Category Archives: Pro Stock

Head Speed Pro Black

As you probably know by now Novak Djokovic plays with a version of the Head Speed but in black, not black and white! So it was only a matter of time until the all-black Speed Pro became available.

Until now we only had the black and white Speed Pro demo but now we have the black one!

This review will include the white and black version of the Speed and we will include a comparison to the Wilson Blade Pro!

These are each extraordinary racquets!  You will discover subtle differences in the specifications, especially the Wilson Blade Pro being a 16×19 pattern and the Head Speed Pro, in this case, is 18×20.  The geometry and frame of the 16×19 and 18×20 are the same so the numbers are meaningful!

 

ManufacturerHead
Racquet ModelHead Graphene 360 + Speed Pro Black
Reference Tension54 lbs - 24.5 kg
String
Head Reflex MLT
Machine UsedTrue Tension Professional
Static
ASPS, RDC56
ASPS, FlexFour66.5
Racquet Flex, RDC57 - After stringing
Racquet Flex, FlexFour50.5
Racquet - In Plane Stiffness325.2 lbs/Inch
Weight, Grams334
Weight, Ounces11.78

Balance, mm325
Balance, Inch12.80
Length, Cm68.6
Length, Inch27.008
Head Width9.618
Head Length13.10
Head Area, cm2636.1
Head Area, Sq. Inch98.6
Number of Main Strings18
Number of Cross Strings20
Ratio Cross/Mains.662
Main String Grid7.565
Cross String Grid10.30
Density (% of head filled with string).7735
Average Cross String Space.513
Average Main String Space.413
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.7
First Moment, Nm.836
Polar Moment341
Torsional Stability15
Swing Weight, Kg/cm2326
Swing Weight, Ounces11.50
Swing Weight Calculated352.8
Power, RDC42
Control, RDC59
Manueverability, RDC69
Power, Calculated 1832.1
Head Points5.51
Head Weight, %47.0%
Center of Percussion21.016
Dwell Time, ms8.502
Efective Stiffness - lbs28.25
K, Lb/In179.49
Recoil Weight159.3
Twist Weight231.4
End Weight 134.5
Tip Weight 198.0
9 O'Clock99.0
3 O'Clock99.6
Butt Cap134.0

 

And now for the white and black version:

ManufacturerHead
Racquet ModelHead Graphene 360+ Speed Pro
Reference Tension56 lbs - 25.4 kg
String
Victrex PEEK fiber Experimental 7718
Machine UsedTrue Tension Professional
Static
ASPS, RDC55
ASPS, FlexFour66.5
Racquet Flex, RDC60 - After stringing
Racquet Flex, FlexFour43
Weight, Grams327
Weight, Ounces11.53
Balance, mm323
Balance, Inch12.72
Length, Cm68.5
Length, Inch26.97
Head Width9.69
Head Length13.06
Head Area, cm2641.2
Head Area, Sq. Inch99.4
Beam Width, mm, Shaft, Center, Tip23, 23, 23
In Plane Stiffness, Pounds/In335.2 Lbs/In.
In Plane Stiffness, Kg/cm 152.0 Kg/cm
Number of Main Strings18
Number of Cross Strings20
Ratio Cross/Mains.668
Main String Grid7.62
Cross String Grid10.37
Density (% of head filled with string).768
Average Cross String Space.513
Average Main String Space.414
Dynamic
Dynamic Tension, Kp, ERT37
Dynamic Tension, Lbs/in206.94
First Moment, Nm.812
Polar Moment336
Torsional Stability16
Swing Weight, Kg/cm2320
Swing Weight, Ounces11.29
Swing Weight Calculated341.2
Power, RDC45
Control, RDC57
Manueverability, RDC73
Power, Calculated 1908.2
Head Points6.14 (negative = head heavy
Head Weight, %47.2%
Center of Percussion21.2
Dwell Time, ms, No Swing8.58
Efective Stiffness - lbs28.7
K, Lb/In (SBS) RDC176.28
Recoil Weight159.71
Twist Weight229.85
End Weight 133.4
Tip Weight 192.8
9 O'Clock97.1
3 O'Clock97.5
Butt Cap131.0
This Wilson Blade Pro was not strung by Racquet Quest. The specifications are included as a comparison only…not a string recommendation.

