When it comes to maintaining a pristine yard or tackling overgrown weeds, a string trimmer is a go-to tool for many. But the real magic happens with the trimmer line—the unsung hero that slices through grass, weeds, and even light brush. If you’re in the market for a .105-inch diameter trimmer line, you’re likely looking for something durable enough to handle tougher jobs yet versatile enough for regular yard upkeep. With so many options out there, how do you choose the best one?
In this roundup, I’ve put five top contenders to the test—all .105-inch trimmer lines designed to deliver power and precision. These include the Rotary 14730 Black Vortex Trimmer Line, Oregon .105″ Square String Trimmer Line (69-474), Arnold Trimline Maxi-Edge, Oregon 22-905 Magnum Gatorline Square, and Oregon 20-036 Magnum Gatorline Supertwist. I’ll break down their features, performance, pros, cons, and real-world usability to help you find the perfect match for your trimming needs. Whether you’re a weekend warrior or a landscaping pro, this guide has you covered.
Let’s dive in and explore what makes these .105 trimmer lines stand out—or fall short—in the quest for the ultimate trimming experience.
Contents
- Why .105-Inch Trimmer Line?
- The Contenders: A Quick Overview
- 1. Rotary 14730 Black Vortex Trimmer Line .105″ x 185′
- 2. Oregon .105″ Square String Trimmer Line (69-474), 971 Feet
- 3. Arnold Trimline Maxi-Edge .105-Inch x 165-Foot
- 4. Oregon 22-905 Magnum Gatorline Square .105-Inch, 1/2-Pound Donut
- 5. Oregon 20-036 Magnum Gatorline Supertwist .105-Inch, 5 Pounds
- Head-to-Head Comparison
- How to Choose the Right .105 Trimmer Line for You
- Final Thoughts: The Best .105 String Trimmer Line
Why .105-Inch Trimmer Line?
Before we get into the nitty-gritty of each product, let’s talk about why .105-inch trimmer line matters. Trimmer lines come in various diameters, typically ranging from 0.065 to 0.130 inches. The .105 size sits in the sweet spot for medium to heavy-duty tasks. It’s thicker than lightweight lines (like 0.065 or 0.080 inches), offering more durability and cutting power, but it’s not so bulky that it overwhelms smaller trimmers or slows down your work.
This diameter is ideal for:
- Thicker weeds and tall grass: It slices through dense vegetation without bogging down.
- Edging and precision work: It’s still manageable for clean lines along fences or sidewalks.
- Commercial or frequent use: Its durability means fewer reloads and less downtime.
However, not all .105 lines are created equal. Factors like material quality, shape (round, square, twisted), and flexibility play a huge role in performance. With that in mind, let’s see how our five contenders stack up.
The Contenders: A Quick Overview
Here’s the lineup we’ll be reviewing:
- Rotary 14730 Black Vortex Trimmer Line .105″ x 185′ – A spiral-shaped line promising durability and quiet operation.
- Oregon .105″ Square String Trimmer Line (69-474) – A universal-fit, square-cut line in a massive 971-foot spool for long-lasting use.
- Arnold Trimline Maxi-Edge .105-Inch x 165-Foot – A commercial-grade, star-shaped line designed for tougher jobs.
- Oregon 22-905 Magnum Gatorline Square .105-Inch, 1/2-Pound Donut – A heavy-duty square line with a reinforced core for professional-grade cutting.
- Oregon 20-036 Magnum Gatorline Supertwist .105-Inch, 5 Pounds – A twisted line blending power, efficiency, and reduced noise.
Each of these brings something unique to the table. Let’s break them down one by one, exploring their specs, performance, and whether they live up to the hype.
1. Rotary 14730 Black Vortex Trimmer Line .105″ x 185′
Overview
The Rotary 14730 Black Vortex is a standout with its distinctive spiral (vortex) design. Clocking in at 185 feet on a small spool, it’s marketed as a commercial-grade option that promises exceptional durability and quieter operation compared to traditional round lines. At around $17-$20, it’s a mid-range pick that aims to balance cost and performance.
Key Features
- Diameter: 0.105 inches
- Length: 185 feet
- Shape: Vortex (twisted/spiral)
- Material: High-strength nylon
- Color: Black
Performance
The vortex shape is the star of the show here. Unlike round lines that simply whip through grass, the spiral design is said to reduce air resistance, making it quieter and potentially less taxing on your trimmer’s engine. In practice, this holds true—I noticed a softer hum compared to square or star-shaped lines, which can buzz like an angry beehive.
When tackling thick grass and weeds, the Rotary Black Vortex cuts cleanly and resists snapping better than some round lines I’ve used. It’s not invincible, though. Against fences or rocky edges, it wears down faster than expected, and I experienced occasional breakage at the trimmer head’s eyelets. Some users report it jamming or welding in certain trimmer heads (like speed-feed models), which could be a dealbreaker if your setup isn’t compatible.
Pros
- Quiet operation—great for noise-sensitive areas.
- Solid cutting power for medium-duty tasks.
- Good value for the length and price.
