Tecnifibre X-One Biphase 16G Tennis String

  • Tecnifibre X-One Biphase 16G Tennis String
  • XONEBIPHASE16G_2021.jpg
$19.90 when buying 5+!
$18.85 when buying 10+!
High heat capacity creates The ultimate performance of power and feel. Playability similar to natural gut.

Composition: NRG2 Micro filaments with polyurethane. The BIPHASE treatment extends string life by 20%. Biphase increases spin and performance.

  • Length: 40ft. (12m)
  • Gauge: 16 (1.30mm)
  • Colors: Natural, Red

Increased POWER and FEEL

Item #: 3185012


1 Star

Sri from on 5/6/2021 12:00:00 AM wrote:

This string is very bad. Started splits from day 1 and broke in 7 days of practice. If you are looking for long term don’t buy this.

5 Stars

TheMate from on 4/17/2021 12:00:00 AM wrote:

Good pop and pockets the ball nicely. Wrist & arm injuries need a comfort string, and so far this is treating my arm well.

5 Stars

Gregg from on 10/10/2020 12:00:00 AM wrote:

I've been using this string for a few years. It has the best gut-like feel of any synthetic I've used. Good control and power by pocketing the ball in the sweet spot.

5 Stars

Rod Ballesteros from on 7/19/2020 12:00:00 AM wrote:

I like this string fits my needs, give all the power, comport with my arms especially the elbow and shoulder. This perfect for me. I’m other string for more than 30 years and I stick with this string for long long time.

Short Lived

4 Stars

Melvin McCurley from TX on 3/18/2020 12:00:00 AM wrote:

I brought the 17g X-One Biphase tecnifibre for my 3 Wilson Clash strung at 55lbs. I’ve hit and played with all 3 four times a week in a two week span. I’m a teaching pro and my level of play is 4.5. The strings plays great and the feel is awesome. The downside, is the strings longevity is short lived. Now, I’m debating trying 16g to compare and possibly going with another brand. This why, I give this string a 4. Was hoping for tecnifibre to be way better.

X One Biphase G 16

4 Stars

yosh from NY on 1/30/2020 12:00:00 AM wrote:

3.5 (USTA rated) level male who exclusively plays doubles in my 30s. I really liked my prior Gamma Live Wire XP but my store stopped carrying it and highly recommended Technifibre X One Biphase 16 as best all around string at my level. Like many of you already stated, it’s really excellent for feel, comfort and control. I tend to string mid range so I don’t pop strings often if ever; seems many here are critical of the durability. Any string is more prone to pop the more tension you opt for, that should be common sense. The one knock is I agree for power and top spin its not as “helpful” to me in my game compared to my older Gamma live wire, particularly on serving and a volley i’m trying to punch with velocity. But maybe thats just the tension being too low and not the strings itself? But for doubles it’s a truly great string if you fancy yourself a shot maker who is cable of hitting a variety of angles/pace/depth. And are willing to sacrifice a little (not a lot of) help with power to get there.

Super String X-One

5 Stars

Syd.T from CA on 12/31/2018 12:00:00 AM wrote:

The most akin to natural gut for players looking for an arm friendly string as well as play-ability. The only down side, is its longevity which is quite short comparing to the others.

Great String for Seniors

5 Stars

Ray from FL on 9/23/2018 12:00:00 AM wrote:

This string is great in my Volkl OS racket. It's comfortable and gentle on my arm while giving me good power and control.

Top synthetic

5 Stars

Gregg from NC on 5/31/2018 12:00:00 AM wrote:

More like gut than all but one other synthetic (Tecnifibre ATP Tour) and they are close. I think Wilson NXT is maybe equal to this, but cost more at the time I tried it.

Arm Friendly String

5 Stars

Marc from ON on 12/8/2017 12:00:00 AM wrote:

Decided to switch to this string on a recommendation and it has worked for me. I play 2-3 times a week and get nearly 10 - 12 weeks before having to restring.


5 Stars

SKIPPER from on 4/21/2016 12:00:00 AM wrote:


Good Poly String

4 Stars

Curt from NE on 3/28/2016 12:00:00 AM wrote:

I use this as part of a hybrid bed to complement a good syn gut. It's lively and easy to use in my stringer and has good longevity.

String Review ...

5 Stars

Jim K from TX on 3/21/2016 12:00:00 AM wrote:

Biphase 16G ... Good feel and pretty durable. Much easier on the elbow as advertised. My string of choice from now on

Super String!!

