Need some quick stem math help

[jwb96]

Rather than doing it by trial and error, figured I could calculate the change first. Hoping someone knows it off the top of his head before I dig back into high school geometry.

I have a 120mm 6* stem. If I flip it over, my bars will drop ____cm.

Thanks!
Jim

[bmeryman]

Assuming a 73 degree head tube angle the difference would be approximately 2.4 cm or about 1 in.

[ultraman6970]

u need this...

http://www.habcycles.com/fitting.html

[jwb96]

Assuming a 73 degree head tube angle the difference would be approximately 2.4 cm or about 1 in.
Thanks!

[93legendti]

There have been threads on this in the past. I stink at math, so I can't recall the answer.
Do a search under "stem math".

http://forums.thepaceline.net/search.php?searchid=847192

[scottaharper]

Here is a link to a stem calculator that I use to answer questions like this:

http://alex.phred.org/stemchart/Default.aspx

Scott

[A1CKot]

I use this one- http://www.brightspoke.com/t/bike-stem-calculator.html. No picture but you can compare 2 different head tube angles an it will give you all the numbers you need.