Category Archives: Natural Gut String
Is this a cost effective alternative?
Everyone loves natural gut but not everyone loves the price, even though it is very much worth it!
You may think ” I will just use synthetic gut it must be about as good”. Nope, not even close. However there is string that may be close enough to consider as an alternative.
One such string is IsoSpeed Professional. Because we know “a picture is worth a thousand words” here is a picture:
IsoSpeed v VS Touch
If you are serious about playing tennis at a high level for a long time please consider an alternative to a string that does not help that effort.
This is one, however there are others that we will highlight in future posts.
Madrid Stringing Team!
Say “Hello” to my friends on the Babolat Stringing Team now working the Madrid tournament!
Babolat Stringing Team
Madrid 2025
The team has strung over 3000 racquets so far! The first few days of a major tournament are very busy and while the later days may not as busy it is never boring!
As you can see, Eric, the man in the front is very excited about this team!
Eric and Carine, the lady peaking around the left corner of the picture, enjoy visiting the World Headquarters of Racquet Quest when they can and have been very helpful with new ideas. We use their incredibly accurate testing system several times every day for measuring “tip”and “end” weight of incoming racquets.
FYI, the Wine Map of France is in the World Headquarters of Racquet Quest, LLC, not the Madrid stringing room!
More Linearity
Every string we use and even string we do not use goes through our Questron testing cycle. We have discussed this before, and a video on this site shows the Questron in action. We have updated the Questron significantly since the video was made…and it isn’t quiet.
We want to discuss “linearity” and how it can help when choosing a string setup.
We used these strings recently, and they were not chosen for any reason other than availability.
The first graph shows highly linear strings. The straighter the line from “0” to “fail,” the more linear and consistent the string is throughout its life.
So, what does linearity do for me?
- Maintains tension
- Minimizes energy loss
- Maintains playability
- Maintains consistency
- Maximizes control
- Maintains predictability
- Provides confidence throughout your match
This property is essential to us. That is why we offer an alternative to non-linear strings.
If you would like this information for your favorite string, please let us know, and we will try to provide it for you nd all other readers!
A Long Head Gravity Tour 98
As a high performance racquet technologies business, we have requests for everything imaginable, some not so imaginable! Long racquets are at the top of the list.
Full Custom Head Gravity Tour 98!
Here is a review of a Head Gravity Tour 98 2025 SMU that is 27.75 inches long/70.485cm. See if you can determine which property is most affected by the length.
You can see the string properties here as data taken on our Questron.
| Manufacturer | Head |
|---|---|
| Racquet Model | Head Gravity Tour 98 2025 SMU |
| Reference Tension | 57 |
| String | MonoGut ZX Pro |
| Machine Used | True Tension Pro |
| String Bed Stiffness - RDC | 52 |
| String Bed Stiffness -FlexFour | 61.0 |
| Strig Bed Stiffness - SBS | 50.6 |
| String Bed Stiffness - ERT | 37 |
| Racquet Flex, RDC | 58 |
| Racquet Flex, FlexFour | 43 |
| Racquet - In Plane Stiffness | 429.5 |
| Weight, Grams | 335 |
| Weight, Ounces | 11.82 |
| Balance, mm | 331 |
| Balance, Inch | 13.03 |
| Length, Cm | 70.5 |
| Length, Inch | 27.756 |
| Head Width | 9.86 |
| Head Length | 12.71 |
| Head Area, cm2 | 633.6 |
| Head Area, Sq. Inch | 98.2 |
| Beam Height @ Grip, mm | 21.3 |
| Beam Height @ Mid, mm | 21 |
| Beam Height @ Tip | 21.5 |
| Beam Width @ Grip, mm | 10.5 |
| Beam Width @ Throat, mm | 10.6 |
| Beam Width @ Mid, mm | 10.8 |
| Beam Width @ Tip, mm | 12.2 |
| Number of Main Strings | 16 |
| Number of Cross Strings | 19 |
| Ratio | .650 |
| Main String Grid Inch/mm | 7.72/196.1 |
| Cross String Grid Inch/mm | 10.25/260.4 |
| Density (% of head filled with string) | .785 |
| Average Cross String Space | .546 |
| Average Main String Space | .464 |
| Dynamic Tension, Kp, ERT | 37 |
| Dynamic Tension, Lbs/in | 206.94 |
| First Moment, Nm | .858 |
| Polar Moment | 362 |
| Torsional Stability | 18 |
| Swing Weight, Kg/cm2 | 344 |
| Swing Weight, Ounces | 12.13 |
| Swing Weight Calculated | 367.0 |
| Power, RDC | 49 |
| Control, RDC | 52 |
| Manueverability, RDC | 57 |
| Power, Calculated | 2096.5 |
| Head Points | 6.77 |
| Head Weight, % | 47% |
| Center of Percussion | 21.44 |
| Dwell Time, ms | 6.492 |
| Efective Stiffness - lbs | 27.42 |
| K, Lb/In | 166.67 |
| Recoil Weight | 167.7 |
| Twist Weight | 242.8 |
| End Weight | 131.6 |
| Tip Weight | 202./6 |
| 9 O'Clock | 94.7 |
| 3 O'Clock | 94.9 |
| Butt End | 144.5 |
| COF, Main | .339 |
| COF, Cross | .300 |
Racquet Quest, LLC