And now for the Wilson Blade Pro:

ManufacturerWilson
Racquet ModelWilson Blade Pro
Reference Tension54 lbs - 23.6 k2
String
ALU Power Rough
Machine UsedUnknown
Static
ASPS, RDC35
ASPS, FlexFour53
Racquet Flex, RDC62 - After stringing
Racquet Flex, FlexFour48
Racquet - In Plane Stiffness387.1 lbs/Inch
Weight, Grams337
Weight, Ounces11.89
Balance, mm327
Balance, Inch12.87
Length, Cm68.6
Length, Inch27.008
Head Width9.6
Head Length12.80
Head Area, cm2623.3
Head Area, Sq. Inch96.6
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.634
Main String Grid7.37
Cross String Grid10.40
Density (% of head filled with string).7934
Average Cross String Space.547
Average Main String Space.461
Dynamic
Dynamic Tension, Kp, ERT27
Dynamic Tension, Lbs/in151.0
First Moment, Nm.850
Polar Moment358
Torsional Stability16
Swing Weight, Kg/cm2342
Swing Weight, Ounces12.06
Swing Weight Calculated360.35
Power, RDC55
Control, RDC42
Manueverability, RDC59
Power, Calculated 2069.0
Head Points5.04
Head Weight, %47.07
Center of Percussion21.535
Dwell Time, ms10.755
Efective Stiffness - lbs22.37
K, Lb/In112.18
Recoil Weight170.8
Twist Weight234.0
End Weight 135.0
Tip Weight 202.9
9 O'Clock100.8
3 O'Clock103.7
Butt Cap132.2

Which Comes First!

We all have heard the question “which comes first the chicken or the egg”?  However, my question is “Which comes first the game or the string”?

I believe they happen simultaneously.  But first a quick story.

In 2005 I was attending a Head product introduction on the island of Mallorca, Spain,  Yes, that one!

The product introduction was exciting but what I am going to tell you about now was even more meaningful.

The Director of one of the top US Tennis Training organizations, at that time, was there and we were discussing teaching techniques and what he said after being in this part of Europe was “we need to start teaching our players how to hit this way!”  Well, “this way” was the way of low-powered strings that were popular in Europe but not so much in the US, yet.

So, it began!  The players could not hit harder, like the Europeans, unless they used the same string material as the Europeans and that was very stiff and mostly PET polyester.

So, the idea was the “egg” and the string was the “chicken”, sort of!  I guess the feeling was that “if Americans are going to compete we must use the same equipment”.

Our history confirms that almost no one plays better with stiff string and durability is suffering!

Now, I believe the professional game can go on about its way but otherwise, we need to consider changing the game by returning to a combination of comfort and playability.

Our history shows us that the “high performance” life span of many polyester strings is about 2-3 hours, or less, maybe about 10-12 games.  We don’t believe this is quite long enough for most players.  But, how do you quantify “performance”?  It may be different things for different players.

There are many components to performance but what if it was associated with UTR data?  Racquet Quest can track UTR numbers and make some determinations based on that data.  If a UTR is stable or increasing it is a good bet that the performance of the player and equipment is OK.  However, if the UTR is slipping it is a good indication that something is not working as it should…but what?

We have found that, in some cases, it is injury or discomfort, that is causing the slippage!  Stop it!  The following data is for a 12 month period and acquired from the UTR website.  Even small positive changes are tough!  But negative changes seem to have an enormous impact more quickly than positive changes!

For example:

PlayerRacquetStringUTR1UTR2Delta
AHead Speed PEEK12.8412.86+ .02
BBabolat Pure AeroPolyester10.919.56-1.35
CHead Radical MPAPEEK4.505.61+1.11
DWilson Pro Staff 97PEEK5.07.03+2.03
EBabolat Pure AeroPEEK3.85.64+1.84
FWilson Blade 98 Polyester10.09.41-.59
GHead Radical ProNatural Gut3.75.15+1.45

This information is provided as a small sample comparison instrument and is not intended to pry anyone away from their favorite setup!  Even if it hurts!

 

 

 

 

Bolt 100 v2

Bolt tennis racquets have been around for a few years and we have reported on them in the past, however, the new V2 of the Bolt racquet lineup is very impressive!

If you are not at all familiar with the Bolt technology it is the “Zip Strip” that makes them unique.  The “Zip Strip” is a carbon fiber component that looks like a miniature tennis racquet cross-section that fits into the sides and top that actually do the “bending” during string and racquet impact!

This “bending” can mitigate harshness associated with very stiff strings or a very stiff racquet!

Arm problems are no match for the ZipStrips!

Before we look at the specifications you can visit the Bolt site for more information.