5 Stars

James S. from GA on 2/22/2016 12:00:00 AM wrote:

Great string in every respect. Very good feel and more durable than you would think for 18g. Better than gut in installation and over all production.

Silky Smooth

5 Stars

PL from IL on 2/7/2016 12:00:00 AM wrote:

I use NRG2 18g in the crosses with Pro Supex Big Ace Micro (19g) in the mains and it provides me with a silky smooth blend of power, control and playability I haven't been able to replicate with any other multi - including Biphase. Compared to Biphase, NRG2 feels more plush and doesn't require the break-in period the former requires. It's silky smooth from your first stroke and when it settles in, it's so nice. Durability for my setup, despite the thin gauge, is pretty impressive in my POG 100's with a 16x19 pattern. Love this stuff.

Red Code 16

5 Stars

Jimbo from AR on 1/26/2016 12:00:00 AM wrote:

Great power, exceptional response, durability. I am a believer in this string, the first Tecnifibre string I've ever used.

Great string; doesn't last long

5 Stars

Jamie from KY on 1/22/2016 12:00:00 AM wrote:

this is a great string; it plays like gut; however, it does break too easily

Nothin' replaces gut

5 Stars

Jimbo Mc from SC on 12/26/2015 12:00:00 AM wrote:

It won't, but a very nice string.. I am a low tension player and get good life and bite from the 17 gauge. very similar to NXT.


4 Stars

DYMC7 from CA on 11/26/2015 12:00:00 AM wrote:

Just bought. Looking forward to placing this gut like string in racquet!

Great Cross String

4 Stars

CJ from CA on 9/29/2015 12:00:00 AM wrote:

Great string aside from the expensive price. Has good power and feel but durability is just ok (typical for a multifilament). I use at as the cross strings with a poly in the mains.

Best string!

5 Stars

James S. from GA on 9/7/2015 12:00:00 AM wrote:

This is the best string for feel and spin that I have ever played with. Very responsive and with a 16X18 string-patterned racquet, it gets great bite. For an 18 guage string it has very good durability.

Easy On The Arm

5 Stars

Joe from on 8/10/2015 12:00:00 AM wrote:

Terrific string and arm friendly. The natural seems a bit softer than the black. I prefer the natural. String at mid + 2 or 3 for a great feel. My string of choice. The 17G also has a bit more feel than the 16G. Best multi I have found. My other half now uses it and prefers it over a Babalot Natural Gut / Luxilon ALU power Combo. I am a 3.5 player. Swing away!

Great Strings

5 Stars

James S. from GA on 7/29/2015 12:00:00 AM wrote:

For the price, this is the best multi-filament string on the planet. Great feel and durability is better than expected.

Best String for Elbow

5 Stars

ReggieC from UT on 7/29/2015 12:00:00 AM wrote:

Love this string, have had elbow problems for years, only string I have used that has helped relieved the soreness. Also had to change Racquets. Best Racquets are Prince.

The real truth

3 Stars

Tennis Pro from MI on 6/24/2015 12:00:00 AM wrote:

Let's start with the positive. This string has great feel and control. It gives me a feeling of being in complete control all the time. For power, I would give it an average mark and same for spin. The 17 gauge strings definitely get more bite than larger strings, but not sure it has a lot to do with the string itself. I would recommend these strings for older players that play a placement game.

Soft String

4 Stars

Andrew McG from NY on 6/6/2015 12:00:00 AM wrote:

After a few years of hitting w/ polyester strings (RPM Blast, Tier One Firewire), I contracted tennis elbow. As a result, I switched to the X-One BiPhase strings. Very soft, gut-like string. Xlnt for arm pain. Nice touch. But nowhere near the power and spin of poly. That's the trade-off. Would likely be good to mix w/ a soft poly in a hybrid fashion.


5 Stars

Beat from on 5/31/2015 12:00:00 AM wrote:

The best synthetic gut tennis string which I have played

Great String

4 Stars

Mots from CA on 5/16/2015 12:00:00 AM wrote:

Very responsive string on my Prince Hybrid Hornet, however with topspin strokes, doesn't last long as with most multifiliments.

easy on the arm

5 Stars

Will Slinger from CA on 5/13/2015 12:00:00 AM wrote:

I had tennis elbow for about a year, but i never wanted to stop playing. This string was the easiest on my arm. It also gave me the playability i needed.


