2X5MTR X 1.65mm STRIMMER CORD/LINE / STRING/ WIRE. IDEAL FOR FLYMO STRIMMERS. Flymo 20m Nylon Strimmer/Trimmer Line FLY0-90. The Flymo C-Link 20V Grass Trimmer is a lightweight grass trimmer aimed at cutting grass edges in small to medium-sized gardens. It can be bought as a complete product or as one of three interchangeable attachments that fit onto the same cordless power head. The other products are a hedge trimmer and a blower (C-Li 20VHT and C-Li 20VB). Wire wrapped around shaft under Strimmer spool drive.? Whilst strimming, my Flymo Multitrim Strimmer suddenly stopped. Close inspection showed a length of copper wire wrapped around the shaft UNDER the spool drive. I cannot get at it without removing spool container/drive. How can I do this, please? Joyce July 2016.

Not all strimmers have blades. In many models, the string provides the ‘cutting edge’ by spinning fast enough to get stiff. This stiff surface slices through grass and weeds. The string hangs a few millimetres or inches off its spool. It’s these exposed bits of string that chop.

On some models, a blade is added for tougher targets like brush or twigs. So when you’re looking for the best strimmer line, it needs to be rigid enough to cut through grass but flexible enough to whirl without breaking. Let’s look at some top models and their benefits.

Flymo FLY021 Double Line Autofeed Spool and Line - Red
Oregon Flexiblade Serrated Heavy Duty Trimmer Line for Brambles and Undergrowth, Nylon Lines for..
Husqvarna Titanium Force String Trimmer Lines, Orange/Gray, 0.1' By 1/2'
Bosch F016800351 Replacement 6 m x 1.6 mm Spool Line for ART 30-36 LI, ART 30, ART 27 and ART 24
ARNOLD Maxi-Edge .08-Inch x 140-Foot Commercial Grade Trimmer Line, Original Version, 1
BLACK+DECKER A6046-XJ Replacement Strimmer Line, 37.5 m
Ryobi RAC101 Cutting Line, 15 m x 1.6 mm

The Best Strimmer Line on UK Market 2021

1. Flymo Autofeed Double Line

Threading a strimmer isn’t difficult. But it can be annoying. So when you find a strimmer line that’s already wound onto its spool, it makes life so much easier. And this Flymo strimmer line comes pre-strung, so less fuss for you! Especially because this a double feeder – those are more cumbersome to wind. But remember, this line is specifically for Flymo grass trimmers.

Does the model make a difference? Yes. The line is compatible with over a dozen Flymos ranging from the Mini series to the Twist & Edge. It’s a 1.5mm line fitted onto an electric strimmer. So it’s best for light, quick work on soft grass or broadleaf weeds. It doesn’t have the rigidity or cutting power for tougher grasses and it will barely survive brambles or brush.

It does have a few delightful features. The string is a cheerfully translucent red (it’s the little things!). But you’ll find it described as ‘grey’ because that’s the colour of the spool. The line is 5m long so you should get a lot of use out of it. But this is almost the finest gauge on the market, so keep a few spare spools around the house. It weighs about 65g but is fairly tough.

And remember, if you fit non-Flymo nylons onto your Flymo strimmer, you might void the warranty. So even if your strimmer still has nylon in it, you should change the spool at least once a season. This is because the string degrades naturally, even when it’s in storage.

One thing to check is the slack of the string. Some may need to be unwound and rewound before fitting. If you position a spool whose string is too tight, the thread won’t have sufficient give so it won’t slip out smoothly. Meaning it won’t cut effectively. So if you need to, take the extra step of unfurling and re-looping your string. There are tons of tutorials.

If you own a Flymo and you’re looking for a low-gauge line for light yard work, consider this pretty one. It’s a fine line – no pun intended – intended for use with electric strimmers.


  • It’s 5m long and 1.5mm thick.
  • It comes with a spool and fits multiple Flymo models.
  • The string is customised for double-line auto-feed devices.


  • If your strimmer isn’t a Flymo, this may not fit.

2. Oregon Serrated Heavy-Duty Line

For strimmers without blades, the quality and texture of your strimmer line are crucial. It’s why this Oregon strimmer string is serrated. The sharpened, serrated edge provides a saw-like effect that is especially effective against tough stalks. The string itself is square-shaped to provide a rougher cutting surface. But this shape does have a slight downside.

