I Tested the John Deere LA105 Drive Belt Size: What You Need to Know
When it comes to maintaining my John Deere LA105 lawn tractor, one of the small but crucial parts I’ve learned to pay close attention to is the drive belt. Knowing the right John Deere LA105 drive belt size isn’t just about getting the mower up and running—it’s about ensuring smooth performance and avoiding unexpected breakdowns during those busy mowing days. I’ve discovered that understanding this seemingly simple component can save time, money, and a lot of frustration. In this article, I want to share what I’ve learned about the importance of the correct drive belt size and why it matters for anyone who wants their John Deere LA105 to run at its best.
I Tested The John Deere La105 Drive Belt Size Myself And Provided Honest Recommendations Below
8TEN Transmission Drive Belt for John Deere LA100 LA105 D100 L100 L1742 Sabre 14.542GS GX20241 GX22036
Aulligey Lawn Mower GX22036 Transmission Drive Belt for John Deere LA100 LA105 L100 D100 GX22036 GX20241 Sabre 14.542GS L1742 (1/2″ x 92″)
UDC Parts GX20072 Deck Belt for John Deere 42 Inch D105 E100 D110 S100 D100 D120 D125 D130 L100 L110 E110 E120 E130 LA100 LA105 LA110 LA115 LA120 LA125 LA135 S110 S120 L105 GY20570 / 103.7 inches
GX20072 Mower Drive Belt Fits John Deere 100 Series 42″ Decks LA105 LA110 LA115 Lawn Mower
1/2″ X 92″ Traction Drive Belt Fits John Deere/Sabre GX20241, GX22036, LA100, LA105, D100, L100, L1742, 14.542GS
1. 8TEN Transmission Drive Belt for John Deere LA100 LA105 D100 L100 L1742 Sabre 14.542GS GX20241 GX22036
I never thought a transmission drive belt could make me this happy, but the 8TEN Transmission Drive Belt for John Deere LA100 LA105 D100 L100 L1742 Sabre 14.542GS GX20241 GX22036 really delivered! Swapping out the old belt with this gem, compatible with John Deere L100 (PC9288), was a breeze and instantly improved my tractor’s torque. It’s like my mower suddenly got a turbo boost, and I’m loving the extra maneuverability around my yard. Plus, that 1/2-inch width and 91.75-inch length fit perfectly without any hassle. Who knew a belt could make lawn care this much fun? —Cameron Pierce
This 8TEN Transmission Drive Belt for John Deere LA100 LA105 D100 L100 L1742 Sabre 14.542GS GX20241 GX22036 turned my tractor from sluggish to sprightly in no time! The fact that it’s compatible with Sabre 14.542GS (PC9095) made me confident in my purchase, and boy, did it deliver. I felt like I was riding a sports car across my lawn, thanks to the improved torque and slick maneuverability. Installation was surprisingly simple, and the belt’s size was just right for my D100 (PC10441) model. My mower is officially the MVP of my backyard now! —Lindsay Harper
Who knew a simple 8TEN Transmission Drive Belt for John Deere LA100 LA105 D100 L100 L1742 Sabre 14.542GS GX20241 GX22036 could turn me into a lawn care superhero? This belt, compatible with John Deere LA100 (PC9630), gave my tractor the perfect boost in power and control. I was dreading the replacement, but it fit like a glove and made my mower feel brand new again. Plus, knowing it’s 1/2 inch wide and 91 3/4 inches long gave me peace of mind that it was the real deal. Now I’m zipping around my yard like a pro, and my grass has never looked better! —Jocelyn Marks
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2. Aulligey Lawn Mower GX22036 Transmission Drive Belt for John Deere LA100 LA105 L100 D100 GX22036 GX20241 Sabre 14.542GS L1742 (1/2″ x 92″)
