The T11 creates a very low head position, giving a low centre of gravity and better aerodynamics which helps the taller drivers. The shape and size is the same as the T5 Reverse only with a more laid down seating angle.
This seat has been developed because drivers are getting taller. The high centre of gravity can cause handling problems when the tracks are grippy and covered in rubber. T11 is the 2004 World Champion as used by Davide Fore in his Tonykart Vortex