Cons
- Prone to welding or jamming in some trimmer heads.
- Durability falters against hard surfaces like concrete or wire.
- Not the longest-lasting option in heavy brush.
Best For
Homeowners or small-scale landscapers who want a quiet, efficient line for regular yard maintenance. If you’re trimming near neighbors or in urban settings, the reduced noise is a big plus.
Verdict
The Rotary Black Vortex is a solid performer for its price, especially if noise matters to you. It’s not the toughest line on this list, but it gets the job done for most residential tasks. Just make sure your trimmer head plays nice with twisted lines.
2. Oregon .105″ Square String Trimmer Line (69-474), 971 Feet
Overview
Oregon is a titan in the trimmer line world, and the 69-474 Square String Trimmer Line is built for those who want longevity and versatility. With a whopping 971 feet in a 5-pound spool (priced around $50-$60), this green, square-cut line is marketed as an all-purpose, universal-fit option for DIYers and gardeners alike.
Key Features
- Diameter: 0.105 inches
- Length: 971 feet
- Shape: Square
- Material: Durable nylon copolymer
- Color: Green
Performance
Square lines are known for their aggressive cutting power, and this Oregon offering doesn’t disappoint. The four sharp edges slice through thick grass and weeds with ease, leaving a cleaner cut than round lines. I tested it on a mix of overgrown lawn edges and stubborn thistles, and it powered through without hesitation.
The real draw here is the sheer volume—971 feet means fewer trips to the store, making it a cost-effective choice over time. It’s also surprisingly flexible for a square line, reducing breakage against obstacles like fences or stones. That said, it’s not immune to wear, and heavy use on rocky terrain will chew it up faster than a twisted or reinforced line.
Pros
- Massive length for extended use.
- Excellent cutting efficiency thanks to the square shape.
- Universal fit works with most gas trimmers.
Cons
- Can be noisy compared to twisted lines.
- Slightly less durable against hard surfaces.
- Large spool might be overkill for casual users.
Best For
DIY enthusiasts or frequent users who need a reliable, long-lasting line for a variety of tasks. It’s perfect if you’ve got a big property or tackle yard work regularly.
Verdict
The Oregon 69-474 is a workhorse that delivers on value and performance. It’s not the fanciest line, but its simplicity and stamina make it a top pick for anyone who wants to stock up and trim with confidence.
3. Arnold Trimline Maxi-Edge .105-Inch x 165-Foot
Overview
The Arnold Trimline Maxi-Edge takes a commercial-grade approach with its 6-point star shape and 165 feet of red line. Priced at a budget-friendly $15-$20, it’s designed for bigger jobs and claims to cut three times faster than residential lines. If you’re after power on a budget, this one’s worth a look.
Key Features
- Diameter: 0.105 inches
- Length: 165 feet
- Shape: 6-point star
- Material: High-impact nylon
- Color: Red
Performance
The star shape is a game-changer—it’s like giving your trimmer a set of tiny blades. In testing, it ripped through dense weeds and overgrown patches faster than round or even square lines. Arnold’s claim of “three times faster” might be a stretch, but it’s noticeably quicker than lighter-duty options.
Durability is decent for the price, though it’s not as tough as some premium lines. It holds up well against grass and weeds but starts to fray when it hits pavement or metal edging. The universal fit is a plus, and it fed smoothly through my trimmer without jamming—a relief after some finicky lines I’ve tried.
Pros
- Aggressive cutting power from the star shape.
- Affordable price for commercial-grade performance.
- Easy to load and compatible with most trimmers.
Cons
- Wears down quickly on hard surfaces.
- Not as durable as reinforced lines.
- Slightly shorter length than competitors.
Best For
Budget-conscious users who need a strong line for occasional heavy-duty trimming. It’s great for tackling neglected yards or seasonal cleanups.
Verdict
The Arnold Maxi-Edge punches above its weight for the cost. It’s not the longest-lasting, but its cutting speed and affordability make it a smart pick for tougher jobs on a tight budget.
4. Oregon 22-905 Magnum Gatorline Square .105-Inch, 1/2-Pound Donut
Overview
Another Oregon contender, the 22-905 Magnum Gatorline Square, is a heavy-duty option in a compact 1/2-pound donut (about 141 feet). Priced around $15-$18, it’s aimed at professionals and serious DIYers, boasting a high-strength core and square shape for maximum cutting efficiency.
Key Features
- Diameter: 0.105 inches
- Length: 141 feet
- Shape: Square
- Material: Reinforced nylon with high-strength core
- Color: Gray
Performance
The Magnum Gatorline lives up to its name. The reinforced core makes it incredibly tough—I ran it along a chain-link fence and concrete curb, and it held up better than most lines on this list. The square design delivers crisp, clean cuts through thick vegetation, and it’s noticeably resistant to breakage.
At 141 feet, it’s the shortest spool here, but the durability means you won’t burn through it quickly. It’s also quieter than the Oregon 69-474 square line, though not as silent as a twisted design. My only gripe? It can be stiff, which might strain smaller trimmers if they’re not up to the task.
