Classic & Vintage - Newbie needs help with quill stem
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03-16-09, 07:11 PM
I want to tweak the fit of my '83 Trek 730 slightly by replacing the original stem with one that's shorter in the horizontal dimension, to bring the bars a little closer to the seat. I want a stem that looks similar to what I have now, just for aesthetics. I'm pretty sure it's a 1" quill. I measured the thickness of the bars at the center at 25.4mm. The horizontal length of my existing stem seems to be about 110mm (center to center). On eBay I see some Origin 8 stems that seem right, but there's one dimension I don't understand. Can someone tell me what part of the stem has a dimension of 22.2mm?
Copied from eBay description:
# FORGED ALLOY POLISHED
# 60MM CENTER TO CENTER
# -17 DEGREE ANGLE
# 22.2 x 180MM LENGTH QUILL
# 25.4MM CLAMP
# 1" QUILL
03-16-09, 07:42 PM
22.2mm = inside diameter of the steerer tube our outside diameter of the stem shaft. That's the standard size and should fit your Trek (many French bikes take a slightly smaller--22.0mm--stem). I'm not sure how Origin8 measures height (the 180mm dimension), but it's likely from the minimum insertion line to the top.
03-16-09, 10:12 PM
Thanks Neil. That answers my question enough to go ahead and make the purchase. Now, just to satisfy my curiosity, to what does the 1" dimension refer? I had assumed that was the inside diameter of the steerer tube but now I know better. Maybe it's the outside dimension?
03-16-09, 10:21 PM
The 1" is the OD of the steerer.
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