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Nitto Stem Model?

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Old 07-24-25 | 12:50 PM
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Nitto Stem Model?

Does anyone know what model stem this is? Stamped on the quill next to the max height line is:

22.2 (0.875)
NITTO • JAPAN
U.0


I think it is "U.0" because the "O" in "NITTO" doesn't match, however I found a similar looking stem on ebay that was clearly stamped "U.Q" so maybe it is an "O"? I included below a photo of the front of the stem in case the shape is a cue.

Thank you for taking the time to read this!
John



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Old 07-25-25 | 03:03 PM
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Looks like the Dynamic to me. I believe it is based on the Specialized S-2 stem design.
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Old 07-25-25 | 03:16 PM
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I've got one that appears identical on my big red British bike...



darned if I recall the specifics on the quill... and it's not in reach right now.

However, I'm pretty sure that I got it from Rivendell, back in the day. This is from the 1996 Rivendell catalog. The Nitto Aero...




Presumably "Aero" is Nitto's terminology for the model, and not just Grant's.

Steve in Peoria
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Old 07-25-25 | 03:49 PM
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Interesting ad copy there, Grant preferring cones to wedges for quill stems. I thought wedges are safer? Is this a weight weenie thing to go along with the alumnum wedge?
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Old 07-25-25 | 06:22 PM
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A shot from the top would help as the Dynamic widens before it gets to the clamp.
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Old 07-25-25 | 07:01 PM
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Originally Posted by Piff
Interesting ad copy there, Grant preferring cones to wedges for quill stems. I thought wedges are safer? Is this a weight weenie thing to go along with the alumnum wedge?
I went back and looked at the catalog, and he does discuss the pro's and con's....


high resolution version

Maybe he's seen more people damage a fork with a wedge? Just speculating, of course.

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Old 07-25-25 | 07:06 PM
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Originally Posted by Classtime
A shot from the top would help as the Dynamic widens before it gets to the clamp.
when I looked up the Nitto Dynamic, the images all showed the "Dynamic" name forged into the side of the stem.
... or just "Nitto" on the extension... ebay.com/itm/326615443941

Not that there couldn't be versions w/o any text, I suppose...

Steve in Peoria
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