So I just got a new tubular in the mail from nashbar, and I set it up on my disc wheel to stretch it out and I noticed that the valve is too long. It goes past the middle of the hole cut out for the pump, so it is a real hassle to get the pump head in there. Even then I can only inflate it to about 80psi, because the seal isnt good. And yes I have a hasg pipe on my pump so I can inflate disc wheels.
My question is; is it safe to cut out a few mm of material to make the hole larger? Will that destroy the wheel? I know I can go buy another tubular but, then I will always have this useless one lying around.