Richie Porte crashed into a motorbike as the race reached its climax at the top of Mount Ventoux. The incident occurred when a motorbike in front of Ritchie Porte suddenly broke, causing for Porte to go straight into the back of it.
A number of bikes were then involved in a pile up, including yellow jersey holder Froome, who saw his bike damaged.
The two-time champion then got to his feet, found he had no usable machine and decided to run up the hill as he waited for his Team Sky support car to catch up with him. via