The real Pro Kennex Ki5 flex rating? TW USA and TW Europe don't agree.

Discussion in 'Racquets' started by KenC, Sep 10, 2012.

  1. KenC

    KenC Professional

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    Having a bit of tendonitis at the elbow, I have been demo'ing a friend's PK 315, the latest model/PJ. Although I don't think it is any more arm friendly than my PSLGTs, I have to say that I like the PK 315 better than my Pure Storm Tours. So, last night I went to TW Europe to pick up a pair and noticed that the flex rating is 67! TW USA reports it as 61 and my arm reports it at closer to 61 than 67. I could definitely notice the frame bending when pounding forehands.

    TW USA:
    http://www.tennis-warehouse.com/ProKennex_Ionic_Ki_5_315/descpageRCPK-KI5N12.html

    TW Europe:
    http://www.tenniswarehouse-europe.com/descpageRC-KI5N.html

    Evidently TW Europe is reporting the unstrung specs. Does stringing influence flex that much, if at all?

    So, I went to the PK site and they are stating the same specs as TW Europe with 67 RA. Is "RA" the same method that TW USA uses?

    So, will the real flex rating please stand up? I will probably listen to my arm and not be afraid to buy this racquet, but being at the beginning stages of TE I have to be careful.
     
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  2. mikeler

    mikeler G.O.A.T.

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    It's funny, I ordered the PK 7G without a demo just because the specs were close to the original PST+. It took just a few swings and I knew that I liked it better. The 7G supposedly has a flex of 66 compared to 62 for the PST+. I did have to increase string tension 4 pounds up to compensate for the additional power but the racket feels more comfortable to me. I don't feel any flex with the 7G which I like.
     
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  3. Ramon

    Ramon Hall of Fame

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    I demoed the Ki 5 head-to-head with the Volkyl Organix 10 325 and the Pacific X Force Pro. The Ki 5 felt a little stiffer to me than both of those racquets, which are rated at 64 and 60. On the Pro Kennex website, it shows a 65 rating for both the Ki 5 and Ki 5x. I think the Ki 5x (which I use) is really just the Ki 5 with a longer handle. I think it does feel like a racquet that's in the mid-to-high 60's, but somehow it seems to be arm-friendlier than that as far as the end result for me.
     
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  4. jorel

    jorel Hall of Fame

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    strung vs unstrung
     
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  5. KenC

    KenC Professional

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    Well, I now have a few good hours in with the latest Ki5 315 and I have to say that the more time I spend with it the more I like it. Previously I would just hit for 10-15 minutes with it to finish an hour, but now I am hitting for at least an hour straight and am now starting to dial it in with my arm and overall game. I must say, I am very impressed with how easy it is to play decent tennis with this frame.

    I still wonder why TW USA reports the flex at 61. It also reports the flex of the PSLGT at 59 but I had 3 of mine measured on a Babolat "analysis" machine and it came up at 62 strung for all 3. Anyway, I think it is always better to go with what the arm feels and take measurements with a grain of salt. For example, some multi's are measured to be soft and elastic, yet play really crisp, i.e. TF X-One.
     
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  6. kybb

    kybb New User

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    I had similal question to TW EU some time ago, but haven't got answer to that YET.
    At the time i had this question the stiffness rating of Ki5 315g in TWEU was listed 71!!!
    http://tt.tennis-warehouse.com/showthread.php?t=420149
     
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  7. KenC

    KenC Professional

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    Interesting. We hear too many times that for touchy elbows we should get low powered, head light, flexy and rather heavy racquets and then string them low with a soft multi or gut. Well, that describes my PSLGTs perfectly, and I got a bit of TE using them (although I am the first to say it's not the racquet's fault in this case, the bonehead user played too much tennis too often without letting the arm fully recover).

    Funny how common wisdom and my recent experience tells me to get a racquet that is more stiff, less head light and less heavy because it is easier on my arm :shock: .

    On paper the PK Ki5 doesn't seem to be the most arm friendly racquet, yet thousands swear by it as the most elbow friendly racquet out there. Maybe, just maybe, this kinetic technology actually works?


    Hmmm... Oh well, I really doubt the racquet is that stiff. I could feel it flexing when pounding forehands, and it seems to feel like it flexes more than my flexy PSLGTs. My stringer has 3 in his shop and I will put them on his racquet analysis machine and report back here.
     
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  8. mikeler

    mikeler G.O.A.T.

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    I have not used the PSLGT but I did try the PSTGT and it was surprisingly stiff compared to the non GT version. I'm a believer in the kinetic technology.
     
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  9. Ramon

    Ramon Hall of Fame

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    The Ki 5 is definitely closer in stiffness to the Pure Storm GT than to the Pure Drive, that's for sure. I don't know about the Pure Storm Limited because I haven't tried it, but I've been told that it's flexy and arm-friendly. It will be interesting to see if the Ki 5 is any better on your arm even though it may not seem that way on paper.

    The Kinetic technology had enough merit to it that the ITF demanded some testing be done on it to make sure it wasn't "cheating" because the racquet had another power source inside it. It was legal, and at the same time, the research showed that it made the racquet more stable and played like a heavier racquet (which would make it more arm-friendly).

    http://www.youtube.com/watch?v=ZHjny9jjTHQ
     
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