What is the fastest average speed in a team time trial in the Tour de France?

Explanation

The fastest team time trial in the Tour de France was by Discovery Channel in 2005. The team rode the 67.5 km stage Tours-Blois with an 57.324 km/h average. However, the team time trial was not held in the tour from 2006 through 2008. The 2009 Tour De France included a 39 km team time trial.