Materiaalzone 
Fietstoerisme 
Winkans
| 1 | 13.07% | |
| 2 | 9.65% | |
| 3 | 2.00% | |
| 4 | 1.75% | |
| 5 | 1.45% | |
| 6 | 1.06% | |
| 7 | 0.98% | |
| 8 | 0.84% | |
| 9 | 0.84% | |
| 10 | 0.78% |
Modelschatting op basis van renner-ratings en het etappeprofiel.
The stage was neutralized in memory of Wouter Weylandt, who passed away after a serious crash during the third stage.
| Datum | dinsdag 10 mei |
| Start |  Quarto dei Mille |
| Finish | Livorno |
| Afstand | 208.0 km |
Winkans
| 1 | 13.07% | |
| 2 | 9.65% | |
| 3 | 2.00% | |
| 4 | 1.75% | |
| 5 | 1.45% | |
| 6 | 1.06% | |
| 7 | 0.98% | |
| 8 | 0.84% | |
| 9 | 0.84% | |
| 10 | 0.78% |
Modelschatting op basis van renner-ratings en het etappeprofiel.