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  • Description
  • Customer Reviews
  • Tennis Express Reviews
  • Specs
  • Product Specs
Description

Tecnifibre X-One Biphase 17 provides more spin and power than its 16 gauge counterpart.  The ultimate in synthetic strings, providing the closest playability to natural gut of any synthetic string produced, giving players maximum power, feel, and comfort. Elastyl Fibers are used, giving 12% more power than the standard polyamide materials used in other synthetic strings. X-One Biphase features a unique technology that separates it from other strings in the Tecnifibre line, Fiber H2C, which involves a high temperature prestretching step to ensure greater tension maintenance. Improving on their PU Inside technology, this string features Trimerized PU, allowing for even more comfort and touch for that natural gut like feel. Many years of research have led to the Biphase process, a production process that increases string durability by 20%, letting players experience the benefits of this string for even longer. The most advanced synthetic string on the market, X-One Biphase makes the playability of natural gut available in a synthetic alternative. Also check out the line of Tour-developed Tecnifibre racquets.

Construction: Multifilament polyamide
Color: Natural
Gauge: 1.24mm

Need help selecting a string? Check out our Choosing The Right Tennis String guide for more assistance.

Customer Reviews
Tennis Express Reviews


TX
July 2010
"X-ONE" IS THE ONE FOR ME....
5/5
I have tried alot of the better strings on the market, and by far the X-ONE Biphase is the best string for control, feel and power. I use this string in the mains with a textured poly in the cross for added spin and feel.This product has enlarged the "sweet spot" on my racket, and I am really enjoying the better feel of the 17G, with plenty of durability.


ca
November 2010
Tecnifibre X-One Biphase
5/5
I have been stringing with natural gut for about 3 years now in a hybrid fashion. Someone gave me a package of the Biphase to try and I have become a believer. This string really is as close to natural gut as the company pitches. Try it, Mikey did and he liked it.


CA
November 2010
NOT FOR EVERYONE
2/5
I trust the Tecnifibre brand. It is used at the professional level and is known as a strong performer. I wanted to like this string. Sadly, I could not. The string bed moved around so much that I felt like I was picking a guitar after each point, just trying to realign everything. The feel was very muted and not at all lively. Yes, the racquet was strung properly, but the string was just not for me. I would suggest finding some more reviews on this string before purchasing.


Texas
December 2010
A good one!
4/5
This is a good string. It has power as well as control. The best thing is that it is soft on your hands, unlike Luxilon, so you can enjoy your game without hurting your wrist. The only matter of concern is that it goes dead sooner than some other soft strings and you need to get new strings more often. Altogether, it is the best string I have ever used.


CA
March 2011
Excellent Choice
5/5
Tecnifibre makes a quality and proven product. I use the Biphase in my crosses with Black Code in my mains. Excellent combination for a responsive, controlled feel. I tried an RPM and Xcell combination and various others, and I keep coming back to Tecnifibre.


fl
April 2011
Tecnifibre X-One Biphase 17
5/5
As a USPTA P1 Professional I have used many different strings over the years. This is the best overall string I have ever used with a combination of feel and power second to none.


FL
April 2011
X-ONE BIPHASE 17G
5/5
I was encouraged by the reviews to buy this string. The adjustment to it took 4-5 games but I loved the string so much I ended up purchasing a reel.


FL
June 2011
Tecnifibre X-One Biphase 1.24
5/5
Best string ever, feels like gut. Thanks


GA
July 2011
Tecnifibre X-one Biphase 17g
5/5
One of the best multi I have used. I use it as cross along with Luxilon Flouro 17G. The only issue I have is that it is not very durable as hybrid setup. I can get maybe 5 matches in before it starts to fray and loose the tension. Otherwise, it is a great product.


fl
July 2011
Tecnifibre best string ever
5/5
I've used this string for quite a while. You need to get used to it, but its the best string ever. Now I use the x-one as main and Luxilon rough as cross string, its even more amazing the top spin i get. Thanks for everything. Great service, quick & professional.


Tx
February 2012
The best gut-like feel ever!
5/5
Ive been playing tennis for many years and have tested many different kinds of string brands and hybrid string combos. Although Im well aware that the subject of string choice is a very personal and subjective one, I think the Bi-phase, 17g, offers the closest to natural gut-like feel youll ever find currently in the market. This string offers exceptional control, spin, power and absorbs vibration very well. Additionally, anyone with a propensity to getting tennis elbow, should definitely give this string a try.


CT
April 2012
Solid Multi
5/5
This is a solid multi since it is nice in both feel and power. I strung this in my 10 year old sons racquet for his latest USTA tournament and he really loved it and came back with the win! Im always looking for a string with nice feel and a bit of pop for him and this fits the bill.