4 Stars

Scarabeush from ON on 4/25/2015 12:00:00 AM wrote:

I give it 8 out of 10. Tested 17g. Playability 9, power 7, comfort 6, durability 10, topspin 7. Good strings however behave way better at tension under 56 lbs (would recommend 48-52 lbs)

great strings

5 Stars

wayne from OH on 4/6/2015 12:00:00 AM wrote:

used in a prince shark mp. powerful and easy on the arm. great service from midwest sports.

Nice String!

3 Stars

a4p from MI on 1/21/2015 12:00:00 AM wrote:

Great string if you have arm issues & still want power.

nrg 17

5 Stars

tonyroll from OK on 12/27/2014 12:00:00 AM wrote:

Super string for the masses great playability very durable great feel and feedback...try bi-phase and nrg together for the ultimate

Great String

5 Stars

Tim from IL on 12/27/2014 12:00:00 AM wrote:

My stringer recommended Tecnifibre TGV when I was experiencing some arm issues. It's a very comfortable string. And I am also impressed with the durability.

My long time favorite.

4 Stars

Jake from FL on 11/24/2014 12:00:00 AM wrote:

This string is one of my favorite multi string. I often switch to poly/syn gut (multi) set up depending on my arm feeling. When I need to go back to multi/syn gut set up, this string is the choice for main. It feels crisp and flush!


4 Stars

TP from CA on 11/12/2014 12:00:00 AM wrote:

I use this in my crosses with Pro Red in the mains great combo. Plenty of power and control only these strings do break after about a wk to 10 days of play.


5 Stars

rl from CA on 10/11/2014 12:00:00 AM wrote:

Like these strings, which to me are comparable to the Wilson NXT but at a better cost. The sale is even better! I like to be able to feel the ball on my strings.

gentle on your arm

5 Stars

H K from NY on 9/21/2014 12:00:00 AM wrote:

great string if you have a tennis elbow... tears quickly though if you play with a lot of top spin

black code

5 Stars

Jeff from PA on 9/17/2014 12:00:00 AM wrote:

This is the best string I have ever had on my head radical mp. You can apply as much top spin or slice from the technifibre black code as needed. It gives you some extra pop on your serve as well. I will never switch away from it to even try another string.

Black Code Rocks

5 Stars

Torry from CA on 8/20/2014 12:00:00 AM wrote:

Black code & luxilon are my two favorites... use in my 325... Tipsy endorsed this one last year and now I think Razor code... Although a little less bite than ALU Rough... it holds tension much longer. Love Tecnifibre

tecnifibre black code 18 gauge

4 Stars

MF from IL on 8/10/2014 12:00:00 AM wrote:

Love this string...easy on the arm, especially for a poly. String Aeropro Drive at 58 to 61 pounds

Best String Made...Period.

5 Stars

Eric Sellers from IN on 7/26/2014 12:00:00 AM wrote:

My son is 11 and plays with this string because of the playability, control, power, and most importantly arm friendly qualities of this string. It does fray and break faster than any string I have seen. But, it is so well worth it. My son gets about 20 to 30 hours before they break. I used to only use poly string and after buying a stringer to keep up with my sons string breaking, I tried it. Wow, I was so amazed. First, the serve. Spin, check, placement, check, power, check. Groundstrokes same with the added touch of being able to drop or lob. Net was also better with angles and just great pop. I highly recommend any serious player to try this string, and you will see all of these instant improvements. Unless your Nadal, which I assume you are not, stick to this multifilament and stay away from poly.

Good for racquetball

5 Stars

roberto from AZ on 6/23/2014 12:00:00 AM wrote:

I use it to restring racquetball racquets and is very durable and playable.


5 Stars

Bhullong from TX on 5/26/2014 12:00:00 AM wrote:

I like the feel, comfort and power combined with this string. Easy on my arm and elbow. It helped improved my game and produces a lot of spin. I used it for my Babolat Pure Drive French Open Racket. Definitely I would recommend it to anybody who wants to improved their game.

Great string

5 Stars

Andrew Fox from IN on 5/1/2014 12:00:00 AM wrote:

Likes: Price, best string I've ever used, looks, they don't break easily Dislikes: None I've used pretty much every main brand string (RPM, Luxilon, Head, Solinco) and I fell in love with this string. It allows me to hit big, but the spin potential is high. It plays well with every shot.

