Originally Posted by
chasm54
From your account, it isn't clear what problem needs solving, here.
Agreed.
Using
Sheldon Brown's gear calculator, inputting a 50/34 compact crank, 11-23 cassette, and calculating MPH @ 90 RPM, you'll be in the 50x13 combo at 27.1 MPH.
Assuming Ultegra, you'll spend about $300 to go from 53x14 to 50x13 to produce the same 27 MPH at the same 90 RPM. In each case, you'll still have two cogs to go.
I'm not sure what problem that solves, unless you have too much money. And if that's the case, PM me for my depository information. I'll help you dispose of all that nasty cash.
If you really want to do this, and you're interested in the dark gray (almost black) Ultegra 6750 50/34 175mm crank, I may be willing to part with mine, which after next weekend, will have only about 400 miles total on it.