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Elviento and spacers vs. stem rise...a diagram to illustrate(8 posts)

Elviento and spacers vs. stem rise...a diagram to illustrateAhimsa
Jul 10, 2002 8:49 AM
Maybe this will clarify what I was reffering to in the thread below.

Your theory only works for a given distance between point B and point C as it is relative to the spacer distance corelation to stem rise. The same bar height can be achieved if and only if they are equal or the number of spacers displaced is made equal to rise.

Otherwise, in many circumstances (particularly the extreme cases as the original pic demonstrated) a simple flip of the stem and moving all the spacers above it will create changes to fit.

Now, I concede that one can flip a stem and move some spacers and get the same bar height, but it is not always possible and would need to be calculated carefully.


A. (Sorry for the large pic folks, I was in a hurry and screwed up the size)
re: Elviento and spacers vs. stem rise...a diagram to illustratelegs
Jul 10, 2002 8:59 AM
I think this is making me horny!
Stem extension calculator!Justride
Jul 10, 2002 9:03 AM

Check out this handy tool!
One more diagram (for you horny types like Legs)...Ahimsa
Jul 10, 2002 9:10 AM
This one is done with the exact same stem (length and rise) as the other, only with less spacers and steer tube.


I think I get your point...elviento
Jul 10, 2002 10:23 AM
Maybe I don't. You are saying that to flip the stem and achieving the same bar height involves the switching around of 3.7cm of spacers, which is a lot. And given the most common 2.5cm or less spacers, the net result of flipping the stem and switching spacers will probably raise the stem and also shorten the reach. If that's what you are saying, then I agree 100%. My diagram addresses a situation where you have lots of spacers to start with, at least 3.7cm. Well, that's exactly the case in the photo on cyclingnews (the specialized S-Works).

Typically, unless you move at least 3.7cm of spacers from below stem to above stem, flipping a stem will almost certainly result in higher bars and shorter reach. But I don't think that's a problem, because as you sit more upright, you will have less reach anyway. In practice, though, I have noticed nothing can replace trying different positions to figure out your most comfortable position.

Happy riding.
I like the ears nmPdxMark
Jul 10, 2002 10:32 AM
Yes, I actually think we were on the same page all alongAhimsa
Jul 10, 2002 10:41 AM
...just expressing & expanding upon different parts of the same concept.


re: Elviento and spacers vs. stem rise...a diagram to illustratebrider
Jul 10, 2002 9:29 AM
From what I remember of the original picture, it looked like Elviento's example would work. Your first example is true only if you move ALL the spacers together. What was suggested was to move only enough to achieve the same bar position, and discard those above the stem, yielding a lighter assembly.