Feel and Pop

4 Stars

bRaD from TX on 4/22/2014 12:00:00 AM wrote:

Good power and touch, but not as durable as other multifilaments I've used. I prefer the Kirschbaum Touch because of $$ and durability. Good cross string for a hybrid (ie 4G or RPM Blast)

Outstanding Polyester

5 Stars

Dan from IA on 4/17/2014 12:00:00 AM wrote:

I have tried all kinds of polyesters (luxilon, Wilson, babolat), but the Black Code is my favorite. I use 18g, so that in combination with the shape of the string makes for big time spin in a hybrid. Its also the softest polyester I've played with, so its great for preventing arm/wrist problems. And it seems to have adequate durability. I'm sure a 16g holds up longer, but I play 3+ times a week at a 5.0 level and might break 2-3 per year. Most of the time the crosses of the hybrid break first. Excellent string- a little pricey, but its worth it.

Best feel of them all

5 Stars

Dan from IA on 4/17/2014 12:00:00 AM wrote:

I've tried out all kinds of multifiliments (nxt, sensation, nrg2, silent partner) and none has the feel of the biphase. I think it actually has better feel than even a nat gut (Wilson). I have used 18g biphase both in a hybrid and by itself. I loved the feel of it by itself, but durability is a problem. One set I had broke 3 games into a match. So now I use it with black code 18g in a hybrid and I love it!


5 Stars

Beat from on 3/31/2014 12:00:00 AM wrote:

best synthetic tennis string ever, perfect feeling and touch

Endurance and control

5 Stars

College Girl from NY on 3/26/2014 12:00:00 AM wrote:

Looking for control like NXT but was popping strings every 2-4 hrs. Didn't like Big Banger or RPM as lost feel- like Head Gut PPS for pop and control, but needed to switch when I was playing 6 hrs/day as was breaking around 10 hrs. This has endurance (14 hrs) and control- lose some power compared to the Head, but I didn't need.


4 Stars

dparker from CO on 3/10/2014 12:00:00 AM wrote:

Read online reviews, seemed to get very positive ratings. Have only tried it once but seems like a very good overall string.


5 Stars

Aldawg from CA on 2/21/2014 12:00:00 AM wrote:

Great feel. My favorite string.

Excellent Value Plays Well

5 Stars

Erik from CA on 2/14/2014 12:00:00 AM wrote:

The string is an excellent value and plays very similar to the gamma synthetic gut, but at a lower price. The lower cost does allow me to play around with string tensions without worrying too much about price. I also string my own rackets, about 1 per month, I play about 3 - 4 times per week.

Best String Ever

5 Stars

Scott from NM on 12/18/2013 12:00:00 AM wrote:

I've used this string for 8 years, and every time I try another string, I go back to it. Natural gut feel at an affordable price. Much more forgiving on elbows and wrists than poly strings.

Very Good String

4 Stars

PJL from CA on 12/14/2013 12:00:00 AM wrote:

Comparable to most of the top of the line multifilaments but at a reduced cost. Very soft and elastic. Tons of power, soft on the arms, but will not last very long. Overall a great string and worth trying.


5 Stars

James Stevens from MT on 10/2/2013 12:00:00 AM wrote:

Lasts at least 4 rounds of 2 hour play. Feel is excellent. Super comfort. Not overpowering. Dumped poly due to shoulder pain, but even without the shoulder issues I would have made the switch back to a multifilament, and this is at the top of what I've tried. Tried the 17g and 18g, 18g wins for spin. Groundstrokes are pinpoint, volleys are solid. I'm a big hitter, with lots of topspin.


5 Stars

Milan from FL on 8/15/2013 12:00:00 AM wrote:

My daughter using this string in the crosses with the Luxilon 4G 16L mains. Great Hybrid combination with power and control.

technifibre string

5 Stars

Cathy from NC on 11/11/2012 12:00:00 AM wrote:

I like this sting. I have a lot of arm issues and the string is soft enough to be easy on my tennis elbow and shoulder. It wears quickly, but that is to be expected, I guess to get the playability.

Great feel and comfort

5 Stars

Keith from WA on 10/20/2012 12:00:00 AM wrote:

Tried 17 gauge first: strung at 60, but not enough pop on serves and strings broke too soon. Switched to 16 gauge at 55, plenty of power and excellent spin. Most importantly, no more sore elbow or shoulder or wrist, gone because of the soft, gut-like feel of this superb string. Buy it!

Great String

5 Stars

Michael Gerth from TX on 10/17/2012 12:00:00 AM wrote:

I use this string exclusively. Great feel, spin, and control. I definitely recommend this string to anyone looking to upgrade from a standard synthetic or something like a Wilson Sensation.