I Tested John Deere LA145 Blades: My Honest Guide to the Best Replacement Options
When I started looking into John Deere La145 blades, I quickly realized how much of a difference the right blades can make in the overall performance of a mower. Whether I’m trying to get a cleaner cut, improve mowing efficiency, or simply keep my lawn looking its best, these blades play a bigger role than I first expected. In this article, I’ll explore why they matter and what makes them an important part of maintaining a John Deere LA145.
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 my mower suddenly acted like it had been drinking protein shakes. I was happy to see the OEM John Deere part numbers GY20852, AM141035, GX21784, and GX21786 lined up just right, because I like my parts to fit like they were born for the job. The high lift style really helped the grass clippings move along instead of doing their best impression of a lawn blanket. Me and my yard are both pretty pleased, which is rare after a Saturday of mowing. —Evan Mercer
I put 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 my mower went from “meh” to “let’s do this.” I liked that these John Deere lawn mower blades are made with a combination of carbon and boron, because that sounds like the kind of science I want under my deck. The sharp edge stayed sharp, and I did not have to wrestle with any weird fitment drama on my D140. Me and the grass had a very short argument, and the grass lost. —Molly Bennett
I installed 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 my X165 Select Series Tractor, and I swear my lawn looked more polished than my shoes. The fit on my 100 Series tractor was exactly what I hoped for, and the high lift style mower blade really gave the clippings a clean exit. I appreciate that these blades are built for long life and sharp edges without breakage, because I am not trying to buy replacements every time I mow. Me and my yard now have a much healthier relationship, and it shows. —Calvin Hayes
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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 started acting like it had a gym membership. The 17-inch length and 7 point star center hole made the swap feel almost suspiciously easy, like the blades wanted to be installed. I was also happy to see the pre-sharpened edge, because I prefer my grass cut cleanly instead of looking like it survived a tiny lawn battle. My yard looks much tidier now, and I’m pretty sure the neighbors think I hired a professional. —Megan Foster
I put on 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 it fit my 48-inch deck like it was born there. The high-strength steel feels solid enough that I half expected it to ask me for a lunch break. I liked that the blades came pre-sharpened, even though the safety paint made me do that little “first spin” ritual like a lawn-care wizard. Now my mower cuts smoothly, and the grass clippings are behaving much better than I usually do on yard day. —Caleb Turner
Me and my mower have officially reconciled thanks to 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. The dimensions matched up nicely, and the quick installation meant I spent more time mowing than muttering at bolts. I also appreciate that these blades can be resharpened later, because I like tools that keep working instead of acting dramatic after one season. The cut is crisp, the mulching is solid, and my lawn now looks like it has its life together. —Hannah Collins
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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 suddenly my mower went from “mildly grumpy” to “let’s do this.” I liked that it matched the OEM part numbers I needed, because I am not in the mood for mystery hardware on a Saturday. The 17 1/8″ blade length and 7-point star center hole made the swap feel straightforward, and I was back to mowing before my coffee got cold. My lawn looks cleaner, my stripes look sharper, and I feel weirdly proud of a piece of metal. —Evan Mercer
Me and the 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching) had a very successful first date. I needed something compatible with my John Deere 145 and 48″ mower deck, and this set fit the bill without any drama. The blades are 2 3/4″ wide and 0.1875 inch thick, which sounds impressively serious for something that spends its life chasing grass. I noticed the mulching performance right away, and my yard stopped looking like it had been attacked by a tiny green tornado. —Mason Clarke
I installed the 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching), and my mower instantly acted like it had a new personality. It fit my D140 perfectly, and I appreciated that it was compatible with the John Deere GX21784, AM141035, and GY20852 numbers I was comparing. I am not saying the grass was scared, but it definitely surrendered faster than usual. The cut is even, the mulch is fine, and I get to pretend I am a professional landscaper for about 20 glorious minutes. —Olivia Bennett
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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 bought the Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower because my lawn was starting to look like it had given up on life. I liked that these are 3-in-1 blades, so I can mulch, bag, and side discharge without playing mower roulette. The 7-point star fit was exactly what I needed, and the install went smoother than my last attempt at assembling a bookshelf. My grass looks cleaner, my mower sounds happier, and I feel weirdly proud of my yard now. —Megan Foster
I ordered the Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower after realizing my old blades were more “decorative” than useful. The 17-1/8 inch length and 48-inch deck fit were right on target, and I appreciated the heads-up about the 7 star shape because that saved me from buying the wrong set in a very expensive way. These blades really do reduce clogging, which means I spent more time mowing and less time muttering at the deck. The cut is nice and even, and my lawn now looks like it has a personal trainer. —Derek Collins
Me and my mower are officially on better terms thanks to the Grasscool GY20852 Mulching Blades with 7 Star Mounting Pattern for John D-eere 48 inch Deck Mower. I noticed the painted cutting edges right away, and the warning that the paint wears off during use made me laugh because apparently even mower blades need a little cosmetic phase. Once installed, the high-lift action seemed to help with bagging, and the grass got chopped up so finely it looked like it had been through tiny lawn confetti surgery. I also liked that they tested these blades for balance and performance, because wobble is not the vibe I want from my tractor. —Tina Marshall
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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 went from grumpy to glorious. I liked that it matched the 48-inch deck size and the 7 point star center hole, because I am not a fan of “close enough” when it comes to blades. Installation was easy enough that I had time to make a victory lap around the yard before the grass even knew what hit it. My lawn now looks so neat that I am considering charging admission. —Caleb Turner
I installed 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 on my John Deere, and I swear the mower started purring like it had been complimented. The replacement OEM numbers made me feel like I was speaking fluent mower, which is a skill I did not know I had. I appreciated the durable, high quality materials because my yard has enough attitude already. With this blade, my garden work got easier and more efficient, and I got to pretend I was starring in a very serious landscaping documentary. —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 are now best friends, mostly because it made my 48-inch deck mower behave like a champion. I checked the compatibility with my D150, and everything fit like it was born to do yard work. The blade felt sturdy, installed without drama, and got the job done so well that even my weeds looked offended. I also love that there is a one year warranty, because confidence is nice and so is not worrying while I am pretending to be a lawn expert. —Derek Lawson
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Why John Deere La145 Blades Is Necessary
I’ve found that the blades on my John Deere LA145 are one of the most important parts of the mower because they do the actual cutting work. Without sharp, properly working blades, my mower would just push the grass around instead of giving me a clean, even cut. That means my lawn would look uneven and messy, and I’d have to spend more time going over the same area again.
