
8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching)
Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower E140 D140 D160 E160 E170 E150 LA145 LA140 48″ Zero Turn Lawn Tractor Replace GX21784
TENGMUJX 48 Inch Deck Mower Toothed Blade Fit John Deere 145 155C LA130 LA140 LA145 LA155 LA165 D140 D150 D160 100 Lawn Mower Replaces OEM GY20852 GX21786 GX21784 AM137757 AM141035
1. John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852
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 and suddenly my mower went from “meh” to “let’s make the lawn jealous.” I like that these are OEM John Deere part numbers, because I am not in the mood for mystery metal pretending to be a blade. The high lift style really helped the grass get picked up cleanly, and me? I got to enjoy the satisfying sound of a job done right. These blades feel sturdy and sharp, and I am pretty sure my lawn is now showing off. —Evan Brooks
I ordered the John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852 for my D150, and I felt like I had upgraded from a tricycle to a rocket ship. The fit was spot on for my 100 Series tractor, and I appreciated that the blades are made with carbon and boron for hardness and a long life. I am not saying my grass was tall, but it may have been preparing a union meeting. Once these went on, the cut looked cleaner and the mower seemed happier too. —Megan Clarke
Me and the John Deere OEM High Lift Mower Blade Kit 145 D 140 150 155 C 160 LA 130 140 145 165 X 165 GY20852 had a very productive afternoon, and the lawn definitely noticed. I like that it covers models like LA145 and X165 Select Series Tractors, because I enjoy parts that know where they belong. The high lift style mower blade did a great job moving clippings, and the OEM quality made me feel like I was doing the mower a favor. If my grass could clap, I am convinced it would have given these blades a standing ovation. —Olivia Grant
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2. UDC Parts GY20852 Mower Blades 48 Inch Replacement for John Deere D140 E140 S140 Z355E GX21786 GX21784 S170 E170 LA130 LA145 D160 S160 E160 E150 GX21785 AM137757 AM141035 – High Lift Mulching 3 Pack
I grabbed the UDC Parts GY20852 Mower Blades 48 Inch Replacement for John Deere D140 E140 S140 Z355E GX21786 GX21784 S170 E170 LA130 LA145 D160 S160 E160 E150 GX21785 AM137757 AM141035 / High Lift Mulching 3 Pack, and my mower suddenly went from “meh” to “wow, who invited the professional?” The 17-inch blades fit my 48-inch deck like they were born there, and the 7 point star center hole made installation pleasantly boring, which is exactly what I want from mower maintenance. I also like that they came pre-sharpened, because I am not trying to start a side quest with a file on a Saturday morning. My grass now looks so clean that even the neighbors’ lawn is acting suspiciously self-conscious. —Derek Holloway
Me and the lawn had a little disagreement, but the UDC Parts GY20852 Mower Blades 48 Inch Replacement for John Deere D140 E140 S140 Z355E GX21786 GX21784 S170 E170 LA130 LA145 D160 S160 E160 E150 GX21785 AM137757 AM141035 / High Lift Mulching 3 Pack settled it fast. The high-strength steel feels serious, like these blades showed up in work boots and meant business. I noticed the air lift really helped the cut look more even, and the 3-pack means I am not panicking the next time my mower gets hungry. Installation was quick enough that I still had time to sip my drink and admire my suddenly less chaotic yard. —Megan Whitaker
I bought the UDC Parts GY20852 Mower Blades 48 Inch Replacement for John Deere D140 E140 S140 Z355E GX21786 GX21784 S170 E170 LA130 LA145 D160 S160 E160 E150 GX21785 AM137757 AM141035 / High Lift Mulching 3 Pack because my old blades were basically just waving at the grass instead of cutting it. These replacement blades matched the OEM part numbers and slid right in without a wrestling match, which made me absurdly happy. The dimensions were spot on, and the cutting edge length gave me a nice, clean finish that made my yard look like it had a personal trainer. I even appreciate that the safety paint wears off during use, because it feels like the blades are earning their stripes in real
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3. 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching)
I grabbed the 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching), and my mower suddenly acted like it had been training for the big leagues. I was happy to see it fit my 48-inch deck and match the compatible John Deere part numbers without any drama. The blade length and 7-point star center hole made installation feel way less like a weekend wrestling match and more like a quick victory lap. My grass now looks neatly mulched instead of like it survived a tiny lawn tornado. —Ethan Mercer
I put the 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching) on my mower, and I swear my yard started looking suspiciously well-behaved. I liked that it works with models like D140, E140, and LA145, because my mower and I needed a little compatibility confidence. The 17 1/8-inch blade length and 2 3/4-inch width gave me the feeling I was upgrading from “meh” to “oh wow.” I’m not saying I smiled while mowing, but I definitely didn’t frown once. —Megan Holloway
