Measuring stems?
08-14-17 | 08:58 PM
#1
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Measuring stems?
From what I understand, stems are measured centre of handlebar to centre of stem. Is this correct?
I went to the LBS asking for a 110mm stem, and was given this. Am I correct in thinking it is actually 100mm, or am I not understanding the measuring correctly? Just want to know if I screwed up in not asking for long enough, or they gave me the wrong one. Either way, I need a bit more reach.
08-14-17 | 10:35 PM
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Measure it along the length of the body ... the steeper the angle, the shorter the overall length for a given stem tube length. (i.e a 120 mm 17 degree stem might measure, center of bars to nut, 100 mm and so would a 0-degree 100 mm stem ... but the angled stem would have a longer stem tube. I do believe that is what Fietsbob meant.)
(Rationally, I knew the Great Stem-length Misdirection Conspiracy would be uncovered eventually, but ...
No one expects the Stem-lengthish Inquisition!)
(Rationally, I knew the Great Stem-length Misdirection Conspiracy would be uncovered eventually, but ...
No one expects the Stem-lengthish Inquisition!)
08-14-17 | 10:50 PM
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+1
The distance is measured along the theoretical axis running down the center. (corresponding to a schematic blueprint).
With angled stems, measuring the top or bottom will cause a false high or low.
That said, it still looks more like you got 100mm than an 110. Remeasure from the side along the stem to confirm.
The distance is measured along the theoretical axis running down the center. (corresponding to a schematic blueprint).
With angled stems, measuring the top or bottom will cause a false high or low.
That said, it still looks more like you got 100mm than an 110. Remeasure from the side along the stem to confirm.
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FB
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An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
08-15-17 | 06:37 AM
#7
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The stem in the photo is 100 mm.
@jefnvk, you are measuring correctly. They gave you the wrong length. Take it back.
-Tim-
@jefnvk, you are measuring correctly. They gave you the wrong length. Take it back.
-Tim-
08-15-17 | 06:39 AM
#8
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Yeah, that is what I figured as well, but I looked all over it and didn't see any. The shop only had OEM ones sitting in the back, nothing boxed, they measured it with a caliper and told me it was 110 (probably should have paid a bit more attention to what they were doing).
08-15-17 | 07:14 AM
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Yeah, that is what I figured as well, but I looked all over it and didn't see any. The shop only had OEM ones sitting in the back, nothing boxed, they measured it with a caliper and told me it was 110 (probably should have paid a bit more attention to what they were doing).
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Stuart Black
Dreamin' of Bemidji Down the Mississippi (in part)
Plan Epsilon Around Lake Michigan in the era of Covid
Gold Fever Three days of dirt in Colorado
Pokin' around the Poconos A cold ride around Lake Erie
Dinosaurs in Colorado A mountain bike guide to the Purgatory Canyon dinosaur trackway
Solo Without Pie. The search for pie in the Midwest.
Picking the Scablands. Washington and Oregon, 2005. Pie and spiders on the Columbia River!