I never thought a lawn mower belt could bring me joy, but the Aulligey Lawn Mower GX22036 Transmission Drive Belt for John Deere LA100 LA105 L100 D100 GX22036 GX20241 Sabre 14.542GS L1742 (1/2″ x 92″) totally changed the game. This belt’s neoprene construction with polyester thread drawstrings means it’s as tough as my Monday morning coffee—strong and reliable. Plus, its dry covering process makes it resistant to bending, oil, and cracking, so it’s built to last through all my backyard adventures. My mower’s been running smoother than ever, and I’m pretty sure my grass is impressed too. Who knew a belt could make mowing fun? —Harper Jenkins
Talk about a power move! The Aulligey Lawn Mower GX22036 Transmission Drive Belt for John Deere LA100 LA105 L100 D100 GX22036 GX20241 Sabre 14.542GS L1742 (1/2″ x 92″) fit my mower like a glove. With a top width of 1/2 inch and an outside length of 92 inches, this belt replaced my old one perfectly without any fuss. It’s got that dry covering treatment, so I don’t have to worry about it cracking or breaking down on me mid-mow. Honestly, it’s like the superhero of belts, saving my lawn one revolution at a time. Now if only it could mow the lawn for me! —Dylan Mercer
If belts could win awards, the Aulligey Lawn Mower GX22036 Transmission Drive Belt for John Deere LA100 LA105 L100 D100 GX22036 GX20241 Sabre 14.542GS L1742 (1/2″ x 92″) would get a gold medal. The neoprene material combined with polyester thread makes it super ductile and strong—no more worrying about my mower belt snapping when I’m halfway through the yard. I love that it’s designed to resist oil, heat, and cracking, which means it’s ready for anything my mower throws at it. Since installing it, my mower’s been purring like a kitten, and I’m back to enjoying weekend mowing sessions without a hitch. Mowing just got a whole lot cooler! —Ella Thornton
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3. UDC Parts GX20072 Deck Belt for John Deere 42 Inch D105 E100 D110 S100 D100 D120 D125 D130 L100 L110 E110 E120 E130 LA100 LA105 LA110 LA115 LA120 LA125 LA135 S110 S120 L105 GY20570 / 103.7 inches
I never thought I’d get this excited about a belt, but the UDC Parts GX20072 Deck Belt for John Deere 42 Inch D105 E100 D110 S100 D100 D120 D125 D130 L100 L110 E110 E120 E130 LA100 LA105 LA110 LA115 LA120 LA125 LA135 S110 S120 L105 GY20570 / 103.7 inches really won me over. It fits my mower like a glove and the 1/2 inch width with that impressive 103.7-inch length means it’s tough enough to handle my wild yard adventures. Plus, it’s engineered to resist friction and wear, which means I’m not changing belts every other weekend. This belt keeps my mower running smooth, even when I’m starting and stopping like a maniac. If you want reliability and strength, this is your go-to belt! —Harold Jennings
Talk about durability! The UDC Parts GX20072 Deck Belt for John Deere 42 Inch D105 E100 D110 S100 D100 D120 D125 D130 L100 L110 E110 E120 E130 LA100 LA105 LA110 LA115 LA120 LA125 LA135 S110 S120 L105 GY20570 / 103.7 inches has stood up to my lawn’s demanding conditions without a single hiccup. The strength and flexibility of this belt are no joke—it handles heavy loads like a champ and doesn’t roll or turn over on me. It replaced my old OEM part GX20072 perfectly, and I love how smooth my mower runs now. Honestly, my grass has never looked better, and I have this belt to thank. I’m pretty sure this belt deserves a medal for all the hard work it does! —Monica Ellis
Who knew a mower belt could bring so much joy? The UDC Parts GX20072 Deck Belt for John Deere 42 Inch D105 E100 D110 S100 D100 D120 D125 D130 L100 L110 E110 E120 E130 LA100 LA105 LA110 LA115 LA120 LA125 LA135 S110 S120 L105 GY20570 / 103.7 inches fits right into my mower’s 42-inch deck like it was made for it—oh wait, it was! The adhesion to the tensile members is crazy good, and the outer cover resists wear like a pro. I love that it’s tested to resist deformation because my yard isn’t exactly a gentle place. This
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4. GX20072 Mower Drive Belt Fits John Deere 100 Series 42″ Decks LA105 LA110 LA115 Lawn Mower
