We ride our bikes almost every weekend in all kinds of weather.  A typical ride will be fifty to one hundred miles on both hill and level ground.   I feel we are in pretty good shape and ready to take on a longer trip.  My dream is to start at the Canadian boarder and ride the costal highway all the way south to Mexico.  Now I am aware that parts will wear out or break on a trip of that size so I am wondering what sort of bicycle components we should take with us.  I would hate to be caught a hundred miles from nowhere and not be able to repair my bicycle.