Author Archives: RacquetQuest

Head Graphene 360+ Radical MP v21

Well, this is one way to get 2021 of to a great start!  This eye popping Radical will certainly add excitement to your life!

This is truly orange with capitol O!  You simply need to see this racquet to really appreciate the color.

Radical MP v21

But, color aside, this racquet continues the Radical silo of aggressive racquets for the aggressive player, or those that want to be!

This review is the MP which has been one of the most popular models over the years and I am happy to say they have not messed it up as is so often the case when introducing new products!  This is a real Radical racquet!

A couple of things really stand out.  First the string pattern is more dense in the center of the racquet by a small amount which allows for a more open pattern at the periphery for more comfort.

The top eight (8) grommets are on a separate insert and they are “straight” instead of radial.

The addition of “sound grommets” is intended to enhance power via greater string movement. and optimize sound and vibrations.

And the “in plane” stiffness is a little lower meaning the string bed stiffness may be slightly less at the same reference tension, also contributing to comfort.

If you are looking for a high performance tennis racquet that has room for some weight as you require it, this is the one.  If you already need more weight that will be the Radical Pro that will be reviewed next.


Head Graphene 360+ Radical MP V21
Racquet ModelHead Graphene 360+ Radical MP V21
Reference Tension55 lbs - 24.9 k
String: Main/Cross
Victrex 7718
Machine UsedTT Professional
ASPS, FlexFour67
Racquet Flex, RDC63 - After stringing
Racquet Flex, FlexFour50
Weight, Grams315
Weight, Ounces11.11
Balance, mm330
Balance, Inch12.99
Length, Cm68.5
Length, Inch26.968
Head Width9.625
Head Length12.81
Head Area, cm2624.7
Head Area, Sq. Inch96.8
Beam Width, mm, Shaft, Center, Tip20, 23, 21
In Plane Stiffness, Pounds/In382.2 Lbs/In.
In Plane Stiffness, Kg/cm68.3 Kg/cm

Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.633
Main String Grid7.13
Cross String Grid9.31
Density (% of head filled with string).677
Average Cross String Space.484
Average Main String Space.445
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.8
First Moment, Nm.803
Polar Moment330
Torsional Stability17
Swing Weight, Kg/cm2313
Swing Weight, Ounces11.04
Swing Weight Calculated343
Power, RDC46
Control, RDC55
Manueverability, RDC78
Power, Calculated 1909.3
Head Points3.94 (negative = head heavy)
Head Weight, %48.2%
Center of Percussion20.9
Dwell Time, ms, No Swing8.58
Effective Stiffness - lbs29.4
K, Lb/In (SBS) RDC176.28
Recoil Weight148.6
Twist Weight218.8
End Weight125.1
Tip Weight190.7
Total Weight329.2
9 O'Clock96.8
3 O'Clock96.7
Butt Cap120.0
Total Weight313.5


Happy New Year!

I like many of you I am glad 2020 is behind us!

We are looking forward to the new year with great anticipation and resolve to make it a stellar year for all of us!

As we have said in previous posts this is the “You Year!” Let’s make it a happy one filled with great tennis, great friends, and great health for everyone!

Thank you all for making 2020 a great year for Racquet Quest!


Questron Update!

Questron has been operational at the World Headquarters of Racquet Quest for a few weeks and it is time to acknowledge the benefit of having Questron and the ones that made it possible!

Dr, Rich Zarda and Shenghong Zhang are responsible for actually getting it done!  Dr. Zarda was instrumental in determining what need to be tested and Shane actually did the assembly and programming of the UI!  An extraordinary effort by both!

Our good friend JC Carpentier at Tennis machines in St. Louis pitched in with the perfect string connection points which make Questron function in a way that does not stress the string at the connection points.  We want the string to fail (break) in the middle.  Thank you, JC!

So, all I have to do is insert the test string and watch!  The image below is a graph recorded for each string that is tested, and two (2) strings can be overlayed to see the difference between them.

This graph was just pulled at random so you can see the output.

This information is incredibly helpful and will become even more helpful as the database grows.

My sincere thank you to everyone that got this done!



Happy You Year!

Of course, we are all anxious for the new year to get here and erase 2020 from our memory!

We are designating 2021 as the You Year!  So, Happy You Year!

For the last few years Racquet Quest, LLC has put more emphasis on “custom racquets” and 2021 will see this emphasis extended to “you racquets”!

What exactly does “you racquets” mean?  It simply means that every racquet that leaves Racquet Quest, LLC is set up for your style of play and personal specifications.  Yes, even if the racquet is Off-the-Shelf and not a full custom!

This is the year of “you”! Happy You Year!

Many really good things are happening next year and we are glad you are going to be with us!




A Rarity …Continued

It is fun to have these fairly rare racquets to work on and get back into playing condition!  We will report on each of them as we go through the setup procedure, and note any differences that we find.

We will try to compare some of the specifications to current or “recently current” racquets to see how far we have come…or not!

A few things stand out right away:

  • The racquet is nearly 28 inches long (71.1cm)
  • The racquet is very flexible in (RDC48) and out (285.7) of plane
  • The racquet has a straight thin (21mm) beam
  • The racquet is (was) made in Austria

Head Radical Tour OS - Austria 
Racquet ModelHead Radical Tour OS - Austria
Reference Tension58 lbs - 26.3 k
String: Main/Cross
Machine UsedTT Professional
ASPS, FlexFour63
Racquet Flex, RDC48 - After stringing
Racquet Flex, FlexFour44
Weight, Grams352
Weight, Ounces12.42
Balance, mm329
Balance, Inch12.95
Length, Cm71.1
Length, Inch27.992
Head Width10.23
Head Length13.43
Head Area, cm2695.9
Head Area, Sq. Inch107.9
Beam Width, mm, Shaft, Center, Tip21, 21, 21
In Plane Stiffness, Pounds/In285.7 Lbs/In.
In Plane Stiffness, Kg/cm51.1 Kg/cm
Number of Main Strings18
Number of Cross Strings19
Ratio Cross/Mains.721
Main String Grid7.81
Cross String Grid10.12
Density (% of head filled with string).733
Average Cross String Space.533
Average Main String Space.434
Dynamic Tension, Kp, ERT37
Dynamic Tension, Lbs/in206.94
First Moment, Nm.894
Polar Moment389
Torsional Stability20
Swing Weight, Kg/cm2369
Swing Weight, Ounces13.03
Swing Weight Calculated381
Power, RDC36
Control, RDC66
Manueverability, RDC41
Power, Calculated 2063.3
Head Points8.35 (negative = head heavy)
Head Weight, %46.3%
Center of Percussion22.0
Dwell Time, ms, No Swing7.96
Effective Stiffness - lbs27.4
K, Lb/In (SBS) RDC205.13
Recoil Weight186.9
Twist Weight273.6
End Weight139.3
Tip Weight213.3
Total Weight352.6
9 O'Clock106.3
3 O'Clock106.0
Butt Cap140.7
Total Weight353