ride4jc

Okay - one more follow up - here's the specs for this bike:

http://www.giant-bicycles.com/en-us/...yle/940/28431/

My confusion comes from the specs saying, "Cassette", not freewheel -

And what is a 'freehub?':

http://www.sheldonbrown.com/gloss_e-f.html#freehub

Sorry - just want to learn

Thanks