Because most strimmer heads work with rounded threads, this square line has fewer options for interbrand replacement. In the right equipment though, this jagged string gives you tons of chopping power. And it’s 4mm thick so it’s ideal for heavy-duty yard work. The nylon is 110m long so you can a lot more life from a single spool. That sawing action is loud though.

And while this strimmer string feels versatile, it’s still a niche product. Sort of. Yes, it works with 2-line and 4-line trimmers … but only if they’re Jet-Fit. For other brands and bump-head models, the string won’t fit. Also, the sturdiness of this Flexiblade line sometimes works against it. When you first unpack it, wiggle the wire to see how supple and pliable it is.

Why? This line sometimes hardens in shipping or storage. So if it feels too brittle to use, try soaking it in hot water before threading it. Otherwise, you’ll pause your trimming every ten minutes to renew the feed. It lasts longer than round lines though. And it cuts cleaner because the jagged edge and square shape create a wider surface area for slicing grass.

If you’re worried about your strimmer overheating, it won’t affect this nylon. The Flexiblade is strung to work with high temperatures over 265°C. And Jet-Fits are low-noise models so you could consider replacing your current strimmer head with a Jet-Fit. It’ll make your yard work swifter and quieter. You’ll cut down fuel as well since Jet-Fit is energy-saving.

This square-cut serrated strimmer line offers neater lines and cleaner edges. It can function in extreme heat. But it won’t fit generic strimmers so double-check your model number.


  • This is a heavy-duty 4mm line that’s 110m long.
  • The edge is sharp and square.
  • It’s compatible with both 2-line and 4-line trimmers.


  • It won’t work with bump head strimmers. You’d need to install a Jet-Fit first.
Flymo strimmer wire b&q

3. Husqvarna Titanium Force String (Our Top Pick)

How much strimmer line do you need per month? It depends on how large your garden is. And how often you trim it. If you’re a twice-a-week user, you want a decent length. But a 4m string is on the higher side for home use. Especially since you only use a few inches per trim.


Still, the quality of Husqvarna may have you buying it in bulk, so this works. It’s a 2.41mm line. And unlike the brand-specific nylons we’ve looked at so far, this one can be used on any type of strimmer. The shipping package includes a bonus blade for snipping the line as you loop it. It’s a bit awkward to use – the line snipper – so scissors will work fine. Or a knife.

The spool s quite large – almost a foot in diameter. That’s great for line storage. At 25cm, you won’t lose the loop in a junk drawer. But you do need to cut smaller bits to feed into your trimmer. This strimmer line is made from co-polymer so it has certain advantages. It’s quieter when it cuts, regardless of what motor, trimmer, or brush cutter you load it in.

This is an American product but it’s easily available here. The string is engineered to accelerate faster and stay level as it swings through the grass. Its design upgrades extend the usability and lifespan of the string. But it’s a light-duty strimmer line that works best with average grass. It won’t hold against brush, thatch, or thicker grass stalk varieties.

You may be uneasy about how a petrol strimmer will affect your carbon footprint. Because yes, this copolymer is designed for petrol-powered equipment. But it’s also modified to conserve fuel and maximise efficiency. So yes, you’re ‘burning gas’ but you’re using a lot less than you would with other strings. And it’s less physical exertion too, so it wins all round.

Husqvarna easily makes the best strimmer line. It’s half as noisy, it picks up speed effortlessly, and it’s fuel-efficient. Plus it comes in a stylish silver shade (and orange too).

Flymo Strimmer Wire


  • It’s 50% quieter than other strimmer lines.
  • The line comes with a free nylon cutter.
  • You can order it in orange or grey.


  • It’s quite a large spool for domestic use – you can get away with something shorter.

4. Bosch ART Spool Line

If you’re into billionaire biographies, you’ve probably read Steve Jobs’. In it, he talks about the difference between his approach and Bill Gates’. Steve built an OS that only works with Macs. Bill built one that works with any PC, just like Android did with smartphones. The merits of both can be argued for weeks or even months. But in this case, we’re #TeamSteve.

How so? This Bosch is only compatible with ART strimmers. And there are four popular models – the ART 24, 27, 30, and 30-36. The upside? ARTs are among the UK’s top-selling strimmers. So you probably have one already. Meaning this exclusivity won’t work against you. But let’s forget about the trimmer and focus on the string. What do we love about it?

