Robin Williams' wheels attracted some high rollin' cycling fans -- including one who paid more than $40,000 for just one of Robin's favorite bikes!
Robin's kids donated 87 of his high-end bicycles -- some custom-made -- for an online auction that closed Tuesday. One lucky bidder even scored a replica of a 10-speed Robin's pal, Lance Armstrong, rode in the Tour de France.
We're told the auction, hosted by Paddle8, drew bids from 25 countries and raised more than $600k. Robin's Master Pista, La Carrera with a custom design from artist Futura 2000 was the biggest ticket item ... going for over $40k.