Ok, let me rephrase the question since I'm getting nowhere ...
"You are making a reynolds 531 sport-touring frame that's 24.5" large. It's not a loaded tourer, and its not a road-racing bicycle. What butting profiles would you use in the rear triangle."
With this information, I could dig hunt around on the novacycles website and decide for myself if plain-gauge tubes vs. butted rear tubes might reduce frame weight by about 50 grams ... I had always thought the savings of going to a butted rear triangle would be much more than 50 grams.
- Don Gillies
San Diego, CA