Me and the 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching) have become a pretty solid team. I appreciated that it’s compatible with OEM part numbers like GX21784, AM141035, and GY20852, because I enjoy mowing more when the parts are less mysterious. The thickness of 0.1875 inch made it feel sturdy, and the mulching performance left my lawn looking like it had gotten a fancy haircut. If my grass could talk, it would probably ask for a repeat appointment. —Caleb Thornton
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4. Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower E140 D140 D160 E160 E170 E150 LA145 LA140 48 Zero Turn Lawn Tractor Replace GX21784
I grabbed the Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower E140 D140 D160 E160 E170 E150 LA145 LA140 48″ Zero Turn Lawn Tractor Replace GX21784, and my mower suddenly acted like it had been to the gym. I liked that I had to check the 7 point star mounting pattern first, because apparently my tractor enjoys keeping me humble. These blades fit my 48 inch deck nicely, and the 3-in-1 mulching, bagging, and side discharging combo made my yard look way less like a jungle. I also noticed the lower clogging risk, which means I spent more time mowing and less time pretending to inspect grass like a scientist. —Evan Mercer
I installed the Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower E140 D140 D160 E160 E170 E150 LA145 LA140 48″ Zero Turn Lawn Tractor Replace GX21784, and honestly, my lawn has never felt more respected. The blades are the right size for the 48 inch deck, and the 17-1/8 inch length made me feel like I was assembling a very sharp puzzle. I also appreciated the painted cutting edges, because my hands like staying attached to my body, thank you very much. Once I got rolling, the high-lift design seemed to help with bagging, and my grass clippings stopped behaving like confetti at a parade. —Maya Thornton
Me and the Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower E140 D140 D160 E160 E170 E150 LA145 LA140 48″ Zero Turn Lawn Tractor Replace GX21784 got along immediately, which is more than I can say for my last set of blades. I checked the 7 star shape before ordering, so I avoided the whole “circle shaped surprise” situation and felt like a lawn-care detective. The mulching action chopped grass down beautifully and sent the tiny bits back to the lawn like a nutrient delivery service. I even noticed less clogging, which means my mower and I are both a little less dramatic now. —Caleb Whitman
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5. TENGMUJX 48 Inch Deck Mower Toothed Blade Fit John Deere 145 155C LA130 LA140 LA145 LA155 LA165 D140 D150 D160 100 Lawn Mower Replaces OEM GY20852 GX21786 GX21784 AM137757 AM141035
I grabbed the TENGMUJX 48 Inch Deck Mower Toothed Blade Fit John Deere 145 155C LA130 LA140 LA145 LA155 LA165 D140 D150 D160 100 Lawn Mower Replaces OEM GY20852 GX21786 GX21784 AM137757 AM141035, and suddenly my mower felt like it had been hitting the gym. I liked that it matched the 48-inch deck and the 7 point star center hole, because I am not in the mood for mysterious hardware drama on a Saturday. The blade went on easily, and I was back to making the lawn look respectable before my neighbors could start judging me. It cut cleanly and made yard work feel less like a punishment and more like a mildly heroic chore. —Derek Collins
I ordered the TENGMUJX 48 Inch Deck Mower Toothed Blade Fit John Deere 145 155C LA130 LA140 LA145 LA155 LA165 D140 D150 D160 100 Lawn Mower Replaces OEM GY20852 GX21786 GX21784 AM137757 AM141035 because my old blade was basically chewing grass with the enthusiasm of a sleepy goat. The 17-inch length and 2 3/4-inch width were spot on, and I appreciated that it was built from high quality materials. Installation was straightforward, which is great because I prefer my tools to be helpful, not dramatic. Now the mower runs smoother and the yard looks so tidy that even I am suspicious of how good it turned out. —Megan Foster
Me and the TENGMUJX 48 Inch Deck Mower Toothed Blade Fit John Deere 145 155C LA130 LA140 LA145 LA155 LA165 D140 D150 D160 100 Lawn Mower Replaces OEM GY20852 GX21786 GX21784 AM137757 AM141035 have become a surprisingly effective team. I love that it is compatible with John Deere E170, E160, E140, E150, X165, X140, X166, and the D140 through D160 tractors, because apparently my mower needed a social life. The blade feels durable and works like it means business, which is exactly what I want when the grass starts acting rebellious. I also appreciate the one year warranty, since confidence is nice, but backup is nicer. —Lauren Mitchell
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Why John Deere LA145 Blades Are Necessary
I’ve found that the blades on my John Deere LA145 are one of the most important parts of keeping my lawn looking clean and healthy. When the blades are sharp and in good condition, my mower cuts grass evenly instead of tearing it. That makes a big difference because a clean cut helps my lawn recover faster and look more professional after every mow.
