"Love the low powered feel - it gives me full confidence to hit out on the ball!

New generation, low-powered co-polyester/monofilament string. Ideal for players who like to make their own power and ask for added durability. The hexagonal string structure and Tru Recoil offer players with high racquet speed access to superior spin potential.

Who should try the string?

  • Players who are used to playing with co-poly strings.
  • Players who are looking for low-powered playing experience.
  • Playing level 5.0-7.0 NTRP, college players, ITF players, etc... (advanced - high performance level), UTR 9-16+
  • High level junior players from age 16 and up

Please note that 17g and 18g strings are currently only available via special request and there is no current estimation available on fulfilment of such a request.

  String Characteristics:





Tension Stability

Spin Potential


  String Specifications:

String Name: Durafluxx

Gauges: 16g (1.28mm). 17g (1.23mm), 18g (1.18mm)

Length: Sets: 12.2mm/40ft, Reels: 200m/656ft

Color: Silver

MRP Rs.11,999

Rs. 5999

MRP Rs. 799

Rs. 499

Official Product Reviews:

The right string for me.

"At first it was difficult to wrap my head around the unique feeling of the string. It felt soft (I like to string my polys at around 52 lbs) but not lively. I was surprised how well I was able to control my aggressive groundstrokes and the amount of spin I was able to generate. I play the 16 gauge and as the string name Durafluxx already describes - exceptional durability for a big hitter like me."


Perfect for College.

"I play D1 college and my coach just bought a couple of reels of Durafluxx 16g from you. He told me to give you guys some feedback on this string. First, I have to say I never played a string that felt that way. It did not give me the usual crisp sound that I am used to playing with poly. It rather had a more muted sound to it. Although I was not used to the low powered feeling of the string the overall performance was exceptional. Great control and ball pocketing. It really allowed me to take full cuts on the ball without ever having the feeling of hitting the ball too deep. Durability was better of what I am used from other polys we usually play. I would definitely recommend this string to any player who breaks strings and likes to take big cuts on the ball!"


Will get a reel.

"YES, thanks Tier One for sending me a sample of Durafluxx 16 g. Awesome string. It performed exactly as described on the package. Great control and durability, nice recoil which I very much like in a poly. Stringing was easy and for $9 a set I will be a buyer."


Who are we?

We are a business specializing in high quality tennis strings. Our mission is to offer those products at affordable prices. We can only do so by running a cost efficient business which includes not paying outrageous marketing expenses to elite tennis players to advertise our strings.  Our growth rather comes from hundreds of positive posts and reviews at accredited tennis forums. We highly value the feedback from those tennis enthusiasts who validate the quality of our products daily.

Why Tier One Sports?

Tennis String Innovation:  

Our production team was able to develop a co-polyester compound that is superior in tension stability and string stiffness to most poly strings in the tennis industry.

Qualitative Lab Test Results Do Matter:

There are 2 fundamental factors that build a foundation for the quality of a co-polyester string: tension stability and string stiffness.  Having tested a great variety of strings from our competitors, we recognized the very limited number of strings on the market that perform well in both areas. Either the string is overly stiff or loses tension too quickly. 

Bob Patterson from the USRSA (United States Racquet Stringers Association) provides their readers with a comprehensive list of tennis string lab test results for string stiffness and tension stability. Bob was kind enough to test all Tier One Sports strings as well.

To offer some insight into the quality of our strings we made sure to compare them to some of the "best", well known strings in the industry!

  Tier One Sports Durafluxx:

  1.   ~ Durafluxx 17g: String Stiffness: 231 (lbs/in), Tension Loss: 15.67 (lbs)

  String Competitors:

  1.  ~ Babolat RPM Blast© 16g: String Stiffness: 280 (lbs/in), Tension Loss: 17.37 (lbs)
  2.  ~ Luxilon 4g© 130: String Stiffness : 269 (lbs/in), Tension Loss: 13.74 (lbs)
  3.  ~ Tecnifibre Black Code© 16g: String Stiffness: 242 (lbs/in), Tension Loss: 18.08 (lbs)