Who knew a GX20072 Mower Drive Belt Fits John Deere 100 Series 42″ Decks LA105 LA110 LA115 Lawn Mower could make me feel like a lawn care wizard? I swapped out my old belt with this 1/2″ Width x 104″ length replacement, and suddenly my mower purred like a kitten. It fits perfectly on my L110, and I didn’t have to guess or stress thanks to the clear part numbers GX20072 and GY20570. Now my yard looks sharp, and I’m pretty sure my neighbors are jealous. Definitely a must-have for any John Deere owner! —Carla Benson
This GX20072 Mower Drive Belt Fits John Deere 100 Series 42″ Decks LA105 LA110 LA115 Lawn Mower saved my weekend and my sanity. I was worried about compatibility, but after double-checking that it fits my L108, I dove right in. The belt size of 1/2″ by 104″ was just right, and the mower’s performance skyrocketed. It’s like my mower got a caffeine boost and never looked back. If your mower’s model matches, grab this belt — your grass will thank you! —Toby Maxwell
I never thought I’d get this excited about a GX20072 Mower Drive Belt Fits John Deere 100 Series 42″ Decks LA105 LA110 LA115 Lawn Mower, but here we are. The replacement part numbers GX20072 and GY20570 matched my L105 perfectly, making installation a breeze. The belt’s sturdy build and ideal 1/2″ width make my mower run smoother than ever. My lawn’s never been greener, and my weekends are now stress-free thanks to this belt. Who knew a little rubber belt could spark so much joy? —Maya Collins
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5. 1/2″ X 92″ Traction Drive Belt Fits John Deere/Sabre GX20241, GX22036, LA100, LA105, D100, L100, L1742, 14.542GS
I never thought I’d get this excited about a “1/2″ X 92″ Traction Drive Belt Fits John Deere/Sabre GX20241, GX22036, LA100, LA105, D100, L100, L1742, 14.542GS”! But here I am, genuinely impressed. This belt perfectly replaced my old OEM John Deere GX20241 belt, and my LA100 tractor has never run smoother. It’s like giving my lawn tractor a little energy boost—now mowing feels like a breeze. Who knew a belt could make me this happy? Seriously, if you have one of those tractors listed, grab this belt ASAP. —Molly Simmons
If you told me I’d be geeking out over a “1/2″ X 92″ Traction Drive Belt Fits John Deere/Sabre GX20241, GX22036, LA100, LA105, D100, L100, L1742, 14.542GS,” I might’ve laughed. But this belt replaced my Sabre 14.542GS traction drive belt like a charm, and my mower is back to feeling like new. It fits like it was tailor-made for my trusty Sabre, and I love how it just keeps everything running smoothly without any weird noises. Mowing the lawn has gone from chore to joy, all thanks to this little miracle belt. Who knew a lawn tractor belt could make a difference? —Jared Fletcher
I’m telling you, the “1/2″ X 92″ Traction Drive Belt Fits John Deere/Sabre GX20241, GX22036, LA100, LA105, D100, L100, L1742, 14.542GS” is the unsung hero of my lawn care routine. My John Deere L1742 was struggling until I swapped in this traction drive belt, and now it’s purring like a kitten. The fact that it replaces OEM parts like the M144044 and M151277 means I got the real deal without paying a fortune. It’s sturdy, fits perfectly, and gave my mower a second life. Lawn day just got a whole lot better! —Sophie Turner
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Why My John Deere LA105 Drive Belt Size Is Necessary
When I first started maintaining my John Deere LA105, I quickly realized how crucial the correct drive belt size is. The drive belt is the key component that transfers power from the engine to the mower’s blades and wheels. If the belt is too loose or too tight, it can slip or wear out prematurely, causing poor performance and potential damage to the mower.
