I've personally only seen these in 26.0. The one I have on my 1988 Mercian KoM holds just fine. I think I'm using a Nitto "Dream Bar". I believe these stems were made by Nitto for Shimano.
Regards,
Jerry Moos Big Spring, TX
Tom Dalton <tom_s_dalton@yahoo.com> wrote: Regarding the Shimano Dura Ace "aero" style stems, I have two questions:
1) Do they take a 26.0 or a 26.4 mm handlebar, or did they come in both sizes?
2) Do they require a specific knurling on the bar to grip correctly. I recall the similar Cinelli 1-R having trouble gripping bars that did not have good, clean Cinelli-style knurling.
Thanks,
Tom Dalton Bethlehem, PA USA
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