and i wonder how confused i can get with a mere flick of the wrist. to wit: reading the description of the above link, in the first sentence there are 3 different sizes given - "...Rims: WTB DX18 700C / 29'' (ETRTO 622), inner width: 18 mm*..."

asterisks aplenty with no corresponding footnotes = ggrrr!!!

is '700 S' a size? i have not been able to find a reference, yet someone told me it would be acceptable & less diameter than a 27" wheel. yet all arrows point to '700 C'. above description mentions 29". not 27"

i'm hyperventilating now . . .