2007-Roger Federer's New Wilson Racket

It's called the 'K Factor' but no further official details are yet availble. Not sure whether it's just a new paintjob.The current one is nCode 90 although someone says that's not even true.

According to a fan named Johnny:
To the individual that thinks he plays with the old Pro Staff with a paint job this is incorrent. He does play with an Ncode original racquet. There is a difference with the grommet holes being wider apart than the retail version, as well Roger's racquet has a compartment the opens the butt and allows him to add or remove tiny weights depending on which surface he plays on.This is confirmed with his personal stringer for his racquets.
As you can see on the PWS section his current racket has 4 gommet holes. The current Ncode 90 has 5 holes at the PWS. Rogers preferred specs are wider spacing 4 gommet holes and he has already been playing with for years.. If you notice the NEW K Factor racquet also has 4 gommet holes. It is more the consumer that will be changing to his preferred string pattern which will result in more spin with less effort and better control. As for the K in the racquet Im not very certain as to the meaning for that could be for more kevlar or perhaps more Carbon. As for the string tension Roger used 48.5 pounds on mains and 45 pounds on crosses. Wilson natural gut on mains and Luxilon Big Banger Alu Power on the crosses. A picture from his stringer at a tournament clearly shows his preferences. Hope this helps everyone.

K factor:

cCode:

comparation:

Racket in Roger's hand:

String tension: