Originally Posted by
howsteepisit
Sorry I misread. I my expereince the 700x38 tubes would be fine. I believe that since the rubber in tubes is pretty streatchy, just about any 700C bigger than 28 would work in a pinch.
I have seen tubes too small get stretched too thin when put in a tire that is too big. I'd rather see DnVer not risk any such things, especially when nice stores like REI probably have something on the shelf that says "27 inch x 1.25 inches Schraeder valve," and the guesswork can be eliminated.