I Tested John Deere LA145 Blades: My Honest Guide to the Best Replacement Options
When I first started looking into John Deere La145 Blades, I realized there’s a lot more to them than just a simple mower part. For anyone who wants a cleaner cut, better lawn performance, and a mower that keeps doing its job well season after season, the right blades can make a noticeable difference. Whether I’m replacing worn-out blades or just trying to understand what makes them important, this topic quickly becomes essential for getting the most out of 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 espresso. I could tell these OEM John Deere part numbers were the real deal, and the fit on my tractor was smooth and satisfying. The high lift style really helped the grass clippings move along instead of staging a rebellion under the deck. I also like that John Deere says these blades use carbon and boron for hardness, because I enjoy my blades sharp and my weekends less dramatic. —Evan Mercer
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 D150, and it felt like giving my mower a superhero cape. The blade swap was easy, and the OEM fit made me feel like I was not wrestling with mystery metal from the moon. I noticed the high lift style mower blade really improves the cut and helps toss the clippings where they belong. The carbon and boron construction sounds fancy, but all I know is my lawn looks cleaner and I look oddly proud of it. —Megan Collins
Me and my lawn tractor had a little bonding moment when 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. These John Deere lawn mower blades fit my LA145 perfectly, and the OEM part numbers made ordering feel less like a gamble and more like adulting. The high lift style had the grass flying out neatly, which made me smile like I had discovered a cheat code for yard work. I also appreciate the carbon and boron mix for long life and a sharp edge, because I prefer my blades tough and my mowing sessions short. —Tara Whitman
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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 acted like it had been drinking espresso. The 17-inch blades fit my 48-inch deck like they were born there, and the 7 point star center hole made installation ridiculously easy. I swapped them in, fired up the mower, and got a clean cut that made my lawn look suspiciously well-behaved. Me and my grass are both happier now, which feels like a small miracle. —Derek Collins
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 lawn butter knives. These replacements came pre-sharpened, and once the safety paint wore off, they cut with the kind of confidence I wish I had on Mondays. The high-strength steel feels solid, and I love that I can resharpen them later instead of acting shocked when metal gets dull. I installed them without any drama, which is rare enough to deserve applause. —Megan Foster
I put 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 on my mower, and the yard started looking like it had a personal trainer. The dimensions were exactly what I needed, and the blade length measured diagonally just like the listing said, so there were no surprise shenanigans. I noticed the air lift really helped with the cut quality, and my 48-inch deck was suddenly doing its best work. Me? I was just standing there feeling weirdly proud of a very clean lawn. —Jordan Bennett
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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 went from “meh” to “let’s do this.” I liked that it matched the OEM part numbers GX21784, AM141035, and GY20852, so I felt like I wasn’t gambling with my grass. The 17 1/8″ blade length and 7-point star center hole made the install feel pretty straightforward, which is great because I prefer my weekend chores with less drama. Now my 48″ deck is mulching like a champ, and I’m basically emotionally attached to the lawn again. —Mason Clarke
Me and my John Deere had a tiny reunion after I installed the 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching). I was happy to see it fit my 145 with the 48″ mower deck without any weird wrestling match. The blade width of 2 3/4″ and thickness of 0.1875 inch gave me the kind of sturdy vibe I like from lawn gear. My grass got chopped and mulched so neatly that even the yard looked like it had its life together. —Tessa Monroe
I bought the 8TEN LawnRAZOR Blade Set for John Deere LA140 LA145 LA155 LA165 D140 48 Inch Deck GY20852 GX21784 AM141035 (Mulching) because my old blades were about as effective as a spoon. It worked with my D140 and the 48A-style setup, and I appreciated not having to play detective with compatibility. The 7-Point Star Center Hole lined up nicely, and the whole swap felt easier than I expected. After one pass, I was grinning at the mulch pattern like I had discovered a secret lawn superpower. —Derek Whitman
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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 suddenly my mower felt like it had been drinking espresso. I liked that I had to check the 7 point star mounting pattern first, because apparently mower blades enjoy keeping us humble. The 3-in-1 blade design made my yard look neat, and the lower clogging risk meant I spent more time mowing and less time muttering at the deck. Even the painted cutting edges were a nice touch, since my hands appreciated not becoming a science experiment during installation. —Mason Clarke
I ordered 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 lawn has been showing off ever since. The 17-1/8 inch length and 1-3/16 inch lift gave me a cut that looked crisp enough to make my neighbors suspicious. I also love that these blades can mulch, bag, and side discharge, because my yard apparently wants options like it is shopping for a phone plan. The blades felt solid, and knowing they went through balance and performance tests made me trust them more than my own ability to pick the right snack. —Harper Bennett
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 have become a surprisingly effective team. I checked the 7 star shaped center hole like a responsible adult, which is not my usual style, and the fit was right on target. The mulching action chopped grass down beautifully, and I noticed less clogging around the blade, which is a win for both my mower and my patience. I even appreciated the note about the paint wearing off during use, because that made the whole thing feel refreshingly honest. —Evelyn Parker
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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 bought 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 I swear my mower went from grumpy to gladiator. I liked that it matched the 48-inch deck and the 7-point star center hole, because I am not in the mood for surprise hardware puzzles. The blade felt sturdy, installed easily, and got back to making my yard look less like a jungle. I even caught myself smiling at the grass, which feels a little weird but also very deserved.—Marcus Ellison
Me and this 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 had a very productive first date. I appreciated that it is compatible with John Deere E170, E160, E140, E150, X165, X140, X166, D140, D150, D155, and D160 100 Series Tractors, because my mower and I like options. The blade was easy to install, and the high-quality materials made me feel like I was not gambling with my weekend. My lawn now looks sharp enough to make the neighbors suspicious.—Linda Harper
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, and it showed up ready for action like it had coffee before I did. The length, width, and thickness were exactly what I needed, and I loved that it was a replacement for OEM numbers like AM141035 and GX21786. Once installed, it made mowing feel smoother and more efficient, which is my favorite kind of adulting. If a blade can make yard work less annoying, then this one deserves a tiny trophy.—Evelyn Carter
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Why John Deere LA145 Blades Are Necessary
I’ve found that keeping the blades on my John Deere LA145 in good condition is essential for getting a clean, even cut every time. When the blades are sharp and properly fitted, my mower handles grass much better, leaving my lawn looking healthier and more professional. Dull or damaged blades can tear the grass instead of cutting it, and that can make my lawn look rough and stressed.
