Here's why professional cyclists wear helmets
Crash of @DanMartin86 and Richie Porte on the descent. #TDF2017
SERIOUS CRASH:
Australian Richie Porte is taken to hospital after losing control on stage nine of #TDF2017pic.twitter.com/p9Mzcbnejl
When a helmet makes the difference. #TDF2017pic.twitter.com/dSaqSJuzvI
Dan Martin's helmet after today's crashes. Still, he's only 1'44" down on Froome in yellow.https://twitter.com/quickstepteam/status/884071157682581505 …
Without a helmet Dan Martin is knocked unconscious or worse. With helmet he only loses 1 minute 15 seconds. Helmets everyone. #TDF2017https://twitter.com/quickstepteam/status/884071157682581505 …
Hope Porte's ok. But how the hell does Daniel Martin finish ?? He got catapulted into a rock wall ffs
.@DanMartin86 concludes the first week of #TDF2017 in 6th overall! That's incredible, considering what happened earlier today!
Crazy day on @LeTour Remarkably it seems I bounced well and I'm relatively ok. Sure to be sore tomorrow. Best wishes @richie_porte
Not nice arriving at the next hairpin and learning I had no front brake 
Chapeau, Dan. That was a hard bounce! I couldnt believe you popped back on the bike. Tough day but you are still in it!!!
Incredible ride the hardest day of climbing by @DanMartin86 Young fans messaging their hero after 2 crashes @briancanty @bryan7long @LeTourpic.twitter.com/S07PHkyodX
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