Originally Posted by DangerousDanR

I have a hard time with this one. I have nothing against using a 23 mm tire, and I don't doubt that they have lower aerodynamic resistance on most wheels. But I have ridden on large rear tires for many years and on 25 mm or larger fronts for over 10 years. I am a large lump, so I need the larger tires. I understand that people believe that a 23 mm tire has less wind resistance, but I also see most of the group on the hoods 100% of the time.

But, yes, the flats are mostly 23 mm, and they seem to mostly be Conti, either GP4000 or GP5000. But most of the tires on those rides are Conti...