Originally Posted by
Toona
BUT...I did see that Nitto made stems that were 25.4 / 26.0 clamp...which meant that they would accommodate both size handlebars.
I think you're mistaken. I would like to see your original reference, but I bet it means there's one stem available with
either a 25.4mm clamp
or a 26.0mm clamp. I've never seen a stem that does both.