I am looking for a stem to replace a 26.4 Cinelli 1R. I'd like to replace it with an X/A, but the vast majority of those available for a reasonable price are 26.0. Is it possible to use a 26.0 stem with a 26.4 bar? Rationally it seems like 0.4mm wouldn't be that much for the stem to spread and still be usable.
Do any of you know if it would work?