7 Best Replacement String Trimmer Heads of 2020

Last update: May 27, 2020

When shopping for the best replacement string trimmer heads, there are a tone of features to consider: Electric power or gas power, straight shafts or curved shafts, and more. In this post, we’ll walk you through everything needed to find out the right one for you.

Here are the best replacement string trimmer heads you can buy in 2020:

  • Best Overall: Husqvarna 966674401 T25
  • Best For Quick Reloading: Echo 99944200907 Speed-Feed 400
  • Best For Line Protection: MaxPower PivoTrim Universal Replacement 3317233
  • Most Durable: WW EZ Lock Head
  • Best Overall: EGO Power+ AH1500 ST1500F/ST1500SF
  • Easy-To-Use: Husqvarna 537388101 Universal T35
  • Best For Quick Reloading: Echo 78890-21001E
Top 7 Best Replacement String Trimmer Heads
Best Overall
Husqvarna 966674401 T25
    Read Our Review
    Best For Quick Reloading
    Echo 99944200907 Speed-Feed 400
      Read Our Review
      Best For Line Protection
      MaxPower PivoTrim Universal Replacement 3317233
        Read Our Review
        Most Durable
        WW EZ Lock Head
          Read Our Review
          Best Overall
          EGO Power+ AH1500 ST1500F/ST1500SF
            Read Our Review
            Easy-To-Use
            Husqvarna 537388101 Universal T35
              Read Our Review
              Best For Quick Reloading
              Echo 78890-21001E
                Read Our Review

                Best For Curved-Shaft Trimmers

                Best Overall: Husqvarna 966674401 T25

                Husqvarna 966674401 T25
                Husqvarna 966674401 T25
                9.4Outstanding
                Pros
                • Securely and easy to use – feature an easy-to-reload spool with two key slots
                • Avoid guesswork – have arrows
                • Avoid line welding and tangling effectively – a split spool design
                Cons
                • A bit expensive

                We choose this Husqvarna string trimmer head over the T35 because, in comparison, this version is much smaller, lighter, and doesn’t take as much line. The price, on the other hand, is much cheaper.

                The spool comes off with a cap for easy reloading while reducing the demand of turning the trimmer upside down to reload the line.

                It features two key slots to put the cap back on the trimmer head while locking it in to avoid unwrapping. Besides, the added arrows prevent guesswork by showing the exact directional winding of the line, and the split design eliminates line welding and tangling.

                Husqvarna 966674401 T25 Specifications

                Dimension

                11.5 x 6 x 3 inches

                Trimmer Head Diameter

                0.065-inch, 0.080-inch or 0.095-inch

                Capacity

                13 feet

                Highlight Features

                Two key slots

                Feature arrows & a split design

                Feature an easy to reload spool that comes off with the cap

                Verdict

                You’ll always want to have these 966674401 T25 string trimmer heads in stock if owning a Husqvarna weed trimmer on the garage.

                Best For Quick Reloading: Echo 99944200907 Speed-Feed 400

                Echo 99944200907 Speed-Feed 400
                Echo 99944200907 Speed-Feed 400
                8.6Great
                Pros
                • Make reloading so fast and simple - can restring 12-15 feet of line on it in seconds
                • Versatile - can restring 12-15 feet of line on it in seconds
                • Simple to get more length – the head can work like a push button to activate its feed string
                • Deliver even cuts
                Cons
                • Useless instructions
                • The side latches can pop open occasionally

                The Echo 99944200907 Speed-Feed 400 is a speed feed head that can restring 12-15 feet of line on it in seconds to make reloading so simple. No tools needed!

                It can restring 12-15 feet of line on it in seconds so most likely it fits any models of grass trimmers and works flawlessly on the job.

                One of the greatest things about this unit is it really allows you to achieve an even cut by resting its head on the ground. Besides, this head can work as a push button to activate its feed string, which makes it a lot simpler to tap and get more length.

                Echo 99944200907 Speed-Feed 400 Specifications

                Dimension

                3.6 x 5.8 x 9.9 inches

                Trimmer Head Diameter

                .095 inch

                Capacity

                16 - 20 feet.

                Highlight Features

                Restring 12-15 feet of line on it in seconds

                A variety of adapters

                Verdict

                If you have a fair amount of features, posts, and trees that needed trimming to keep your lawn looking good, this string trimmer head, known for its quick reloading, is a perfect choice.

                Best For Line Protection: MaxPower PivoTrim Universal Replacement 3317233

                MaxPower PivoTrim Universal Replacement 3317233
                MaxPower PivoTrim Universal Replacement 3317233
                8.4Good
                Pros
                • Protect the line against damage – the pivots and strings are on the top & cuts with 6 pivoting lines
                • High value – includes a premium pre-cut trimmer line
                Cons
                • Seem to wear out fast
                • Not clear instructions

                Compare to stock bump heads, the MaxPower PivoTrim Universal Replacement 3317233 is much easier, lighter, and smaller to spin.

