700 x 23 has always been the Mexican Standard.  Recently I pulled two Vittoria Open Corsa Evo CX, 320tpi, tires {my favorites} off the shelf without looking at the profile; turned out they were 25s.

Sunday I took a ride that meandered the mean streets in the City of Angels (L.A.) and as I was rolling along talking with another rider I didn’t notice the mondo xtreme killer-pot-hole ! Watch Out Fool!   Ohhhhh Shit! The impact was so jolting it felt like I had broken both wrists(!) and as I was expecting the wheels to go all collapsed-out and both tires to blow flat I just kept rolling without an incident.  Gotta jack it all to the 25s.

Facts are in: 25s roll smoother and have better resistance to compression punctures (pot-hole-flats).  Studies show 25s have a lower CRR (Coefficient of Rolling Resistance); read this study http://www.rouesartisanales.com/article-1503651.html {the study takes a good scientific approach to analyzing the difference between narrow and wide tires; 23c vs. 25c}

NOTE: If your clearances are tight, 25s might not fit your bike.

Veinticincos AniMaux!