Yes this is pro, but related to the discussion a few pages back:
Changing bike/stuff. Getting more common.

Also how it is done. Give your preferred equipment to a teammate and swap.
"The race leader stopped to take a wheel from Ivan Basso on the first descent from Aprica"

Contador -"The changes depend on how the stage unfolds. We can use different type of tubulars, bearings or even stiffer wheels. These are solutions that over 30-40km can give a slight advantage. "
http://www.cyclingnews.com/news/uci-checks-bikes-of-contador-hesjedal-and-gilbert-for-motors-at-giro-ditalia