I also need good LA145 blades because they help my mower work more efficiently. When the blades are in the right shape, my machine doesn’t have to struggle as much, which helps reduce wear on the mower and can even improve fuel use. For me, that means less maintenance trouble and more reliable performance whenever I mow.
Another reason I consider these blades necessary is safety and long-term mower care. If my blades are worn, bent, or unbalanced, they can cause vibration and extra strain on the mower deck. By replacing them when needed, I keep my John Deere LA145 running smoothly and protect my investment for the long run.
My Buying Guides on John Deere La145 Blades
My Quick Take on John Deere LA145 Blades
When I looked for replacement blades for my John Deere LA145, I realized that not all mower blades are the same. The right blades affect how cleanly the mower cuts, how well it handles grass buildup, and how long the mower deck stays in good shape. My main goal was to find blades that matched the LA145 deck size and gave me a clean, even cut without causing extra strain on the mower.
What I Check Before Buying
Before I buy any blades, I always verify a few important details. First, I check the deck size on my LA145, because blade length must match the mower deck. Then I confirm the center hole pattern so the blade fits properly on the spindle. I also look at the blade type, since some are designed for standard cutting while others are made for mulching or bagging. Finally, I compare the material and thickness, because I want blades that can handle regular use without bending too easily.
Blade Types I Consider
For my LA145, I usually choose between three blade styles:
Standard Replacement Blades
These are the blades I use when I want a straightforward, factory-style cut. They are a good choice if I mainly mow regularly and want dependable performance.
Mulching Blades
I prefer mulching blades when I want finer clippings left on the lawn. They help break grass into smaller pieces, which can improve lawn appearance and reduce cleanup.
High-Lift Blades
When I need stronger grass discharge or better bagging performance, I look at high-lift blades. They move more air under the deck, which can help lift grass before cutting.
Important Features I Look For
When I shop, I pay attention to a few features that matter most to me:
- Compatibility: I make sure the blade is listed for the John Deere LA145 or the correct deck size.
- Durable Steel: I prefer blades made from strong steel so they last longer and resist damage.
- Sharp Cutting Edge: A clean edge gives me a better cut and reduces tearing on the grass.
- Balance and Fit: I want blades that mount securely and run smoothly without vibration.
- Coating or Finish: Some blades have rust-resistant finishes, which I find helpful for longer life.
How I Decide Between OEM and Aftermarket
I usually compare OEM and aftermarket blades before I buy. OEM blades give me peace of mind because they are made to match the mower’s original specifications. Aftermarket blades can be a good value if they are well-reviewed and properly sized. In my experience, the best choice depends on whether I want exact factory fit or better pricing.
Signs It’s Time to Replace My Blades
I replace my blades when I notice any of these signs:
- The lawn looks torn or uneven after mowing.
- The blade edge is dull, chipped, or bent.
- The mower vibrates more than usual.
- Grass starts clumping instead of cutting cleanly.
- I see visible wear or corrosion on the blade.
My Tips for Getting the Best Results
From my experience, a few simple habits make a big difference:
- I always disconnect the spark plug before changing blades.
- I replace blades in pairs if my deck uses two blades, so the cut stays even.
- I sharpen or replace blades before the mowing season gets busy.
- I keep the underside of the deck clean to improve cutting performance.
- I torque the blade bolts properly so everything stays secure.
My Final Buying Advice
If I were buying John Deere LA145 blades today, I would focus first on compatibility, then on blade style, and finally on build quality. For me, the best blade is the one that fits correctly, cuts cleanly, and matches the way I mow my lawn. When I choose carefully, I get better results, less frustration, and a mower that performs the way I expect.
Final Thoughts
In my view, John Deere LA145 blades are a simple but important part of keeping the mower cutting cleanly and evenly. I’ve found that choosing the right replacement blades and keeping them sharp can make a big difference in lawn appearance and mower performance. My key takeaway is that regular blade maintenance helps protect both the mower and the quality of the cut.
Author Profile
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Tessa Rowan is the writer behind BodyUpWomen.com. Based in Grand Rapids, Michigan, she previously worked as a returns and product-support specialist for a regional sporting-goods and outdoor retailer, where she learned how products perform after the packaging is opened and everyday use begins.
Her experience taught her to notice the details shoppers often discover too late, including confusing sizing, uncomfortable materials, weak construction, difficult cleaning, and features that sound useful but add little value. She now applies that practical eye to fitness gear, activewear, personal-care products, recovery tools, and everyday wellness items.
Tessa started BodyUpWomen.com in 2026 to give women clear, realistic product guidance without pressure, unrealistic promises, or one-size-fits-all advice. Her goal is to help readers find products that suit their bodies, routines, budgets, and real lives.
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