The Best Weed Eater Strings for Trimmers

You’ll get maximum performance from your string trimmer and a great-looking landscape when you use the right kind of string in your machine. and its partners may earn a commission if you purchase a product through one of our links.

The Best Weed Eater String Option


The string you use in your weed eater can have a big impact on your weekly yard work. Using the wrong product is a recipe for frustration. The string constantly breaks or sticks inside the spool housing, forcing you to stop and reload frequently. The cut looks rough and uneven, and reloading the spool is a struggle. The right kind of trimmer string will last a long time without needing to be replaced. It will trim cleanly and easily. Best of all, when the time comes to reload the string, it will be quick and simple.

This guide covers expert shopping advice on finding the best weed eater string to meet your needs, as well as a compilation of the top-rated trimmer strings on the market.

  1. BEST OVERALL: Cyclone Commercial Grade Grass Trimmer Line
  2. RUNNER-UP: Maxpower Residential Grade Trimmer Line
  3. ALSO CONSIDER: Oregon Magnum Gatorline Square String Trimmer Line
  4. ALSO CONSIDER: Husqvarna Titanium Force String Trimmer Lines
The Best Weed Eater String Option


What to Look for When Buying Weed Eater String

The first thing you should do before buying string for your trimmer is to consult your owner’s manual or the manufacturer’s website for the string sizes that will fit your machine. With that information in hand, there are five aspects of trimmer string to consider while you shop: shape, durability, material, weld resistance, and line size.


Trimmer string comes in round, multi-sided, and twisted shapes. The shape of the line affects performance in several ways, including cleanness of the cut, durability of the string, and even noise level. It is important to match the string shape with the conditions under which it will be used.

  • Round string comes in all sizes. It is economical, durable, and easy to reload. A round string is best for lawns with mostly grass and just a few weeds. It is not as efficient on weedy properties because the smooth edges tend to tear through weeds rather than cutting cleanly. A round string is also more likely to overheat and weld together when trimming along concrete walls or fences.
  • Multi-sided string is best for yards with heavy weeds and thick grass. The sharp edges cut through weeds for a cleaner look. It breaks more easily than round string while trimming along hard surfaces, so it may not be the best choice where there are lots of obstacles to work around.
  • Twisted string provides a cleaner cut than a round string in thick weeds, and has comparable durability around hard surfaces. Its reduced air resistance makes it operate with less noise and vibration than other string shapes. Combined with an electric or cordless trimmer, twisted string can be a great choice where noise is a concern.


Consistent use among heavy weeds and hard surfaces is where the difference in durability really shows up. A more durable string allows you to do more work per spool. Trimmer string durability varies based on the material it is made of, the shape of the string, the material being trimmed, and friction with fixed surfaces like stone or concrete. Given the same shape and material, the thicker the string is, the more durable it will be.

For the greatest durability, a round string is the standard. It contains more material with less surface area, so it has a longer wear time. Round string made of reinforced nylon or non-nylon polymer, or string with a hardened core material will show greater durability than basic nylon.


Basic trimmer string is made of hardened monofilament nylon. For years this has been the industry standard, but manufacturers are making constant improvements to increase durability and capability. Plain nylon line is still effective, but stronger materials are now available.

Better materials increase cutting power and efficiency. Reinforced composite nylon has a greater degree of resistance to breakage. Some products include strengthening materials like aluminum that are impregnated into the nylon. Other trimmer strings are made from non-nylon polymers or copolymers for increased durability. Some trimmer string is made with a hardened core material to prevent breakage.

Welding Resistance

Welding occurs when trimmer string overheats and sticks together on the spool. It is caused by operating the trimmer at high speed while cutting along a resistant surface like a fence or concrete sidewalk for an extended time. The added friction causes excessive heat buildup, which softens the string and eventually causes it to stick together. A welded line does not feed out of the spool, so you’ll have to remove it and restring the spool.

While the materials used to make trimmer string are all reasonably weld resistant, some types of string have a higher degree of resistance than others. Given the same material, shaped line is more weld-resistant than round because of the increased surface area. Round string has the least amount of surface area, allowing heat buildup to occur more quickly.

Line Size

Line diameter is a good indicator of durability. Given the same material and shape, a thicker line lasts longer. Thicker line also costs more. Consider your cutting conditions, how often you want to reload, and how much you want to spend when deciding on the right line thickness. Not all sizes fit all trimmers, so be sure to read the manufacturer’s directions before purchasing string for your trimmer.

