Reply by Dirk Zedler, TOUR technology expert and bicycle expert
The assembly of an 11-speed cassette on a wheel of that generation is normally no longer feasible. The cassette body is different in width and shows modified screwings on the lockring. For this reason it will most probably be impossible to provide a firm fit of the SRAM cassette. In this area the road bike technology is considered more and more exhausted, as a consequence of which it is increasingly difficult to combine different components. I think you will be forced to also buy a new wheel, whether you like it or not, to be able to ride an 11-speed gear. The question whether it is possible to replace a driver body by an 11-speed driver body, cannot be answered ad hoc. Most probably, however, such a replacement is no longer reasonable under the economic aspect, because this wheel type is offered at quite favourable prices on the internet whereas spare parts are clearly more expensive.