Working off of a theory that when buying second hand all bets are off, I Googled up some images of 2013 Spesh Roubaix's. None have Q/R seatpost clamps OEM. "Danger, Will Robinson. Danger! Danger!". Or not. But slipping (or stolen) saddle/seatpost combos are no fun. Especially when they are carbon. Pro tip: Those Q/R seatpost collars are designed to curve nicely around the seattube when closed. BTW for anyone interested this site has a sweet deal running on the o.p. bike.