Originally Posted by
somebadlemonade
if you have a loved one or really close friend you could use this
http://www.competitivecyclist.com/za...LCULATOR_INTRO
and the shop should help you get a good fit, though using the above link can give you a ballpark don't take it's words as set in stone since you don't quite know what your riding style is yet
and if it's chain noise, meaning isn't squeaking, and just a very light click-click-click of the chain catching the teeth on the gears, if it's squeaking you are flexing the frame around the bottom bracket, you should put it into a lower get and raise the rpm of your pedaling
It could be something else though, I had a loose crank that made the most horrible noise, it sounded like the BB was coming right through the shell. Chains that need lubrication can also make a fine squeaking noise.