Man, I feel completely and totally inept.

So, this is my bike. www.rideblue.com RD-1. It says the FD is FSA Energy Band Mount 34.9.

So, okay, I need a 34.9.

So, I'm trying to order this. http://www.performancebike.com/webap...00_20000_65500

And it gives me two different drop down options? 1 1/4? 1 3/8? What the hell do I need?

I wish I knew more