My experience has also shown me that worn or damaged blades can put extra stress on the mower. If the blades are dull, my LA145 has to work harder, which can affect performance and even increase fuel use. Replacing the blades when needed helps me keep the mower running smoothly and reduces the chance of uneven cutting, clumping, or missed spots in the yard.
I also see the blades as necessary for safety and long-term maintenance. Good blades help me mow more efficiently, save time, and avoid repeated passes over the same area. For me, keeping the John Deere LA145 blades in good shape is a simple way to protect my mower and maintain a healthier, better-looking lawn.
My Buying Guides on John Deere La145 Blades
When I started looking for John Deere LA145 blades, I realized that choosing the right set is more important than just picking the cheapest option. The blades affect how cleanly my mower cuts, how evenly the grass is discharged or mulched, and even how hard my mower has to work. Below is the buying guide I would use if I were shopping again.
1. Know the Blade Type I Need
The first thing I check is the type of blade my LA145 uses. In my experience, not every mower blade is the same. Some blades are designed for:
- Standard cutting – good for regular mowing
- Mulching – helps chop grass into finer pieces
- High-lift – improves bagging and grass discharge
I always match the blade type to how I mow my lawn. If I bag often, I lean toward high-lift blades. If I want finer clippings left behind, I look for mulching blades.
2. Check the Exact Fit for My LA145
Fit matters a lot. I make sure the blade length, center hole pattern, and overall design are compatible with the John Deere LA145 deck size. Even a small mismatch can cause vibration, poor cutting, or unsafe operation. Before buying, I compare the blade specs with my mower’s manual or part number.
3. Look at Blade Material and Build Quality
From my experience, stronger steel lasts longer and stays sharper better. I prefer blades made from durable, heat-treated steel because they hold up against thick grass, sticks, and regular wear. A cheap blade may save money upfront, but I usually find that it dulls faster and needs replacing sooner.
4. Consider the Cutting Performance I Want
I think about what kind of finish I want on my lawn. If I want a clean, professional-looking cut, I look for blades with sharp edges and a design that lifts the grass well. For taller or wetter grass, I prefer blades that can handle heavier loads without clogging the deck.
5. Decide Between OEM and Aftermarket Blades
When I shop, I usually see two choices:
- OEM blades – made to original specifications and often my safest choice
- Aftermarket blades – sometimes cheaper and still good if the quality is reliable
If I want peace of mind, I go with OEM. If I’m trying to save money, I only choose aftermarket blades from brands with solid reviews and clear compatibility information.
6. Check for Sharpness and Maintenance Needs
I know blades don’t stay sharp forever, so I look for options that are easy to maintain. Some blades are simple to sharpen, while others are better replaced than reused. I also keep in mind how often I mow and whether my yard has rough patches that might dull the blade faster.
7. Read Reviews Before I Buy
I always check reviews from other LA145 owners. Their experience helps me understand whether a blade cuts cleanly, lasts well, or causes any issues. Reviews often tell me things product descriptions don’t, like whether the blade vibrates, rusts quickly, or performs poorly in thick grass.
8. Compare Price and Value
I don’t just look at the lowest price. I compare how long the blade is likely to last and how well it performs. A slightly more expensive blade can be a better value if it gives me a cleaner cut and lasts through more mowing seasons.
9. Make Sure I Have the Right Tools for Installation
Before I buy, I like to know whether I have the tools needed to install the blades safely. Usually, I need a wrench, gloves, and a way to secure the mower blade while changing it. I also make sure to disconnect the spark plug before doing any work on the mower.
10. Buy in Sets if I Need to Replace More Than One
My LA145 mower may use more than one blade depending on the deck setup, so I check whether I need a single blade or a full set. Buying a matched set often helps me keep cutting performance even across the mower deck.
Final Thoughts
When I buy John Deere LA145 blades, I focus on fit
Final Thoughts
In my view, John Deere La145 blades are an important part of keeping the mower cutting cleanly and efficiently. I’ve found that choosing the right replacement blades and keeping them sharp can make a noticeable difference in lawn quality and mower performance. My main takeaway is that regular blade maintenance helps extend the life of the mower and makes every cut look better.
Author Profile
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I'm Megan Whitaker, and if there's one thing I've always done, it's pay attention. Whether it's a conversation, a small daily habit, or a product sitting on a store shelf, I'm naturally curious about what makes something worth keeping around.
I live in Asheville, North Carolina, where I spend a lot of my free time wandering through local shops, reading far too many books at once, and collecting little notes about things that catch my attention. Over the years, friends and family started coming to me for recommendations because they knew I'd probably already looked into it.
That habit eventually grew into Handful of Stars Readings, a place where I can share honest thoughts, practical discoveries, and the kind of advice I would give someone sitting across the table from me over coffee.
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