Originally Posted by
jiangshi
FWIW, I have found that when using a 25c tire on my De Rosa Professionals, the tire needs to be soft to clear the seat tube and squeeze into the dropouts. Once in, the clearance is fine.
Just remember that if you get a flat on the road and only have 1 CO2 cartridge with you.
Most of my bikes have 23s because they have less rolling resistance. Wait don't they now say that fatter tires have less rolling resistance? :-) I always take a pump with me, if not a frame fit then I take a mini that I can put in my jersey pocket.