JB says...
[K]factor is the combination of many different components working together within the racquet. Wilson claims these new technologies are going to revolutionize control in the game of tennis. World #1 Roger Federer contributed some invaluable input concerning the design and performance of these frames. The [K]four 105 is new territory for Wilson's "4" line. Never before have they offered a medium powered, nearly even balanced racquet like this one. The result is a very maneuverable head combined with a nice amount of power. | Specifications for:
Wilson [K]four 105
| Headsize | 105 sq. inches | | Length | 27.25 inches | | Strung Weight | 10.1 ounces | | Balance | .2 inches Head heavy | | Stiffness | 73 RDC | | Power Level | medium | | Swing Weight | 322 RDC | | Cover Included? | yes |
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