What kind of front rack your transit bus is using?!? Almost all bicycle front rack on buses take a minimum of 40cm / 16" diameter wheel, which means that even a Brompton would fit (tried it here with Translink and my Dahon as well as Arizona (using the same bar restraining system as our Translink buses in Vancouver) with the slower then molasses bus schedule. The restraining bar that usually goes on the front tire will now have to go on the top tube. It's a similar restraining bar system they use with our Massey Tunnel bus shuttle service as well. So I'm not sure why are you worrying so much on something you perhaps haven't tried fitting because you might feel embarrassed holding up the driver?!? Don't be. If you're new to this, pick a morning weekend when it's not busy and the driver is willing to wait for you fumbling around with the rack. Once you get proficient with it, it's a piece of cake. If you worry about taking the bike in, why not again pick a weekend and try it out for yourself. Why are you doubting yourself so much when you can at least give it a go on the local bus circuit. That's how I did it. With Translink, you need a bag to cover the bike during rush hours. Bag encloses the dirt and chain, so other patrons don't get tire marks or chain oil on their pants or skirts. Personally, I don't even bother taking the bike in the bus if the rack is empty because I have to take an extra step to fold it and bag it during rush hour.