Originally Posted by
Shimagnolo
Perhaps you should read the Sheldon link I posted, before criticizing other people.
It looks like there has been a misunderstanding here. If I read Sheldon's link correctly, he was referring to the ABCDs that follow the tire's three-digit diameter dimension (700C, 700D etc). The OP was asking about the c in 700 x 25c, which presumably refers to the nominal width in centimeters.