Originally Posted by
fietsbob
Well, depends on measurements ,
A stem which is itself 1" in diameter is in a 9/8" steerer tube .
it is 1" ID, 1_1/8" OD
a Fork that has a 1" steerer tube has a 7/8" stem in it. AKA.. 22.2 ID, 25.4 OD.
Thanks fietsbob, I think the steerer tube is 1 1/8" OD because I have a 25.4mm quill adapter inserted into it right now.