I just got a NOS 2003 Klein Q Carbon Team frameset. On the drive side of the seat tube, the tubing is flattened just under where a derailleur clamp goes. I would like to outfit this bike with a 50/34 chain ring combo, but my concern is that this frame is designed for the derailleur clamp to hang relative to a 53. My fear is that I would not be able to clamp safely around the flattened section because the derailleur would sit lower.
I know there is someone out there who can answer this!