I'm looking at a Specialized Roubaix and it comes with Folcrum Racing 4 wheels. A check of the Folcrum website does not show a "4". Another Specialized bike comes with a "6" which is also absent from the site.

Obviously, these are proprietary and made (or just labeled) for Specialized. Does anyone know if the "4" is just a relabled "3" or "5"? If not, does anyone know its specs?

Any general opinions on the Folcrum line of wheelsets?

Thank you.