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Tecnifibre Triax String Review

Durability, Spin Performance and Arm Protection baked into one string? Let's take a look.

Tecnifibre, best known for their terrific multi-filament strings, introduced Triax in the middle of last year and billed it as a combination string designed to offer a little bit of everything.

This fusion string weaves polyester and polyamide (regular multifilament) fibres together to create a unique string. The Fusion strings are injected with polyurethane resin to reduce shock and protect the fibres from wear.

The result is supposedly the best properties of polys (control, spin, durability) combined with the best of multifilaments (power, comfort, arm protection) all melded into one string.

So how does Triax perform? Can it really capture players who exclusively use polyester and those who prefer multifilaments? Let’s take a look in this full Tecnifibre Triax review.

Tecnifibre Triax Specification

Triax Specification

Check Latest Triax Price

The first multifilament with co-polyester fibers, it offers the player a unique playing feel combining firmness, control, and comfort while keeping long durability. Tecnifibre on Triax

String Used For This Review

  • Multifilament Poly Fusion 16 gauge / 1.33mm

Racquet Setup For Testing

  • Strung at 26kg(~58 lbs) as a two-piece.
  • Frame: Wilson Pro Staff 97. No customisation, standard 305g unstrung.
  • Previous strings on the frame: Natural Gut + Luxilon Alu Power Rough

How It Looks

Triax Closeup

With most brands bringing out strings in all manner of funky colours like Solinco’s Hyper G, it’s fair to say that Triax is positively bland when it comes to aesthetics. 

However, that’s not a negative in my eyes, and I prefer the more neutral coloured strings. The colour is classed as natural, and it looks pretty similar to natural gut.

When strung in a classic frame like the Pro Staff and the Wilson stencil, I think it contrasts against the black hoop.

The string feels like a typical multifilament string with no rough edges or shaped sides to produce spin. It feels fairly slick and easy to string with, thanks to the coating designed to reduce abrasion. Kinking is also not a problem.

How Technifibre Triax Plays

Triax String Pro Staff

Overall, I played with Tecnifibre Triax for about 50 hours of play (2 string jobs) on outdoor artificial grass and indoor hard courts. Here are my thoughts.

First Impressions

After my first hit with the Triax, I was instantly a fan. To me, it felt like a natural gut, and if someone had told me “Hey, try this new natural gut” I don’t think I’d have really questioned them without looking at the string closer. 

Of course, it feels a bit crisper. And slightly stiffer, but after my first few hits, I felt like it offered good control, plenty of feedback and didn’t need adjusting back into place between points.

Feel and Groundstrokes

Triax gives a crisp yet comfortable feel from the baseline, and it plays like a gut/poly hybrid setup, offering plenty of feel and control.

Based on that I’d say it does deliver as advertised, a hybrid string job is regarded as the best of both worlds (power + control), and Triax mirrors that kind of setup, without needing to buy two different reels of string or buy a pre-packaged hybrid.

Depending on how you play from the baseline, Triax will work well for flatter hitters, feel based players or those who hit with some spin but don’t impart Nadal like RPM’s.

The comfort is also excellent, way above any polyester string I have ever tried. For those who like soft polys, then one comparison would be like a comfier version of Luxilon Element.

Control and Spin

With some poly like characteristics, I found control higher than most nylon strings and I liked both the sound and feel at impact, which was predictable.

Players geared for topspin will find more than they would in a nylon setup, but nowhere near as much as they’d generate from a spin orientated polyester. 

If your game is like that of a Casper Ruud type modern player who hits with huge RPM’s on every shot, then you’ll break Triax quickly and likely yearn for more spin. But for a player with a more conservative grip who uses spin as just one option, you will get what you need.

Power Return

I found Triax almost gut like, so it pocketed the ball nicely and delivered plenty of power on full swings. Again, like a gut/poly hybrid, there’s something in there that tames the power, and I was able to take full cuts at the ball and still keep my shots inside the lines.


Even after several sessions, string snapback was reliable, with no real notching or fraying. Eventually, I saw some light fraying, and I think this would be exacerbated if Triax was paired with rougher string in the crosses or mains, but it is long-lasting as a full bed.

Tension maintenance is also a plus point, and Triax will be a good string for players who don’ want to restring often as I think you could leave this stuff in for a few months with no problem.

How To Get the Most of Tecnifibre Triax

Triax Setup

If you are currently using a hybrid setup with a poly and softer string like a gut or multifilament, then I’d recommend testing a full bed of Triax.  

