Cameras caught blood pouring from Craddock's head after the fall but he turned a personal disaster into victory by donating $100 to the velodrome for every stage he finished.
His Instagram followers quickly took up the challenge, and at last count $285,000 has been raised.
Craddock needed a lot of medical attention every day to complete the Tour, while the fundraising kept his spirits up.
"Almost every day presented a new challenged," said Craddock, who finished four and a half hours behind Welsh winner Geraint Thomas.
"The first few days were incredibly painful, it felt like almost every day something added and something taken away, it was a roller coaster of three weeks.
"Without the fundraiser, I probably would have gone home a couple of weeks ago. I drew a lot of motivation from the campaign.
"I started the Tour in tears of sadness when I crashed the first day, but now it's pure joy."