I used to ride the bus when i had my old Kona and my front fork and brakes got damaged from that arm that comes up and holds the front wheel. The rack was full on that bus though and from what i remember it was a pretty bumpy ride. I didn't notice the damage till a couple of days later when i noticed my front brake rubbing. I think most of the damage came from the adjacent bikes pushing against eachother. Anyway, i ended up just getting a new fork and selling that bike. Now i just ride my bike the whole commute and don't worry about catching the bus.