Pros
- Exceptional durability against obstacles.
- Clean, efficient cuts with minimal effort.
- Ideal for professional or heavy use.
Cons
- Shorter length limits value for frequent users.
- Stiffness may challenge lower-powered trimmers.
- Slightly pricier per foot than competitors.
Best For
Professionals or homeowners with demanding trimming needs—like rocky yards or commercial properties. It’s built to last where others falter.
Verdict
The Oregon 22-905 is a premium choice for those who prioritize toughness over quantity. It’s a beast of a line that thrives in harsh conditions, making it a favorite for serious users.
5. Oregon 20-036 Magnum Gatorline Supertwist .105-Inch, 5 Pounds
Overview
Rounding out the list is the Oregon 20-036 Magnum Gatorline Supertwist, a twisted line in a hefty 5-pound spool (around 971 feet). Priced at $60-$70, it combines Oregon’s signature reinforced core with a twisted shape for reduced noise and enhanced cutting efficiency.
Key Features
- Diameter: 0.105 inches
- Length: 971 feet
- Shape: Twisted (Supertwist)
- Material: Reinforced nylon copolymer
- Color: Black
Performance
The Supertwist design is a revelation. It’s quieter than square lines and even edges out the Rotary Vortex in noise reduction, while still delivering powerful cuts through thick grass and weeds. The twisted shape reduces drag, which I felt in the smoother operation of my trimmer—no bogging down, even on dense patches.
Durability is top-notch, thanks to the reinforced core and weld-resistant outer layer. It shrugged off encounters with fences and rocks better than most, and the 971-foot length ensures you’re set for the long haul. It’s not perfect—loading it into some trimmer heads can be tricky due to its rigidity—but the performance payoff is worth it.
Pros
- Outstanding durability and cutting power.
- Reduced noise and engine drag.
- Massive spool for extended use.
Cons
- Stiffer line can be harder to load.
- Higher upfront cost.
- Overkill for light trimming tasks.
Best For
Serious landscapers or homeowners with large properties who want premium performance and longevity. It’s the ultimate all-rounder for heavy-duty trimming.
Verdict
The Oregon 20-036 Supertwist is the gold standard in this roundup. It’s pricey, but its blend of power, durability, and efficiency makes it a worthy investment for anyone who trims often or tackles tough jobs.
Head-to-Head Comparison
Now that we’ve dissected each line, let’s put them side by side across key metrics:
Cutting Power
- Winner: Oregon 20-036 Supertwist – The twisted shape and reinforced core edge out the competition.
- Runner-Up: Arnold Maxi-Edge – The star shape cuts fast, though it lacks the finesse of others.
Durability
- Winner: Oregon 22-905 Magnum Gatorline – Its toughness against obstacles is unmatched.
- Runner-Up: Oregon 20-036 Supertwist – Nearly as durable, with added flexibility.
Noise Level
- Winner: Oregon 20-036 Supertwist – The twisted design keeps things quietest.
- Runner-Up: Rotary Black Vortex – A close second for noise reduction.
Value for Money
- Winner: Oregon 69-474 Square – 971 feet at a reasonable price is hard to beat.
- Runner-Up: Arnold Maxi-Edge – Affordable power for shorter-term needs.
Ease of Use
- Winner: Arnold Maxi-Edge – Universal fit and easy loading make it hassle-free.
- Runner-Up: Oregon 69-474 Square – Simple and compatible with most trimmers.
How to Choose the Right .105 Trimmer Line for You
Picking the best line depends on your specific needs. Here’s a quick guide:
- For Casual Home Use: Go with the Rotary Black Vortex or Arnold Maxi-Edge. They’re affordable and capable for occasional trimming.
- For Frequent DIYers: The Oregon 69-474 Square offers unbeatable value and versatility.
- For Tough Jobs: The Oregon 22-905 Magnum Gatorline is your go-to for durability in harsh conditions.
- For Professionals: The Oregon 20-036 Supertwist combines power, longevity, and efficiency for all-day use.
Consider your trimmer’s power, too. Smaller electric or battery-powered models (under 25cc) might struggle with stiffer lines like the 22-905 or 20-036. Check your manual for max diameter and compatibility.
Final Thoughts: The Best .105 String Trimmer Line
After testing and comparing these five .105 trimmer lines, the Oregon 20-036 Magnum Gatorline Supertwist takes the crown. Its blend of cutting power, durability, and reduced noise makes it the most well-rounded option for serious users. Yes, it’s the priciest, but the 971 feet of top-tier line justifies the cost for those who trim often or face challenging yards.
For budget buyers, the Arnold Trimline Maxi-Edge offers impressive bang for your buck, while the Oregon 69-474 Square is the value king for long-term use. The Rotary Black Vortex shines for quiet operation, and the Oregon 22-905 Magnum Gatorline is a durability champ in smaller doses.
No matter which you choose, a quality .105 trimmer line can transform your yard work from a chore to a triumph. So, grab your trimmer, spool up, and get ready to tame the wild—your perfect line is waiting.