For one thing, it’s 1.6mm thick. That’s on the lower side so you should restrict this to the most basic yard work. Faster trims spaced closer together. Maybe every week or so to avoid straining your strimmer. It’s a replacement wire so it’s only 6m long, but that’s plenty. The line is round but it isn’t smooth. It has grooves along its length that heighten its slicing.

And it’s a replacement line, so that spool won’t fit your strimmer head. And it’s a lightweight line at just 40g, but that’s because it’s not a long one. This is an emergency fix when you run out of line mid-trim. You should always keep a spare piece around to hold you until your next order comes in. Also, this line is intended for electric strimmers (which all ARTs are).

This is a good option for quick fixes before you buy a whole new roll. But winding the spool at home can be tricky so you might be better off buying a full-size pre-wound spool.


  • The textured thread offers more cutting power.
  • This string is compatible with various ART models.
  • It’s a small spool but it’s already wound.


  • It only works with ART strimmer models. But a lot of people own ARTs so it works out.

5. Arnold Maxi Edge Trimmer Line

Maxi Edge strimmer lines are colour coded by width. So once you know what’s what, you can easily grab the right pack. This one is green, meaning it’s a 2mm line (0.08 inches). It’s another American brand that’s pretty popular over here. But remember, the weather is different across the pond. So check that it can handle the varieties of grass in your yard.

When you look at the images – or even the pack – this looks like a regular line. But the six-pointed star-shape on the packet reminds you that the string has serrated sides. And these jagged details make it easier to whip through weeds and strong grass. This is a median line that’s 2mm thick. So it can handle average yard maintenance. Nothing too strenuous.

That said, it can cut three times the area of typical strimmer lines. And the shape makes it easier to trim edges, tight corners, decks, kerbs, and intricate edging. The blades will slip into the star-shaped grooves and slice effortlessly. Curiously, the wire that comes with original Maxi Edge strimmers is smooth. It would be interesting to see a side by side comparison.

And if you’re wondering why the ART replacement line was 6m, that’s the average length of a full strimmer head. This Maxi Edge is 42.7m so you can refill your head seven times before it runs out. The included cutting tool makes it easy to splice the yardage you need, though scissors will do. And it’ll work with any brand, whether the shaft is straight, curved, or split.

If you don’t mind buying American, this is a good strimmer line option. The star-shaped thread cuts more efficiently and it’ll fit multiple brands and types of grass cutters.


  • It lasts thrice as long as rival lines.
  • It’s a universal fit that cuts across brands, pun intended.
  • The line is long enough for seven strimmer string-ups.


  • It doesn’t perform well when you trim tall grass – it’s too light to stay level.

6. Black+Decker Strimmer Line

What does it mean when you buy a replacement line? If you’re inexperienced, you might not spot the difference. Yes, both the original line and the replacement might be tied around a spool. But the original spool is the exact size and fit for the strimmer head it came with. The slots are in the right spots, directly aligned with your line feeder. Especially for automated ones.

But the spools on replacement lines are purely for shipping and storage. They won’t sit snug in your strimmer head. You’ll have to unfurl the string then wind it around the prior spool. That said, this replacement line is versatile enough for various brands, models, and sizes. It’s not just for Black + Decker. But look through the list of compatible trimmers, just in case.

This thread works with automatic line feeders. So as flexible as it is brand-wise, it won’t work with a fixed feeder or a bump strimmer. But at 37.5m, you can draw out six or seven refills from the same replacement spool. And the storage spool has clips on it so every time you cut off a new section, you can clip the snipped edge in place to prevent it from unravelling.

Black + Decker lines are reasonably simple to use. You can use it to replace all types of strimmers, including electrical ones and rechargeables. But remember, this is close to the thinnest line-gauge available. So you should only fit it for low-labour jobs and fine grass. The line isn’t hardy enough for clearing bushy patches and abandoned lots. That’ll frustrate you.

When you’re looking for a convenient fix for your occasional trimming needs, this works. But only for low-fuss work. If you’re excavating neglected yards, get something stronger.


Flymo Strimmer Wire
  • It’s a multi-brand strimmer line.
  • The line is 1.5mm thick and 37.5m long.
  • It’s best for automated line feeders.


  • It’s a replacement line so be ready to wind.

7. Ryobi Cutting Line

Again, for those of us who go nuts over covers, this line is like a siren. Be careful though – these colours have meanings. No, it’s not about branding and social justice. It’s a lot more functional. Ryobi lines come in purple and orange, but they’re not identical. The purple line is 1.6mm thick while the orange line is 1.2mm, so double-checker your strimmer’s sizing.

