Quote Originally Posted by Seajay View Post
Pretty sure Specialized uses a different carbon layup on the Ruby...expecting the average rider to be a bit lighter than that of the Roubaix. Theory would make sense, I suppose, to keep ride quality the same for a lighter rider...the frame would have different characteristics.
Interesting! It would make sense to use different layup on different frames. Is the determining factor frame size or "probable user weight"? (The sizes of the two bike frames I'm looking at are nearly identical.)