Originally Posted by
gregf83
If those are specialized turbo they're decent tires so you are unlikely to see much of an improvement by changing them.
edit: This article compares the rolling resistance of a number of tires including the turbo pros that come on the Roubaix:
Specialized Road Tires 2014 - Slowtwitch.com Could be a reasonable difference.
They are Turbo's it says it on the tire, Just looked.