Bolt 98L, V2 
ManufacturerBolt
Racquet ModelBolt 100, v2
Reference Tension57 lbs - 25.9 k
String: Main/Cross
Head Reflex
Machine UsedTrue Tension Pro
Static
ASPS, RDC56
ASPS, FlexFour64.5
Racquet Flex, RDC64 - After stringing
Racquet Flex, FlexFour46
Weight, Grams313
Weight, Ounces11.06
Balance, mm337
Balance, Inch13.27
Length, Cm68.5
Length, Inch26.98
Head Width9.589
Head Length13.13
Head Area, cm2665.1
Head Area, Sq. Inch103.1
Beam Width, mm, Shaft, Center, Tip24.5, 24.5, 23.8
In Plane Stiffness, Pounds/In454 Lbs/In.
In Plane Stiffness, Kg/cm178.7 Kg/cm
Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.642
Main String Grid7.37
Cross String Grid9.62
Density (% of head filled with string).688
Average Cross String Space.506
Average Main String Space.461
Dynamic
Dynamic Tension, Kp, ERT36
Dynamic Tension, Lbs/in201.35
First Moment, Nm.822
Polar Moment350
Torsional Stability19
Swing Weight, Kg/cm2331
Swing Weight, Ounces11.68
Swing Weight Calculated356.6
Power, RDC48
Control, RDC53
Manueverability, RDC66
Power, Calculated 2183.7
Head Points1.42 (negative = head heavy)
Head Weight, %49.3%
Center of Percussion21.4
Dwell Time, ms, No Swing8.50
Effective Stiffness - lbs29.9
K, Lb/In (SBS) RDC179.49
Recoil Weight157.0
Twist Weight234.11
End Weight118.7
Tip Weight196.1
Total Weight314.8
9 O'Clock103.0
3 O'Clock98.9
Butt Cap110.3
Total Weight312.2

 

 

 

Head Graphene 360+ Radical Pro v21

As you would expect the Radical Pro is the heaviest of the Radical Series, but only by a few grams!  What!  When we talk about grams to some players it might as well be angstroms or something like that.  What the heck is a gram?  For many in the US market is still “Talk to me in ounces, please!”

OK, there are 454 grams in a pound and 16 ounces in a pound.  If I said a racquet weighs 285 grams what would you think?  Or, if I said the racquet weighs 10 ounces which sounds better if you are weight averse?

A cup of coffee weighs over 500 grams!

OK, the Radical Pro weighs 13 grams more than the Radical MP so how many ounces is that?

Enough of this stuff!  However, it is important to know what weight is and how it can be a significant factor in your playing.  Weight is your friend!

As you will see in the following specifications a lot depends on how the weight is distributed throughout the racquet.

Head Graphene 360+ Radical Pro

Here is a little hint; take a look at the swing weight of the MP and the Pro and tell me what you see.

The Radical Pro has the “sound grommets’ and the “control pattern” for those concerned with string spacing, and that should be many of you.  String spacing can have a profound affect on durability and playability.

The enlarged circle was intended to show the elongated grommets which allow the string to move and effectively be a little longer meaning more energy return.

Head Graphene 360+ Radical Pro v21
ManufacturerHead
Racquet ModelHead Graphene 360+ Radical Pro v21
Reference Tension55 lbs - 24.9 k
String: Main/Cross
Victrex 7718
Machine UsedTT Professional
Static
ASPS, RDC54
ASPS, FlexFour63.5
Racquet Flex, RDC63 - After stringing
Racquet Flex, FlexFour53
Weight, Grams328
Weight, Ounces11.57
Balance, mm321
Balance, Inch12.64
Length, Cm68.5
Length, Inch26.968
Head Width9.627
Head Length12.80
Head Area, cm2624.3
Head Area, Sq. Inch96.8
Beam Width, mm, Shaft, Center, Tip20, 23, 21
In Plane Stiffness, Pounds/In400.0 Lbs/In.
In Plane Stiffness, Kg/cm71.5 Kg/cm

Number of Main Strings16
Number of Cross Strings19
Ratio Cross/Mains.633
Main String Grid7.25
Cross String Grid9.40
Density (% of head filled with string).688
Average Cross String Space.490
Average Main String Space.445
Dynamic
Dynamic Tension, Kp, ERT35
Dynamic Tension, Lbs/in195.8
First Moment, Nm.808
Polar Moment324
Torsional Stability14
Swing Weight, Kg/cm2310
Swing Weight, Ounces10.93
Swing Weight Calculated338
Power, RDC47
Control, RDC54
Manueverability, RDC80
Power, Calculated 1889.7
Head Points6.77 (negative = head heavy)
Head Weight, %46.9%
Center of Percussion20.8
Dwell Time, ms, No Swing8.66
Effective Stiffness - lbs29.1
K, Lb/In (SBS) RDC173.06
Recoil Weight152.11
Twist Weight227.78
End Weight136.1
Tip Weight191.5
Total Weight327.6
9 O'Clock98.8
3 O'Clock97.5
Butt Cap131.3
Total Weight327.6

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!