Unfortunately Specialized does not allow changes to bikes that are ordered, either on line or by the store- So my choices appear at this time to be the Pro, with the CLXIII or the Expert, with the C38- a price difference of $2000. Or buy a frame and build it up, although I don't see on the website where you can buy just the frame, unless it's an S works. Or switch to a different company, I've looked at Factor and know a couple of people who bought them locally and love them. Stories of creaky BB on the internet are a little bothersome. Oh well more research to do