We often get this question from peope who use BART and the bike shuttle. And I’m happy to say, yes. An Xtracycle fits on both BART elevators (tipped up) and on the bike shuttle. It takes a little finesse to go on Caltrain with an Xtracycle, because it exceeds the 80 inch length limit, and many conductors are strict. City buses can work if you remove the front wheel, and place the hook over the top tube of the bike.