                The pivots and strings are supposed to be on top for extra protection against damage.

                It cuts tall weeds and grass cleanly and quickly. Much more effortless to use around fences than the steel brush blades.

                As long as you don’t grind it into the rocks, the two strings can last about two trimmings around the yard. Besides, there’s no more winding of the string onto the spindle head anymore.

                MaxPower PivoTrim Universal Replacement 3317233 Specifications

                Dimension

                1.25" L x 7.5" W x 4" H

                Trimmer Head Diameter

                0.080" and 0.095"

                Highlight Features

                Cuts with 6 pivoting lines

                Premium pre-cut trimmer line included

                Fits most trimmer models

                Verdict

                For those people who are in need of the best replacement string trimmer head for line protection, this is best.

                Most Durable: WW EZ Lock Head

                WW EZ Lock Head
                WW EZ Lock Head
                8.6Great
                Pros
                • Ultra-durable – rugged construction & premium materials
                • Versatile – fit 0.080” and 0.105” line & compatible with most brands of cordless and gas string trimmer
                Cons
                • Require taking off gloves (if you’re wearing them) to feed the line in

                With the WW EZ Lock Head, you can rest assured to use it on any grass and weed eating tasks, from edging to trimming, all thanks to its decently rugged construction and premium materials.

                It is built to pair with either 0.080” or 0.105” line while the universal fit allows it to be compatible with most brands of the cordless and gas string trimmer.

                For installation, you can take advantage of one of the provided adapter hardware and nuts then remove the old head and thread on it. This helps prevent annoying spools and retain pre-cut line strips with no need to open the head, which saves lots of frustration and time.

                WW EZ Lock Head Specifications

                Dimension

                6.5 x 3.5 x 10.1 inches

                Trimmer Head Diameter

                .080 inch to .105 inch

                Highlight Features

                Rugged construction

                High-quality materials

                UNIVERSAL FIT

                Verdict

                Constructed with rugged, high-quality materials and sturdy design, the WW EZ Lock Head stands out from the rest by its phenomenal durability.

                Best For Straight-Shaft Trimmers

                Best Overall: EGO Power+ AH1500 ST1500F/ST1500SF

                EGO Power+ AH1500 ST1500F/ST1500SF
                EGO Power+ AH1500 ST1500F/ST1500SF
                9Outstanding
                Pros
                • Superbly easy to load the line – improve from the original versions
                • Simple to install
                Cons
                • Use batteries a lot faster

                We’d never liked EGO string trimmer heads until this upgraded version came out. Why? Because this solves the dead problem with their original trimmers which takes no under than 3 hands to load the line.

                This version reloads the trimmer line very fast and easily without dissembling the components. Besides, we also find no issues with installation or hit.

                It is designed to fit the older-style EGO trimmers, which is so convenient and versatile.

                All-in-all, this trimmer head is a good value for the money.

                EGO Power+ AH1500 ST1500F/ST1500SF Specifications

                Dimension

                4.3 x 4.3 x 2.8 inches

                Trimmer Head Diameter

                0. 095 in.

                Capacity

                16 ft.

                Highlight Features

                Genuine EGO parts

                Rewound with 16 ft. Professional Grade 0. 095 in. Twisted Line

                Rapid-Reload system

                Verdict

                The EGO Power+ AH1500 ST1500F/ST1500SF is an awesome replacement string trimmer head and maintains its podium for its brilliant upgrade and effective performance.

                Easy-To-Use: Husqvarna 537388101 Universal T35

                Husqvarna 537388101 Universal T35
                Husqvarna 537388101 Universal T35
                9Outstanding
                Pros
                • High versatility – include a wide range of adapters
                • User-friendly and safe – auto-feeding whenever the head is pushed into the ground
                • Easy to install
                Cons
                • Wish the amount and sizes of the line were more various
                • The bump feed could work better

                The Husqvarna 537388101 Universal T35 is hands-down our top recommendation for beginners because of its user-friendly construction.

                Aside from the inclusion of a package with multiple adapters to fit most other brands, it highlights an auto-feeding feature that will automatically feed when the head is pushed into the ground.

                While this feature is convenient for you to not feed the line so many times, it prevents unwanted damage and provides the ultimate safety for both you and your gadget.

                Lastly, it’s very easy to install.

