Thanks to all for your input! I am so inexperienced in these matters and way behind the times. The last bike I owned was a Schwinn 3 speed "Traveler". This bike was given to me as a gift in 1964. I actually rode this bike and all of it's original equipment till 1983.(except for the tires) Then my son used this for one summer and then, after much neglect, it finally became non-functional. I recently bought a diamond back outlook mainly because I can't continue running because it just is too much of a counter-productive exercise for someone of my age. I really enjoy bike riding, and at 55 years of age, it seems to really work for me.