CA
May 2012
Technifibre X-One Biphase 17
5/5
Very very nice multi-filament string. Almost as good as natural gut but much less expensive. I like this 17 gauge string full bed or as the softer cross string in a hybrid setup. Outstanding access to power with nice touch, easy on the arm if strung mid tension range. Definitely worth buying.


TX
June 2012
Very powerful!
5/5
Initially, this string had a very stiff feel and provided a lot of control. After about 2-4 hours it softened and became very comfortable and powerful. I plan to continue using it, but will have to either increase the reference tension or combine it with a co-polyester string in a hybrid setup in order to tame its power and get more control.


MS
July 2012
nice
4.66666666667/5
If you are looking for a soft string that had great playability then this is your string. I have tried the polys and do not like how stiff they feel . This string is closest think to natural gut without the price .


NJ
August 2012
Novice
4.66666666667/5
Thanks to Tennis Express Customer Service, I was given the recommendation of these strings and tension and they are durable and powerful with no shock. I love tennis but have not learned much about equipment... thanks to Tennis Express I dont need to waste time figuring out which equipment to choose, they guide me towards the proper choices.


tn
August 2012
X-One
5/5
X-One performs as well as gut with less cost. Lively and easy on the arm, wrist, and shoulder. If you have an orthopedic concern, X-One may be your string.


CA
October 2012
X-One Biphase
4/5
I have loved this string since the first tome that I hit with them. I would this is a very durable and long lasting string. Overall, I give it a thumbs up.


WI
December 2012
X-ONE Biphase 17g is a perfect fit
5/5
Ive searched many years for a string that would match my game. Im a 4.5 player in his 50s. My swing is slowing down a bit, but I hit the ball very flat on the forehand and slice a lot on the backhand. I needed a string that had both the power needed, but also nice touch. The combination of this synthetic string and 17g is perfect. I get about 12 to 15 hard sets out of each set. Feel is great from first set to last. Tension is also very consistent throughout. Wouldnt play anything else at this point. Nice job Technifibre.


Florida
January 2013
Great string with short life....
4.66666666667/5
I put X-One biphase 17g as main at 56 lb with poly cross in my Wilson PS 6.1 95. It provides great ball pocketing, feeling, and comfort. From this, I could manipulate my shots with precise control and power. Unfortunately, its life span is too short; 6 hours. I am a relatively flat hitter and not using heavy spin. A good thing is that string didnt move a lot until it broke.


TX
January 2013
Like hitting will pillows
5/5
This is a great string with great feel, spin and sound. I would continue to use this string if it was a little more durable. 17G only lasted me 5 matches before they broke.


Georgia
January 2013
Birthday present for my wife
5/5
Ordered new raquet and strings from tennis express. Both came very quickly and with no issues. Picked these strings out because of good reviews and she has not been disappointed.


il.
February 2013
X-One Biphase 17g
5/5
Very good strings had my rackets strung with it before - very good for playability and durability will keep on stringing with it....


va
February 2013
biphase
4/5
closest string to gut. Only issue i have...doesnt last long. Frays before gut does.


Mt
March 2013
Soft string
5/5
Good feel and nice on elbow. I have been looking for this Type of string since Head discontinued The Protecter- almost there In feel but not has soft. The best I have found in years.


Texas
March 2013
X-1 Bhphase 17g is Perfect
5/5
Best string I have used since the old VS Gut. Its soft, and gives you amazing touch. I have used NXT for years, but this string is more durable as durable as a 17g multi can be.I would reccomend this to any 4.0/4.5 player who cant use the harsh polys out there for sure!


TX
March 2013
Strings
5/5
I had been playing with Wilson Strings for 17 years and was suggested to try the X -One BiPhase 17 gauge. I play doubles at the National level and love how I can control my drop shots. It is a soft string that gives you spin and lots of control. Thank you tennis express for your knowledge in this department. Love them.


IA
April 2013
X1B is Awesome!
5/5
This continues to be my go-to string; I go full-bed with the X1B. The combination of comfort and power works for my all-court game.


Texas
May 2013
very good
3.66666666667/5
This string has a very good feel. I like it a lot. I do not have a lot of top spin, but after 3-4 weeks I need to replace it. It frays a lot and reminds me of gut.


CA
July 2013
X-ONE BIPHASE TECHNIFIBER 17g
5/5
I found this string to be amazingly responsive to every shot that came its way. The lively feel of the strings feels as though one is actually catching the ball in ones hands. Therefore, the placement is where its meant to be.


