Is a triple crank really needed for a bike that won't be used for any heavy "touring"? I'm paper building at this point my dream bike (separate thread as things progress) and I have most ideas figured out except the cranks. I was thinking something along the lines of TA cranks (like these) http://3.bp.blogspot.com/_C1XrRVl3W8...nk+3+small.jpg
I'm just not sure if I need a granny gear. Thoughts?