And does it really matter that much? I've been riding around on my geared commuter for the day at 48/19 which is about the same as 42/17 and it works pretty decent for me. The SS conversion I'm doing though is on a road bike, 27" that I want to finish this weekend. Any suggestions for that? The area I ride in has plenty of hills, and I don't think I'll have too much of a problem.

Am I nitpicking this to death? I just want my first SS to be successfull, and an enjoyable ride.

Thanks