VIDEO: Froome runs up Ventoux after TDF crash

Absurd, impossible, never seen before. That's how BBC Radio 5 reacted to the vision of Chris Froome sprinting up Mont Ventoux after he was forced to ditch his bike after crashing into a moto rider.

A group of three riders, led by Ritchie Porte and also including Bauke Mollena, crashed into the motorbike after it stopped because the course was blocked by crowds. The incident has led to calls for a review of crowd control measures on the Tour. 

Froome's Pinarello Dogma F8 suffered a snapped seat stay in the crash, forcing the yellow jersey holder to run up the mountain while he waited for his team car to provide another bike. Mavic neutral service turned up with an emergency bike for Froome to ride the 500 metres to the finish but it was too small and when Mikel Landa arrived at his teammate, he did not hand over his bike.

Froome finally received a third bike from his Team Car and finished one minute and 40 seconds behind Mollema and 44 seconds behind Porte, but all three were eventually given the same time.

After a review Froome retained the Yellow Jersey.

The stage was won by Thomas de Gendt from Belgium.

Speaking to the BBC after the race, Richie Porte, riding for BMC, said: "The crowd were all over the road and it was such a mess.

"I don't know what they're going to do but they're going to have to do something about it. That can't stand, some sort of discretion has to be used.

"It was just crazy."

Froome did not appear to break UCI rules because he crossed the line on a bike. A cyclist can even run over the finish but must have a bike with him.