You need to see this!
For years, we have been exploring the properties of materials that make up many of the tennis strings used by players now.
What we found, over fifteen (15) years ago, was that polyetherether ketone (PEEK) is the best string material for preventing arm, elbow, shoulder, and other injuries while enhancing performance.
What!
We love natural gut and use a lot of it; however, PEEK can take more “abuse” than natural gut, environmentally.
If you are joining the Racquet Quest community, you may be perplexed by this statement. And for good reason. If you are not near the world headquarters of Racquet Quest, LLC, you may have never heard of PEEK, marketed by Ashaway as MonoGut ZX and ZX Pro.
Why?
PEEK is a unique fiber that requires an understanding of its properties, unlike most other materials that do not possess the performance properties of PEEK.
Stringing with PEEK requires caring about the player and the racquet!
Jason’s Two (2) month old PEEK 17 gauge!
Previous stringing date: 8.3.25
This is an un-retouched photo of Jason’s Wilson’s RF 01 Pro after many hours of rigorous hitting.
String bed stiffness loss…17.7%!
You need to see this!
Ask your racquet technician to set up your racquet with this string. We believe you will be glad you did.
Posted on October 15, 2025 Wed, in Ashaway MonoGut ZX, elbow, Good News!, PEEK, Players, String, Tension. Bookmark the permalink. 2 Comments.
Racquet Quest, LLC
Jason, thank you for the comment! This string is phenomenal and has become our most popular string.
After a prolonged break from the game I was looking for a string that would be comfortable to use and would minimize any risk of injury. This string not only allowed that, but it provided more playability than any of the other strings I was testing. I find this string pockets the ball, almost like natural gut. It provides incredible touch at the net and on slice backhands, but can also give big ‘pop’ and can grip the ball for aggressive topspin baseliners. The same advantages are there for the serve, with the option to hit a flat bomb, or a heavy kick. The string also has the potential to last a long time with very little loss of playability. Overall an extremely high performance string which is easy on the arm.