This string feels right at home in a racquet like the Pro Staff 97, and it is one I will continue to use as I get plenty of durability, feel and control. As someone who isn’t a huge spin player, this string suits my game well, so if you are similar, give it a try.

It’s also a good bet for seasoned polyester users looking for something a bit more comfortable while still imparting a good amount of spin. 

For parents, Triax will also be a good string before moving your child onto full polyester strings, which seem to be happening far too soon these days.

Final Thoughts

Triax Stringing

Triax delivers a string bed that is firm, responsive and durable yet still comfortable and arm-friendly, so it does deliver on its claims.

Based on using this for 2 months, it’s currently my favourite multifilament string on the market and will be my string of choice in the future for the next few months. 

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  • Arm friendly
  • Good durability
  • Offers gut like properties with being impacted by weather


  • Carries a hefty price tag
  • Not ideal for heavy topspin/string breakers

Have you tried Tecnifibre Triax? Let me know in the comments.

Tecnifibre Triax String Review

Power - 8
Control - 8
Comfort - 8.5
Spin - 6.5
String Movement (Lack Of) - 9
Durability - 9



One of my favourite strings on the market. It feels very much like natural gut with a similarly hefty price tag.

Get Tecnifibre Triax
User Rating: 3.01 ( 52 votes)


Editor of Perfect Tennis and a big fan of Roger Federer, I've spent countless hours watching and analysing his matches. Alongside playing the sport, I also enjoy writing about the tour, rackets, strings, and the technicalities of the game. Whether it's breaking down the latest tournament results or discussing the latest gear innovations, I'm always eager to share my insights with fellow tennis enthusiasts.

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  1. Thanks for this article Jonathan, I might have found an arm friendly alternative to the Luxilon Alu Power that I use currently.
    I like the durability and its tension maintenance properties, but it is heavy stuff for the arm&shoulder…

    1. Full bed of Alu Power?

      I would try a gut / alu power hybrid?

      Triax is a very good string though as I don’t think I really need a poly, so I will continue to use it until it’s time to test something else.

  2. Hi, nice review. This one should go to my list of strings to move to as therapy from polyester. I’m just not sure if it would be a good fit to the Pure Drive. I once had X-One on it but it felt odd. On the opposite, the thing I rue the most is not having kept the original Babolat XCel that came with the frame. If Triax plays like that, it’s a winner.

  3. I play with a gut poly hybrid in two Strikes and a full bed of Triax in the third. I have the triax strung higher for the days I need more control but don’t want too much additional stiffness. Very impressed.

      1. I find it quite similar – my gut poly set up is 54lbs mains and 52lbs crosses with gut mains/poly crosses. (VS Gut 16/Babolat rpm Rough 17)

        Triax at 55lbs feels stiffer than the hybrid set up but not overly and a little deader on the ball. Still lively but not overly so and arm friendly. I do find I can generate equivalent spin to my gut poly set up. Next stringing I will try it at 52lbs and see if some additional feel and power shows up.

      2. Ye, I am the same, I was using Babolat gut and Luxilon in my racquet prior to putting Triax in.

        I didn’t really feel a whole lot of difference between the two tbh. But I am not hitting for 5 hours a day, 7 days a week, or at a super high level, so unless the change is night and day, then it’s not always easy to pick up differences. There are plenty of polyesters I wouldn’t be able to tell apart if they were all the same colour.

        I played well with it straight away too, which always helps shape an opinion 😄

    1. Hi James,

      Recently picked up a PS16x19 as a more easy to play alternative for my technifibre TF40. Strung it fairly low with RPM Blast. I struggle with the comfort, too stiff in this racket. How does Triax or a gut/poly perform in the PS ? Does the racket not become to powerful? (I hit fairly hard, medium spin).

      1. HI JAcob sorry for the absultely late reply. I reecently went back to a full bed of triax after some poly hybrid experimentations last year. I think it is the best of both worlds. For me the top qualities i’m looking for in a string is tension maintenance, power and control/spin.

        Triax has all that – strung at 56lbs it has a little less power than my previous gut/poly hybrids (56/52) with similar or better control and a little more spin potential as i was using gut in the mains so not getting the full amount of spin i might otherwsise get had i used a poly in the mains.

        I think if you try it strung up 56-58lbs you’ll find full swings no problem. Defintely not too stiff for this racket.

  4. Thanks for the detailed review Jonathon! Have you tried the the X 1 Bi phase in the past?
    How does the Triax compare to the X1?
    I am switching to Multifilaments as I have (and prefer) a lighter racket which as expected is short on power (it came pre strung with Syn Gut).