                Husqvarna 537388101 Universal T35 Specifications

                Dimension

                3 x 6.5 x 11.2 inches

                Trimmer Head Diameter

                .095-Inch

                Capacity

                28 feet

                Highlight Features

                Includes a package with adapters

                Fed automatically when the head is pushed into the ground

                Verdict

                If you’re in research for an easy-to-use string trimmer head, don’t think twice on this model.

                Best For Quick Reloading: Echo 78890-21001E

                Echo 78890-21001E
                Echo 78890-21001E
                8.6Great
                Pros
                • Short reloading time – only take 30 seconds or less to reload
                • Easy to use – no disassembly required
                • Huge capacity – can hold 20’ of .095” line
                Cons
                • Unclear installation instructions and packing list

                Holding the record of reloading time of 30 seconds, the Echo 78890-21001E excellently brings home our Best Buy for Quick Reloading Award. The best thing is no disassembly required.

                The unit is recommended for trimmers with large engines (equal or higher than 25cc). It will not work with curved-shaft models.

                It is a versatile string trimmer head that can fit both the .130" and the .095" line. Particularly, with the .095” line, it can accommodate up to 20 feet.

                We really like its pump head as it is easy to fill.

                Echo 78890-21001E Specifications

                Dimension

                8.7 x 6 x 2.7 inches

                Trimmer Head Diameter

                .095" - .130"

                Capacity

                20'

                Highlight Features

                No disassembly required

                Reload in 30 seconds or less

                Holds 20' of .095" line.

                Verdict

                For quick reloading, in the straight-shaft trimmer realm, nothing can beat the Echo 78890-21001E off.

                How To Choose The Best Replacement String Trimmer Heads?

                Feed Systems

                • On the market, there are only three main types of feed systems: fixed-line/fixed head systems, automatic feed systems, and bump feed systems.

                Highlight Features

                Pros

                Cons

                Fixed-line systems

                Utilize individual line lengths that are threaded or loaded into the trimmer one at a time as needed

                Making pauses between work fewer and further between

                Decrease wear and breaks

                Suitable for huger, more commercial trimmers

                Whenever the line needs replacing, you have to stop the trimmer

                Automatic feed system

                Use a line-spooling motor

                Finish trimming better as you don’t have to tap the head on the ground

                Take the attention away from your line

                More complicated and expensive to replace/repair

                Bump feed system

                The most popular feed system

                The way they work is bumping or tapping slightly the trimmer bottom on the ground when trimming

                Quick and easy to repair

                Offer a more simplified string method

                Give better control over how many lines you use

                Wear fast and require more regular replacement

                The spring and spool is prone to damage if the bump turns into a slam

                The Dual Or Single Line Head

                • Dual-line heads are perfect for professionals because they cut the grass and branches super-fast and finish the tasks in a shorter time. The biggest flaw of this head type is it’s hard to require some efforts.
                • Single line heads are suitable for daily tasks because of its simple construction and convenience. The reason why they don’t suit professionals is the lack of swiftly cut grass.

                Which Brands Make The Best Replacement String Trimmer Heads?

                Husqvarna

                • Husqvarna is a famous brand specializing in providing a full range of garden and forestry tools, including automatic lawnmowers, chainsaws, lawnmowers, and many more for the whole family.

                Echo

                • This is a reliable address for replacement string trimmer heads. Their products are known for unparalleled quick reloading, whether the straight-shaft or curved-shaft.

                WW

                • At WW, you’ll easily find out the most durable replacement string trimmer heads. This is one of the best brands on Amazon providing not just high-quality products but also at a rock bottom price range.

                FAQs

                How do you remove a Homelite trimmer head?

                Here is a step-by-step instruction:

                • Step 1: Turn off its engine.
                • Step 2: Remove its spark plug wire or unplug it to disable the tool
                • Step 3: Examine the head by turning the trimmer over.
                • Step 4: If you find a nut in the center of the cover, it must be unscrewed.

                Are trimmer heads universal?

                No. they aren’t.

                They come in different types, sizes, and shapes with specific strength and weakness. You need to determine your need and your mower specifications to find out the right one.

                How do I change the string on my head trimmer?

                Watch this:

                How long should a string trimmer head last?

                15 to 20 years for commercial string trimmer head and 4 years for residential one.

                Why does my trimmer string keep breaking?

                Check these issues:

                • Do you cut it through hard surfaces or tough materials, like walls, rocks, and thick weeds?
                • Is your cutting line too old?

                If it falls to the first case, you should avoid crowding the tool into these areas when cutting. Instead, sliding slowly the cutting head toward these areas.

                With the second case, you should replace it.

                Conclusion

                Choosing the best replacement string trimmer heads can be challenging, and there are many things to consider. Luckily there are a lot of great options to choose from and you have us to guide you to the most suitable model.

                We hope this complete buying guide has helped you narrow down the selection to choose the right one for you.

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