Originally Posted by
LeCollectif
Correct me if I'm wrong here, but aren't most 1" quill stems equipped with a 25.4mm clamp? Seems to be the only spec I see for them these days.
Not really. There is a de-facto "Italian" standard for road bikes that is 26mm, then there are the old Cinellis that used a propriety standard of 26.4mm. Mountain bikes used 25.4mm. Nowadays everyone seems to be going to 31.8mm for road and mountain bikes.