    1. Thanks.

      Yes, I have used X One Biphase quite a bit. Triax offers a lot more spin potential, X One Biphase offers more power, holds tension slightly better. Those are the differences I found. Comfort, no different tbh for me personally.

  5. As a 4.0 player this string makes so much more sense to me than the polys that I tried- the extra put-away power helps and the pocketing and feel are a joy! It also doesn’t get that unresponsive feeling after a couple of sessions like the polys did for me. Therefore, it can stay on the frame longer, making up for the higher cost

    1. Thanks for the comment.

      I agree, for a big % of players, this string makes way more sense than a polyester.

      I have kept mine in way longer than I would a poly and it is still plenty playable.

  6. Just starting using this string and I love it. Felt great immediately. Gives control, power and is arm friendly. It plays a lot like gut. I just started playing again after a 20 year absense and have been trying to find the right string to use in my prince graghites. I have 17g strung at 65 lbs. Next I’m trying same tension with hybrid set up Triax on mains with VS gut on cross.

  7. Jonathan, great review. I’m a flat ball hitter who’s played multi’s for years due to arm issues but craved a little more spin and control. After using an Ashaway hybrid setup that I really liked for maximum swings and power, my arm just couldn’t take it. I moved to Triax after much research. Couldn’t be happier with the choice. Not as much pocketing as the hybrid but I can take full swings, generate good power and keep the ball in court more frequently than other multi’s without the nagging arm issues. Plays well around the net and does lend some power on defensive shots where I’m extended or having my shoes untied as I play with a moderately heavy, low RA racket. Will likely drop the string tension to 55 from 58 to make it a little more playable early since it seems very stable after 50 hours court time. Might try the 17 guage but I don’t tinker too much when things are working. Of course, good footwork, focus and timing make every shot better; barring that, Triax is my jam.

    1. Hi,

      Thanks for the comment and feedback.

      Same for me, I’ve not had arm problems but Triax is one of my favourite strings out there, feels great, has decent spin, good durability, even more so if you hit quite flat which I do. I think more people should use it instead of polyester…

  8. I was using X-one biphase 17g in my RF97A and was looking for a string that does not break as often (I was getting 4h per string set on average) so I tried out Triax instead for its increase in durability. I found it less comfortable than x-one at the same tension (54lbs) with a harsher feel on impact and less pop. I did develop some arm pains quickly while using it (maybe from trying to swing harder?), even with dropping tension a couple of pounds to try to get more comfort out of it.
    In the end, I went back to x-one in 16g to get more durability (I get about 6h on one set now) while retaining the comfortable feel I have come to appreciate. Elbow discomfort disappeared quickly.

    1. Thanks for the info.

      I didn’t find much difference in comfort personally, in terms of stiffness, X one biphase is stiffer, but it is very much horses for courses on what can cause arm problems.

    2. X-1 is closest to gut from my understanding of the tecnifibre or multis out there. I have only compared triax to NRG2 full bed or gut/poly hybrids. I can see some of the issues you mention – it is harsher than NRG2, though when coming off a gut poly hybrid which was 50% poly – it is slightly less harsh(most likely when the poly has gone dead)

      In my recent experimentatiions i have really yet to find a strong enough argument for using poly for my set ups.

  9. Jonathan, thanks for the review. I have tried some Technifibre strings before (X1 biphase, Ice code) and I think Technifibre did a great job on strings. I really love how X1 plays and feel, but I broke it within a month, so I changed to full-bed polyester. After reading your review, Triax will definitely the next string I will try, given same feel but last longer and offer higher spin. Thanks!

  10. Hi Jonathan

    I just strung a radical OS with Triax at 54lbs and liked it a lot

    Have you tried ashaway monogut Zyex (zx) full bed?

    It would be good to hear your thoughts as a poly alternative

    1. Hi,


      Yes, I have used Ashaway Monogut ZX many times, I’m a fan of it. Excellent power, comfort and durability. I think it offers almost as much spin potential as a poly without the stiffness. And at the same time has a few of the properties you get from the natural gut.

      I will try to do a review of it in the future, but the list of strings I have to review keeps growing 😀

  11. I’ve played a lot more with Triax recently fwiw in my Pure Strike 16×19 – its great as a cross – I have used it with NRG2 and X1 in the mains and it works great in a control racquet with that set up – similar to ta Gut/Poly RF hybrid but with multis.

    I have also recently tried Triax in mains with Head Velocity MLT as crosses and its durability dramatically fell.
    I have always used MLT as a cross wiht NG so thought this would work to give me the spin i was looking for AND some durability. It did not fair well.

    I wiill keep it as a cross for now.

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