The [K]One.FX is the flagship racquet in Wilson's game-improvement [K] Factor lineup. It has several of the [K] features, including the "Karophite black" frame construction, which improves the resilience of the graphite and silicon-dioxide frame. Certain regions of the frame are stiffer to improve durability and control against torsional forces, and the strings have wide-diameter grommet holes, which allow for more flexibility and a smooth-feeling swing. It also features the "[K]ompact Center" which increases control and precision. This racquet is 10 points head-heavy and has a large, 122" head with overall length of 27.5". It is lighter and more powerful than the other [K] game improvement models.
- "[K]arophite Black" frame material
- Compact center
- 9.3 oz. (strung)
- Balance: 10 pts. HH
- Double-sized grommet holes
- "[K]ontour Yoke" added frame stiffness
- 30 mm dual-taper beam cross-section
- Length 27.5"
- Headsize 122"