EDIT ----> whoops !!!! read it too fast, i thought you meant thats the tire size that came on them, but your talking about the actual measurements of the rim right ?
the tires say 26x1 3/8. they came off a columbia girls 10speed. i just tried to put the mtb tire on and it turned out kinda like the first time i tried to put a new tire on an s-7 rim. didnt workout so well for me. now i dont know what to do with those rims(the 26x1 3/8)...... any suggestions???
well i kinda did make it into a fixie, i think....i basically just took off the sprocket up front and switched it to a single piece bmx crank. and then just mended a chain and looped it around the third gear. i just dont have any brakes on it. heh who needs brakes right?! anyways. it was a AMF Pro Tour 26inch 10 speed. its really fun to ride and pretty fast actually.