Texas
July 2013
Love my strings
5/5
I love my new x- one strings. I was very frustrated with my tennis game. I had a recommendation for some strings & I played with them for a year & was very unhappy thinking it was the level of tennis I was playing & me getting older. I walked into Tennis Express and had a pro & a sales rep at tennis express watch me hit. They both right away analyzed the problem. I had my racket re- Strung with X-One. I have control & my balls are falling deeper of the court instead of short. Looking forward to this season & I will have confident w my strings & they wont let me down. Im a x- one believer!!:


Georgia
August 2013
Bio-phase string purchase
5/5
Purchased the first set because of some reviews I read, great product, good control and power. Will be purchasing more of these.


Florida
December 2013
X one Biphase 17G
5/5
I purchased a new racquet from Tennis Express and wanted the feel of gut in a synthetic string since gut is short lived in southern Florida even in the winter season. Staff at tennis express recommended X-One Biphase. It is perfect for me. Soft with great feel...just like gut! Will be stringing all my racquets with this. Thank you, Jodie


Texas
January 2014
X-one Biphase 17G
5/5
Excellent feel, response, and power. Only down side is that it broke quickly other wise just as good as gut.


Texas
June 2014
Wilson racket
5/5
I am very happy with my new Racket gives me lots of Power.


CA
June 2014
X-ONE STRING
5/5
THE BEST MULTI STRING


FL
September 2014
Soft Multifilament
5/5
Excellent soft multifilament string that has gut - like feel, plenty of power, and is a good choice for players with tennis elbow.


North Carolina
June 2015
Great strings
5/5
Unmatched feel and comfort. It took a few sets to get used to the strings but they feel great.


Ga
October 2015
Closest string to natural gut
5/5
I have arm issues and have used gut string for years. After a bad experience with a gut string unraveling I did some research and found this sting, then thought that I would give it a try...so glad that I did! Both my husband and I love this string...soft, easy on the arm, good power and control and much less expensive than natural gut...very pleased with this product!

Description

No Specs Available.

Product Specs
Characteristic Maximum Playability
Desc1 X-ONE BIPHASE 17G TENNIS STRING NATURAL
Gauge 17
String Length Single Set
String Type Multifilament

TECNIFIBRE

X- One Biphase 17g Tennis String Natural

Buy 4 or more $14.21 per set.

$18.95#XONE17:SET $21.95

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  • Description
  • Customer Reviews
  • Tennis Express Reviews
  • Specs
  • Product Specs
Description

Tecnifibre X-One Biphase 17 provides more spin and power than its 16 gauge counterpart.  The ultimate in synthetic strings, providing the closest playability to natural gut of any synthetic string produced, giving players maximum power, feel, and comfort. Elastyl Fibers are used, giving 12% more power than the standard polyamide materials used in other synthetic strings. X-One Biphase features a unique technology that separates it from other strings in the Tecnifibre line, Fiber H2C, which involves a high temperature prestretching step to ensure greater tension maintenance. Improving on their PU Inside technology, this string features Trimerized PU, allowing for even more comfort and touch for that natural gut like feel. Many years of research have led to the Biphase process, a production process that increases string durability by 20%, letting players experience the benefits of this string for even longer. The most advanced synthetic string on the market, X-One Biphase makes the playability of natural gut available in a synthetic alternative. Also check out the line of Tour-developed Tecnifibre racquets.

Construction: Multifilament polyamide
Color: Natural
Gauge: 1.24mm

Need help selecting a string? Check out our Choosing The Right Tennis String guide for more assistance.

Customer Reviews
Tennis Express Reviews


TX
July 2010
"X-ONE" IS THE ONE FOR ME....
5/5
I have tried alot of the better strings on the market, and by far the X-ONE Biphase is the best string for control, feel and power. I use this string in the mains with a textured poly in the cross for added spin and feel.This product has enlarged the "sweet spot" on my racket, and I am really enjoying the better feel of the 17G, with plenty of durability.


ca
November 2010
Tecnifibre X-One Biphase
5/5
I have been stringing with natural gut for about 3 years now in a hybrid fashion. Someone gave me a package of the Biphase to try and I have become a believer. This string really is as close to natural gut as the company pitches. Try it, Mikey did and he liked it.


CA
November 2010
NOT FOR EVERYONE
2/5
I trust the Tecnifibre brand. It is used at the professional level and is known as a strong performer. I wanted to like this string. Sadly, I could not. The string bed moved around so much that I felt like I was picking a guitar after each point, just trying to realign everything. The feel was very muted and not at all lively. Yes, the racquet was strung properly, but the string was just not for me. I would suggest finding some more reviews on this string before purchasing.


