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A fake Wilson K 6.1 Tour 90 analysed

Photos and information on a
Fake Wilson K Factor KSix-One Tour 90
This early fake is based on the early production run - it has (K)ARBON rather than (K)arophite Black, which was changed due to copyright issues. The shape of the frame resembles a K90 with "wings" in the throat and PWS in the hoop. However cosmetically it is very poor and more recent fakes are more realistic, for example with a brown leather grip.
The length, width and other measurements of the frame seem quite accurate. At a distance the racket looks quite good cosmetically.
However the red was quite dull and all the colours seemed flat compared to an authentic racket.
When you run your finger over the frame, it feels powdery, and you can feel a slight bump where the colours change.
Notice the yellow Wilson Truegrip, rather than a brown leather grip. The grip was shrink wrapped so it is not a replacement/overgrip.
This racket should be:
Unstrung weight: 340g 12.0 oz 
Balance: 12pts Head Light (8pts = 1 inch from mid point)
305mm from the end of the handle.
Strung weight: 354g 12.5 oz 
Balance: 9pts Head Light
315mm from the end of the handle.
This fake racket was 298g, so it would be very light even for the Asian 320g version. It was noticeably head heavy.
Note that production quality is not perfect and Wilson have their own acceptable design tolerances, so you are likely to find small differences even in genuine rackets, unless you buy a matched pair. Fake paintwork is very prone to flaking, but authentic rackets show a lot of chips and cracks too.
  • The racket no longer comes with a cover.
  • The card insert is in 2 pieces now, where before it was one.
  • The "Made in China" text has been promoted to a more prominent position on the inside of the yoke, below "Designed in the USA", whereas before it was tucked away at the bottom of the head.
  • Latest rackets have a hologram that cannot be peeled back, whereas older frames had labels with "Not For Resale Hologram Missing" underneath.
  • Very early rackets may have (K)arbon rather than (K)arophite Black. 


The hologram is not a sticker, but is printed on the frame. I saw an authentic racket on 12.03.09 in an authorised dealer where the hologram was not a sticker, so maybe Wilson have stopped using stickers. I have a new version frame at home where the hologram is a sticker, that can be peeled off to reveal "Not For Resale Hologram Missing." So the hologram may or may not be a sticker, depending on age. The lettering on this hologram seemed very flat.
The ® register mark is slightly misplaced and is not printed on a flat surface.
The grommet strip does not fit flush to the unstrung frame.
"Made in China" is noticeably wobbly. On later versions it is printed on the inside of the throat, under WILSON.COM DESIGNED IN THE USA. I guess these days everyone knows these rackets are made in China, so Wilson don't try to hide the label anymore.
The information about the racket specifications looks quite good, and many sellers provide a photo of it.
However, the weight reads 12 oz. rather than 12.0 oz. I presume the maker did not understand if O was alpha or numeric, as if they were unfamiliar with ounces/oz.
The Wilson logo is wrongly positioned.
There should be more white space below.
The text is slightly too small.
The grommet strip surfaces are not flat, but are bevelled. The [W] logo looks accurate.
This grommet strip has Wilsontennis.com, unlike my authentic rackets.
You can see the curve of the surfaces here, when they should be quite flat.
The earliest KFactors were branded (K)ARBON, not (K)AROPHITE. The name was changed due to a copyright issue. So you may find an early authentic racket with (K)ARBON.
Notice how the lettering of BLACK curves away and is not straight.
Also the positioning is slightly too low.
The red dot marking the centre of the frame is missing - should be next to the letter C.
Also see how the paintwork is very poor/flaking near the string holes.
Paintwork can flake on originals, but this scraped off easily with my nail.
Again poor quality paintwork, very noticeable near the holes.
Wilson butt ends pop off easily, so you can add a little weight. Just put something thin in the small hole.. and flick the cap off - don't worry they pop back on again perfectly, no glue required!
You should see the carbon frame and 2 ovals filled with a yellowish material. Not just a big hole. No wonder the frame feels so light!
The grip size should be printed on the flat surface lying under the butt end and there should also be a code eg GKW.
Under the grip it should be a yellow material.
There should be a small circle where the material has been injected into the frame.
There should be some lettering "engraved" into the handle for example GR115.
The butt cap should have a small flap which you can tuck the end of the grip under. 
This frame was supposed to be a grip 4, according to the barcode on the polythene bag.
There was no small sticker on the frame giving the grip size.
The grip was tiny, perhaps even a size 2.
At a distance the cover looks ok, but the white stripes are too short.
The latest KFactor 90s do not come with a cover, so if you see one for sale with a cover, it may be genuine but old stock.
The colour/dye rubbbed off very easily. The weave of the fabric is quite coarse.
Early versions had a single piece insert. The elastic here is white, rather than black, and the lettering/indentations seemed deeper than on early authentic rackets. I have seen fakes with black elastic/stiring.
Recent version have 2 card inserts rather than just one, but you may see some older authentic frames with just one insert.
The vibration dampener was white, not 2 coloured, and came in a small packet attached to the frame. Newer rackets come with the dampener on the grip, under the shrink wrap, but you may see some older authentic rackets with the dampener in a bag.
The last Wilson UK representative looked up the barcode for me and found it was for Federer's old NCode frame, so I guess there are some fakes of those floating around too.