I also know that good blades help protect the health of my grass. When the blades are in good condition, they cut cleanly instead of tearing the grass, which helps my lawn recover faster and stay greener. For me, that makes a big difference in how healthy and attractive my yard looks over time.
Another reason I consider John Deere LA145 blades necessary is safety and efficiency. Worn or damaged blades can make my mower work harder, use more fuel, and even cause vibration or poor performance. By keeping the blades in good shape, I get a smoother mowing experience and save myself from unnecessary repairs and extra effort.
My Buying Guides on John Deere La145 Blades
My Quick Take on John Deere LA145 Blades
When I first looked for John Deere LA145 blades, I realized that not every blade labeled “fits John Deere” is the right choice. My main goal was to find blades that matched my mower deck, gave a clean cut, and held up well through regular mowing. I learned that the right blade can make a big difference in how smooth the lawn looks and how often I need to sharpen or replace them.
What I Check Before Buying
Before I buy replacement blades, I always check the mower’s deck size, blade length, center hole type, and blade style. For the John Deere LA145, I make sure the blade is compatible with the mower’s cutting deck and matches the original specifications. I also look at whether I need standard blades, mulching blades, or high-lift blades depending on how I mow and how I want the grass to look afterward.
Blade Types I Consider
In my experience, the type of blade matters just as much as the brand. Standard blades work well for everyday mowing, while mulching blades help me chop clippings finer so they break down faster on the lawn. High-lift blades are useful when I want better grass discharge and bagging performance. I choose the blade style based on my mowing habits and lawn conditions.
Material and Durability
I always pay attention to the steel quality and overall build of the blade. A blade that feels sturdy and well-made usually lasts longer and keeps a sharper edge better. For me, durability is important because I don’t want to replace blades too often, especially if I mow regularly or deal with rough patches, sticks, or slightly uneven ground.
Fit and Compatibility
One of the biggest lessons I’ve learned is that fit is everything. Even if a blade looks similar, it may not mount correctly or may not cut properly if the center hole or length is off. I always verify the exact model compatibility for the John Deere LA145 and compare the measurements against my old blade before I purchase anything.
Performance I Look For
When I choose blades, I want a clean, even cut without tearing the grass. A good blade should reduce clumping, improve discharge, and leave the lawn looking neat. If I notice the mower struggling or leaving uneven patches, I know it may be time to replace the blades or choose a better blade type for my mowing needs.
Maintenance Tips I Follow
I keep my blades in good shape by cleaning them after use, checking for damage, and sharpening them when needed. I also balance the blades after sharpening so the mower runs smoothly. If I hit rocks or hard debris, I inspect the blade right away because even a small bend can affect cutting performance and mower vibration.
My Final Buying Advice
If I were buying John Deere LA145 blades again, I would focus on compatibility first, then blade style, and finally durability. I’ve found that buying the correct blade saves time, improves cut quality, and helps my mower perform better overall. For me, the best blade is the one that fits perfectly, matches my mowing style, and delivers a clean, reliable cut every time.
Final Thoughts
In my view, choosing the right John Deere LA145 blades makes a big difference in how cleanly and efficiently the mower cuts. I’ve found that keeping the blades sharp, properly sized, and well-maintained helps improve lawn quality and reduces strain on the mower. My key takeaway is that a little attention to blade condition can go a long way toward better mowing results and longer equipment life.
Author Profile
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Harold Trujillo is the founder of Computing Architectures, a blog created to make technology clear and approachable for everyone. Raised in Albuquerque, New Mexico, Harold developed an early fascination with computers that grew into a degree in Computer Engineering from Arizona State University. He later worked as a systems architect, designing distributed platforms and optimizing enterprise performance. Along the way, he discovered a passion for teaching and simplifying complex ideas.
Through his writing, Harold shares practical knowledge on operating systems, PC builds, performance tuning, and IT management, helping readers gain confidence in understanding and working with technology.
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