Guess you mean bicycle... or do you mean the regular bikes with engines?
I like bikes(bicycles?). I had one I nolonger own now, that I usually drive to different places,but I found abit difficult to always use on steep express roads. That's probably one of the reasons I nolonger use it.
The peddling features are great for exercising the body... you come home feeling relaxed & in good mood after exercising through a calm/natural places. Hopefully I will find one with engine that is fuel by solar/clean-renewable for occasionally climbing of difficult hills and places.
I was guessing earlier too!
Anyway, there are those electric bicycles with rechargeable batteries that has both pedal power and an electric battery power option also.
I don't know much though about it yet though, but I've seen some being used on the streets and I have a co-worker before that actually uses that as his main ride to and from work.