Texas
December 2010
A good one!
4/5
This is a good string. It has power as well as control. The best thing is that it is soft on your hands, unlike Luxilon, so you can enjoy your game without hurting your wrist. The only matter of concern is that it goes dead sooner than some other soft strings and you need to get new strings more often. Altogether, it is the best string I have ever used.


CA
March 2011
Excellent Choice
5/5
Tecnifibre makes a quality and proven product. I use the Biphase in my crosses with Black Code in my mains. Excellent combination for a responsive, controlled feel. I tried an RPM and Xcell combination and various others, and I keep coming back to Tecnifibre.


fl
April 2011
Tecnifibre X-One Biphase 17
5/5
As a USPTA P1 Professional I have used many different strings over the years. This is the best overall string I have ever used with a combination of feel and power second to none.


FL
April 2011
X-ONE BIPHASE 17G
5/5
I was encouraged by the reviews to buy this string. The adjustment to it took 4-5 games but I loved the string so much I ended up purchasing a reel.


FL
June 2011
Tecnifibre X-One Biphase 1.24
5/5
Best string ever, feels like gut. Thanks


GA
July 2011
Tecnifibre X-one Biphase 17g
5/5
One of the best multi I have used. I use it as cross along with Luxilon Flouro 17G. The only issue I have is that it is not very durable as hybrid setup. I can get maybe 5 matches in before it starts to fray and loose the tension. Otherwise, it is a great product.


fl
July 2011
Tecnifibre best string ever
5/5
I've used this string for quite a while. You need to get used to it, but its the best string ever. Now I use the x-one as main and Luxilon rough as cross string, its even more amazing the top spin i get. Thanks for everything. Great service, quick & professional.


Tx
February 2012
The best gut-like feel ever!
5/5
Ive been playing tennis for many years and have tested many different kinds of string brands and hybrid string combos. Although Im well aware that the subject of string choice is a very personal and subjective one, I think the Bi-phase, 17g, offers the closest to natural gut-like feel youll ever find currently in the market. This string offers exceptional control, spin, power and absorbs vibration very well. Additionally, anyone with a propensity to getting tennis elbow, should definitely give this string a try.


CT
April 2012
Solid Multi
5/5
This is a solid multi since it is nice in both feel and power. I strung this in my 10 year old sons racquet for his latest USTA tournament and he really loved it and came back with the win! Im always looking for a string with nice feel and a bit of pop for him and this fits the bill.


CA
May 2012
Technifibre X-One Biphase 17
5/5
Very very nice multi-filament string. Almost as good as natural gut but much less expensive. I like this 17 gauge string full bed or as the softer cross string in a hybrid setup. Outstanding access to power with nice touch, easy on the arm if strung mid tension range. Definitely worth buying.


TX
June 2012
Very powerful!
5/5
Initially, this string had a very stiff feel and provided a lot of control. After about 2-4 hours it softened and became very comfortable and powerful. I plan to continue using it, but will have to either increase the reference tension or combine it with a co-polyester string in a hybrid setup in order to tame its power and get more control.


MS
July 2012
nice
4.66666666667/5
If you are looking for a soft string that had great playability then this is your string. I have tried the polys and do not like how stiff they feel . This string is closest think to natural gut without the price .


NJ
August 2012
Novice
4.66666666667/5
Thanks to Tennis Express Customer Service, I was given the recommendation of these strings and tension and they are durable and powerful with no shock. I love tennis but have not learned much about equipment... thanks to Tennis Express I dont need to waste time figuring out which equipment to choose, they guide me towards the proper choices.


tn
August 2012
X-One
5/5
X-One performs as well as gut with less cost. Lively and easy on the arm, wrist, and shoulder. If you have an orthopedic concern, X-One may be your string.


CA
October 2012
X-One Biphase
4/5
I have loved this string since the first tome that I hit with them. I would this is a very durable and long lasting string. Overall, I give it a thumbs up.


WI
December 2012
X-ONE Biphase 17g is a perfect fit
5/5
Ive searched many years for a string that would match my game. Im a 4.5 player in his 50s. My swing is slowing down a bit, but I hit the ball very flat on the forehand and slice a lot on the backhand. I needed a string that had both the power needed, but also nice touch. The combination of this synthetic string and 17g is perfect. I get about 12 to 15 hard sets out of each set. Feel is great from first set to last. Tension is also very consistent throughout. Wouldnt play anything else at this point. Nice job Technifibre.


