David Zabriskie broke his wrist on Sunday. He was also attempting to become the first vegan to complete the tour. I cant help think a little more calcium would have helped David. Johnny H probably eats raw meat. No forget that.....
You dont get weak bones from being a vegan, if you eat the right balance you could in theory have more energy and stamina than those who eat meat
Depends on the vegan, I know vegans who would probably snap in two if they fell off a bike but by the same token I know vegans who would probably dent the tarmac.
I'd imagine a pro-cyclist taking on the tour has his diet well sorted regardless of being a Vegan or vegetarian or whatever.