Light-duty weed eater string of .065 to .085-inch diameter is good for small and medium yards with few weeds. Medium-duty trimmer string of .085 to .110-inch diameter is a good choice for larger yards and yards with thick grass and more weeds. Heavy-duty string greater than .110-inch in diameter is best for large properties with heavy weeds including woody plants, lots of fences, and edging.

Our Top Picks

The Best Weed Eater String Option: Cyclone .095-Inch, 6-Blade Trimmer Line 3-Pound Spool


BEST OVERALL: Cyclone Commercial Grade Grass Trimmer Line

Cyclone Commercial Grade Grass Trimmer Line can confidently accomplish any trimming task. Featuring a copolymer formulation, it offers increased strength and abrasion resistance compared with old-fashioned nylon string—so it lasts all day long. The nearly round shape provides plenty of durability to hold up against abrasion while edging curbs and fence lines.

The six edges along the length of the string provide maximum cutting efficiency for tall thick grass, heavy weeds, and even woody seedlings and vines. And the edges help dissipate heat, virtually eliminating welding. Whether you have a small lot in town or a few acres in the country, Cyclone Commercial Grade Grass Trimmer Line is a great choice.

The Best Weed Eater String Option: Maxpower 333695 Residential Round .095-Inch Line


RUNNER-UP: Maxpower Residential Grade Trimmer Line

If you like to save money by buying in bulk, you won’t be disappointed in Maxpower’s .095-inch round trimmer line. This big 855-foot roll will reload your trimmer 42 times, and at only $31.76 per roll, you’re only paying $0.76 per refill!

But this is no cheap product—it’s a great value for a tough nylon monofilament line. Although it tears through dense, heavy vegetation, it also does a solid job trimming grass and minor weeds. Plus, it offers great abrasion resistance and tensile strength while trimming around concrete walls, curbs, and stone.

The Best Weed Eater String Option: Oregon 22-855 Heavy-Duty Magnum Gatorline Square String Line


ALSO CONSIDER: Oregon 22-855 Heavy-Duty Magnum Gatorline Square Line

This pick is for serious yard work. Oregon Magnum Gatorline Square String Trimmer Line offers high cutting efficiency for cleaner, straighter cuts with less effort. It is super durable, with a high-strength inner core that resists breakage, meaning you’ll spend more time trimming and less time winding spools. The square profile slices through vegetation with a clean, even pass.

This string is outstanding for trimming large properties, heavy vegetation, and underbrush, or cleaning up the vegetable garden at the end of the season. Not every trimmer can handle the large .155-inch diameter of the string, so be sure to check your owner’s manual before buying. For big jobs and big trimmers, this is your product.

The Best Weed Eater String Option: Husqvarna Titanium Force Trimmer Line, .095-Inch


ALSO CONSIDER: Husqvarna Titanium Force String Trimmer Lines

A steel-bladed edger is the best choice to set the initial landscape edges along curbs, walkways, and bedlines. Afterward, the edge is easy to maintain with a string trimmer. This trimmer string is made of a commercial-grade copolymer material for longer life and better performance. It receives high marks for durability, longevity, and value.

The combination of superior abrasion-resistant material and the ideal round shape allows Husqvarna Titanium Force String Trimmer Lines to hold up well while working around concrete and stone. This grooved string has fast acceleration and level flight, allowing for reduced fuel consumption and quieter operation. If you have lots of edging to do, this string will help you get the job done quickly and efficiently. This package also includes a convenient line-cutting tool.

FAQs About Your New Weed Eater String

Now that you have more information than you ever thought you’d need about weed eater string, and our top product picks, the only thing left is to make your choice. Before you do, here are a few helpful answers to common questions that will help you get you up and running with your new trimmer string.

Q. How do I install a new weed eater string?

Some string trimmers require pre-cut lengths of line. Others use either one or two long lengths of line that wind onto a spool. You may need to remove the spool from the housing, or you may need to load it in place. Refer to your owner’s manual or the manufacturer’s website for detailed instructions for your specific trimmer brand and model.

Q. Which way should I wind the weed eater string?

Wind the string in the opposite direction of its rotation. In most cases, it should be wound counterclockwise. Many trimmer manufacturers imprint an arrow on the spool to show the proper direction to wind the string.

Q. How often do I have to replace the weed eater string?

As long as it is feeding properly and in good working order, you only need to replace the string when it runs out. Old string or string that has been exposed to the elements for an extended period can become brittle, and may need to be replaced.