Florida
January 2013
Great string with short life....
4.66666666667/5
I put X-One biphase 17g as main at 56 lb with poly cross in my Wilson PS 6.1 95. It provides great ball pocketing, feeling, and comfort. From this, I could manipulate my shots with precise control and power. Unfortunately, its life span is too short; 6 hours. I am a relatively flat hitter and not using heavy spin. A good thing is that string didnt move a lot until it broke.


TX
January 2013
Like hitting will pillows
5/5
This is a great string with great feel, spin and sound. I would continue to use this string if it was a little more durable. 17G only lasted me 5 matches before they broke.


Georgia
January 2013
Birthday present for my wife
5/5
Ordered new raquet and strings from tennis express. Both came very quickly and with no issues. Picked these strings out because of good reviews and she has not been disappointed.


il.
February 2013
X-One Biphase 17g
5/5
Very good strings had my rackets strung with it before - very good for playability and durability will keep on stringing with it....


va
February 2013
biphase
4/5
closest string to gut. Only issue i have...doesnt last long. Frays before gut does.


Mt
March 2013
Soft string
5/5
Good feel and nice on elbow. I have been looking for this Type of string since Head discontinued The Protecter- almost there In feel but not has soft. The best I have found in years.


Texas
March 2013
X-1 Bhphase 17g is Perfect
5/5
Best string I have used since the old VS Gut. Its soft, and gives you amazing touch. I have used NXT for years, but this string is more durable as durable as a 17g multi can be.I would reccomend this to any 4.0/4.5 player who cant use the harsh polys out there for sure!


TX
March 2013
Strings
5/5
I had been playing with Wilson Strings for 17 years and was suggested to try the X -One BiPhase 17 gauge. I play doubles at the National level and love how I can control my drop shots. It is a soft string that gives you spin and lots of control. Thank you tennis express for your knowledge in this department. Love them.


IA
April 2013
X1B is Awesome!
5/5
This continues to be my go-to string; I go full-bed with the X1B. The combination of comfort and power works for my all-court game.


Texas
May 2013
very good
3.66666666667/5
This string has a very good feel. I like it a lot. I do not have a lot of top spin, but after 3-4 weeks I need to replace it. It frays a lot and reminds me of gut.


CA
July 2013
X-ONE BIPHASE TECHNIFIBER 17g
5/5
I found this string to be amazingly responsive to every shot that came its way. The lively feel of the strings feels as though one is actually catching the ball in ones hands. Therefore, the placement is where its meant to be.


Texas
July 2013
Love my strings
5/5
I love my new x- one strings. I was very frustrated with my tennis game. I had a recommendation for some strings & I played with them for a year & was very unhappy thinking it was the level of tennis I was playing & me getting older. I walked into Tennis Express and had a pro & a sales rep at tennis express watch me hit. They both right away analyzed the problem. I had my racket re- Strung with X-One. I have control & my balls are falling deeper of the court instead of short. Looking forward to this season & I will have confident w my strings & they wont let me down. Im a x- one believer!!:


Georgia
August 2013
Bio-phase string purchase
5/5
Purchased the first set because of some reviews I read, great product, good control and power. Will be purchasing more of these.


Florida
December 2013
X one Biphase 17G
5/5
I purchased a new racquet from Tennis Express and wanted the feel of gut in a synthetic string since gut is short lived in southern Florida even in the winter season. Staff at tennis express recommended X-One Biphase. It is perfect for me. Soft with great feel...just like gut! Will be stringing all my racquets with this. Thank you, Jodie


Texas
January 2014
X-one Biphase 17G
5/5
Excellent feel, response, and power. Only down side is that it broke quickly other wise just as good as gut.


Texas
June 2014
Wilson racket
5/5
I am very happy with my new Racket gives me lots of Power.


CA
June 2014
X-ONE STRING
5/5
THE BEST MULTI STRING


FL
September 2014
Soft Multifilament
5/5
Excellent soft multifilament string that has gut - like feel, plenty of power, and is a good choice for players with tennis elbow.


North Carolina
June 2015
Great strings
5/5
Unmatched feel and comfort. It took a few sets to get used to the strings but they feel great.


Ga
October 2015
Closest string to natural gut
5/5
I have arm issues and have used gut string for years. After a bad experience with a gut string unraveling I did some research and found this sting, then thought that I would give it a try...so glad that I did! Both my husband and I love this string...soft, easy on the arm, good power and control and much less expensive than natural gut...very pleased with this product!

Description

No Specs Available.

Product Specs
Characteristic Maximum Playability
Desc1 X-ONE BIPHASE 17G TENNIS STRING NATURAL
Gauge 17
String Length Single Set
String Type Multifilament

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