I have a quill stem that I recently bought. The width of the shaft is 1in.
Does this make it a 1 1/4 or 1 1/8 or 1 1/2?
I bought it because it was advertised as a 1in, so assumed it was for a 1in head tube....but no....
I think it's 1 1/8th as (I may be wrong) but I think 22.2 is 1", 25.4 is 1 1/8th" and 28 is 1 1/4 (those figures are not eaxtly right, but you get my drift...)
