Current best odds (June 16th - oddschecker.com) on the favourites are:
Evans 9/4
Valverde 9/2
Menchov 13/2
Cunego 11/1
Andy Schleck 12/1
Sastre 14/1
Gesink 14/1
Rogers 25/1
Anton 28/1
Soler 35/1
Franck Schleck 35/1
Sanchez 40/1
Devolder 40/1
Zubeldia 40/1
Dekker 45/1
Popovych 50/1
Evans 9/4
Valverde 9/2
Menchov 13/2
Cunego 11/1
Andy Schleck 12/1
Sastre 14/1
Gesink 14/1
Rogers 25/1
Anton 28/1
Soler 35/1
Franck Schleck 35/1
Sanchez 40/1
Devolder 40/1
Zubeldia 40/1
Dekker 45/1
Popovych 50/1