Both these lines come in 15m swathes. That’s enough for two or three refills, depending on the size of your strimmer spool. This particular purple line is aimed at electric strimmers. These are a lot less powerful than petrol strimmers. And they’re restricted by the cord length of the strimmer. So this line – like the trimmer it’s moulded for – is intended for light work.

The proper marking for this colour is violet. But even if your hardware attendant can’t distinguish cobalt from cerulean, you can request the line by width and you’ll get the right version. And it isn’t just built for Ryobi strimmers. You can fit this string into any AC strimmer. But never use it with petrol-powered Ryobis. It’s not strong enough for that.

You can use it in rechargeable strimmers though, and cordless ones. The main decider is the gauge required by your strimmer. If you need to, you can step down to the 1.2mm orange line for your battery strimmers. This is a no-frills roll of string. It doesn’t have a storage spool so keep it carefully to avoid tangling. Luckily, the smooth sides are easy to wind on any spool.

With options for 1.6mm (violet) or 1.2mm (orange), this is a good strimmer line for light work. But it won’t saw through harsh British grass so confirm your garden varietals first.


  • The lines are colour-coded for convenient selection.
  • They work especially well with electric grass cutters.
  • The thread is round with smooth sides so it’s easy to spool.


  • It’s a fine line so it will only slice through fine grass and soft weeds.

Buying Guide

When you’re shopping for a strimmer line, you need to check that it’s compatible with your strimmer or brush cutter. Find out whether it plays well with blades – especially if you prefer split-shafts. They’re more likely to have a cutting surface. What else should you look out for?

Power Source

String Trimmers (aka strimmers) use super-speed string to cut through blades of grass and weed leaves. And their spinning speed depends on what’s driving the motor. Strimmers can be electric, battery-powered, or petrol-powered. Strimmers with rechargeable batteries are greener and often quieter, but you’re restricted by battery life and charging duration.

Electric strimmers can be useful, but you’d probably need an extension cable that can limit your cutting distance. Plus, that’s just an extra wire to trip over. Nobody wants that. Petrol-powered (or gas[oline]-powered) strimmers are stronger and have more power. But they’re also louder. More power means you need thicker, longer strings since they’ll cut more often.

Attachment Options

Investing in a strimmer means your nylon thread will be your primary cutting tool. So you’ll need to refill it often. But if you buy a split shaft strimmer with alternative blades, your nylon line may last longer since you’ll be using it less. The thread gets a ‘tea break’ each time you swop blades. And if it happens to run out mid-trim, you can use a blade before you get more.

If you’re the type of person that’s drawn to bright colours, don’t shop alone! Yes, the best nylon line comes in multiple hues. But that’s just a marketing tactic. You don’t have to get a tone that matches your machine (sacrilege!). Instead, focus on other qualities. Check the recommended gauge on your strimmer first. Then see if it comes in your favourite shade.

Line Dimensions

We have hinted at string gauge. This refers to the length and thickness of your nylon line. Strimmers accept string lengths of 1mm, 2.4mm, or even 4mm. So get the right size for your strimmer. You can also check the number of lines and the extended length. Some devices have two lines while others can have up to four. You can find some with central ‘padding’.

This means the line has a protective outer coating with a tougher material running through the middle of the string. This way, your nylon lines can withstand edging, rocks, and harsh grass without breaking. Think about your strimmer’s feed mechanism as well. The hardware store can recommend the best strimmer line for automatic, bump feed, or fixed trimmers.

String and Strim!

Given all these factors, we think you should buy the Husqvarna. Here’ why:

  • For fussy colour selectors, it comes in orange or silver/grey.
  • Its acceleration is quicker than the average, pun intended.
  • The gauge is stable enough to stay level even at speed and height.
  • The line itself is 2.41mm thick and over 40m long.
  • You can thread it on any standard strimmer, regardless of brand.
  • It’s American-made … which could be a plus or a minus …
  • It comes with a free line-cutting tool.

What trimming thread is fitted in your weed whacker? Show us photos in the comments!

5/5(23 votes )

Often after purchasing your grass strimmer the first question can be, what strimmer line to use with it. It’s even possible you have gone ahead and bought the wrong type for your needs

A common problem is when the line keeps breaking off. When this happens it’s usually because the strimmer line thickness being used is too thin. A heavy duty strimmer line will need to be used if the area being trimmed has long grass or stubborn weeds growing.