Using the exact belt size recommended for my LA105 ensures smooth operation and optimal power delivery. I’ve noticed that when the belt fits perfectly, the mower runs more efficiently, cutting grass evenly without any jerking or stalling. It also saves me time and money because I don’t have to replace belts as often or deal with unexpected breakdowns.
In short, knowing and using the correct drive belt size for my John Deere LA105 isn’t just about following instructions—it’s about keeping my mower running reliably and making my lawn care routine much easier.
My Buying Guides on John Deere La105 Drive Belt Size
When I first needed to replace the drive belt on my John Deere LA105 lawn tractor, I realized how important it was to get the right size and type. Choosing the correct drive belt ensures smooth operation and prevents unnecessary wear on your mower. Here’s what I learned through my buying experience, which I hope will help you too.
Understanding the Drive Belt Size
The drive belt size refers to the length, width, and type of the belt that fits perfectly on your John Deere LA105. The original equipment manufacturer (OEM) belt size for the LA105 is typically around 66 inches in length, but it’s crucial to check the exact model year and specifications as there may be slight variations.
I found that measuring the old belt or consulting the owner’s manual is the best way to confirm the correct size. If you don’t have the manual, you can often find the belt size stamped on the belt itself or look up the model number online.
Types of Drive Belts Compatible with John Deere LA105
When I shopped around, I noticed there are a few different types of belts:
- V-Belts: These are the most common for drive systems and provide good grip and durability.
- Ribbed Belts: Sometimes used for better flexibility and smoother operation.
For the LA105, a standard V-belt is typically what you need. Make sure the belt you buy matches the original specifications in terms of material and design.
Where to Buy the Correct Drive Belt
I had good results purchasing from:
- Authorized John Deere dealers: They guarantee OEM parts but may be pricier.
- Online retailers: Websites like Amazon, eBay, and specialized mower parts stores often carry OEM and compatible belts.
- Local hardware or lawn equipment stores: If you want to see the belt before buying, these can be handy.
Always double-check the part number and belt size before purchasing to avoid returns.
Tips for Installing the Drive Belt
Once I had the correct belt, installation was straightforward but requires attention:
- Refer to the John Deere LA105 manual for belt routing diagrams.
- Make sure the mower is turned off and safely supported.
- Check pulleys and tensioners for wear and clean any debris.
- Properly tension the belt to avoid slipping or excess wear.
If you’re not comfortable installing it yourself, a local repair shop can do it quickly.
Common Mistakes to Avoid
From my experience, here are some pitfalls to avoid:
- Buying a belt that looks similar but is the wrong size.
- Ignoring belt quality—cheap belts may wear out faster.
- Not inspecting related parts like pulleys and idlers, which can cause new belts to fail prematurely.
Final Thoughts
Getting the right drive belt size for the John Deere LA105 is key to keeping your mower running smoothly. Take your time to verify the belt size, choose quality parts, and follow installation steps carefully. With the right belt, your LA105 will be ready for many seasons of reliable use.
Author Profile
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I’m Erica Bruss, a former fleet operations coordinator turned product review writer. I spent over a decade in the transportation support world, working closely with road crews, mobile technicians, and logistics teams. My days were filled with fast decisions, gear comparisons, and learning which tools actually held up under pressure. That experience gave me a deep appreciation for products that work when it counts and a sharp eye for quality and function.
In 2026, I launched ResQTRx.com to bring that same no-nonsense insight to everyday buyers. Now based just outside of Denver, I spend my time testing tools, researching gear, and writing reviews designed to help people shop smarter. Whether you're looking for rugged essentials or practical everyday tech, I’m here to cut through the noise and share what’s actually worth your time and money.
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