I must be drunk or something, i can not find the weight on their webpage. could you help a brother out?
http://www.bianchiusa.com/06_muss.html
its a short freewheel
Thats what we are here for. Your bike and my bike are speced the same. The link you first provided is what you need.
You need a Cassette cog. or the bottom picture from sean's post
just buy heythorp's 18T. it's the easiest solution to your pain.
i'm pretty sure you need splined.
i said i might put the 18 on but only out of ease, i have it hear now.... and i said you should do a 19 not a 20
20 will be too easy for you.
Yes, you will need a chain whip and a lock ring wrench.
No, do 19. The SS is lighter, and thus easier to pedal. The geared 20 next to a SS 19 will feel the same, at least.
lemme know when you are doing this. btw - i am out for tomorrow's class, and will need to reschedule with john.