Not that I have any clue what this means, but this is the info I got off of specialized.com:

The Roubaix Pro clincher is the easiest, fastest way to turn long & fast rides into long, fast, comfortable rides. In a unique construction design that merges a faster 23c wide tread with a more comfortable large-volume 25c casing, this tire offers a fast rolling, great handling tire which damps road vibration and increases riding comfort without sacrifice.


700x25c casing matched with a 23c wide dual compound 70/60 tread
DRT design for low rolling resistance and great cornering
120 TPI casing

Anyone?