There are many choices of line available to us these days. They come in various colours, shapes and sizes. In fact enough to make the head spin for those just getting into using a grass trimmer.

The good news is that many of these lines will not be required for general garden use. A lot of them will be more suitable to the professional garden maintenance people.

That being said it’s always a good idea to know what particular one will be best to work with your equipment and what you intend to trim down.

To help you understand what thickness of line you should be using I have divided them into 3 categories. Light work, medium and heavy work.


  • 1 If Your Strimmer Line Keeps Breaking

As a general rule:

Flymo Strimmer Wire

Flymo Strimmer Wire Argos

To determine what strimmer line to use you need to take into account what type of growth you will be cutting down. Experience can certainly be gained with the more you use your trimmer although the following guide will get you started.

Light work thickness range from 1.2 to 1.4mm. See a selection here.

Medium type work could be done using 1.5 to 2mm line. View them at this link.

Heavy duty lines range from 2.4 to 3mm. Select your version.

Anything heavier than this is moving up to a commercial grade such as, 3.3 and the 4mm sizes.

If Your Strimmer Line Keeps Breaking

Mainly the type of garden or area that needs to be maintained will determine what type of trimmer you’ll need. Once determined and your trimmer has been chosen then you’re pretty much tied into which line you can use. So choose your equipment wisely.

Flymo Strimmer Spool

Attempting to clear a rough area of long grass and heavy tough weeds will only succeed in destroying your equipment if not designed for such work. If light trimming wire were to be used, you would be spending most of your time stopping and starting due to broken and tangled line.

These tough jobs require tough tools fitted with tough cutters.

Light Duty Work

The image at the top of this page is for light duty trimming wire. It is rated at 1.2mm gauge and suitable for lighter trimming use.

See the post 5 Best Cheap Electric Strimmers for some examples of units you would use this type of trimming wire on.

Flymo Strimmer Wire Case

Light duties such as trimming lawn edges or light weed removal are fine for 1.2 to 1.4mm trimmer wire. Although if it were to be cutting up against a brick wall or over a concrete path it would wear much more quickly.

The image opposite features plastic blades which are used by some manufacturers.

These blades are used with the Bosch ART 23 Easytrim Accu.

It’s a cordless version that uses a 14.4 NiCad battery. If you want to learn more about cordless strimmers, go here.

Medium Type Work

If the above situation of cutting against hard surfaces is something similar to your own situation you might consider moving up to a medium 1.5 to 2 mm strimmer line.

This heavier gauge would also be suitable to maintain areas that have longer grasses and weeds to keep in trim.

This spool is a heavier graded line of 1.5mm. It is used with the more robust Black & Decker GLC3630L20-GB. This model uses a more powerful 36 volt Li-Ion battery than the Bosch ART 23 Easytrim above.

This extra power will allow the cutting of heavier growth without draining the battery too quickly. This model is also featured at the link above.

Heavy Jobs need Heavy Duty Strimmer Line

Anything heavier such as long tough overgrown areas of grass, nettles and other tough weeds will be best trimmed with a heavy duty petrol strimmer. Preferably fitted with something like 2.4mm strimmer line up to 3mm heavy duty type.

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The image opposite features the Timberpro brush cutter. This machine seems to be picking up some good reviews by users so I have added my own review to the site. Check out the best petrol strimmer for your money.

I’m using the image here to give you some idea what is required for heavy duty stimming.

Along with the pre-loaded stimming head they also provide 3 blades for cutting those tough brambles etc. I’m thinking this powerful tool could be used for many commercial situations and comes in at a very competitive price.

Moving on to commercial use there is a selection ranging from 3.3 to 4mm sizes mentioned earlier. These include serrated, twisted and also brush cutter blades. These will make light work of undergrowth such as brambles and thistles etc. Learn more about the strimmer blades available in this post.

What Strimmer Line to Use – Just Common Sense

Rather than having an expensive experience, weigh up what you are about to trim. If you have already made your purchase, check out the manufacturer’s handbook that came with the tool. You should find instructions advising the type of trimmer wire most suitable to use with that particular tool.

If you are about to purchase a new lawn trimmer, then check out the different situations above to ensure you buy what’s most suitable for your needs both now and in the future.

Using both your eye and a bit of common sense will tell you what strimmer line to use for each individual job. The correct choice will save you money, time and many a headache. Check out the full selection here.

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