help me help myself.

[swoop]

i need to spruce up my training bike.... and am gonna swap stems. the bars are slammed and i've got 3t less.. which i think is an 80 degree stem.


i'm gonna put on some rotors which i think are +/-7.5 degrees.

what's the diff.... how much higher or lower is 7.5 than the 80 if the stem is 120...

i can't figure it out... i can talk to you about your feelings but these number thingies hurt.

..

ok.. is 7.5 like 75 degrees so were talking half a degree?

[e-RICHIE]

you need a cts moment atmo.

[swoop]

bike accessories are the new furnishings. screw bed bath beyond....


rapha so needs to do a line of furnishings. ponyskin lcw chairs with a white stripe and club chairs via marcel wanders, atmo.

[gt6267a]

This is and old school soh, cah, toa ... sin is opposite over hypotenuse, cosine is adjacent over hypotenuse, and tangent is opposite over adjacent.

Sin(angle) = What you want to know / stem length

So ... what you want to know = sin(angle) * stem length

I put the 7.5 in just to show that it probably was 75.

[swoop]

thanks. *laughs*.. so... how many fingers lower is the 75?

[Avispa]

Yo Swoop....

Do a search on this forum or on Google, for "Excel stem calculator". I think someone posted a reference to this.

Now, "how many fingers lower is the 75?", dunno bro. What kind of fingers you talking about? Monkey fingers or human fingers or what? :D

..A..

[swoop]

i'm just kidding around.. i got it. i can see it! :banana:

[stevep]

gt,
can you bring this out a few more decimal places?
thats not exact enough for swoop...
how about 10 places?
tks
swoops fit agent sp

fingers... funny... years ago i'm getting a frame for a former pro rider who was spending his dotage with my team...( paul mccormack/ irish mafia )
and i ask him what size frame he uses...
his answer...
" 2 fingers between the tt and the dt"

easy enough i say...

[Too Tall]

i need to spruce up my training bike.... and am gonna swap stems. the bars are slammed and i've got 3t less.. which i think is an 80 degree stem.


i'm gonna put on some rotors which i think are +/-7.5 degrees.

what's the diff.... how much higher or lower is 7.5 than the 80 if the stem is 120...

i can't figure it out... i can talk to you about your feelings but these number thingies hurt.

..

ok.. is 7.5 like 75 degrees so were talking half a degree?

I must like you or sumpin'

"To calculate the effect of raising a stem, add 0.96cm of rise for every 1.0cm of quill or steer tube you expose, and subtract 0.30cm of reach." L.FreakinZinn

[gt6267a]

gt,
can you bring this out a few more decimal places?
thats not exact enough for swoop...
how about 10 places?
tks
swoops fit agent sp
...

seriously ... maybe 25 places! the defaults in excel are silly. anyhoo, one other tidybit to mention, the higher stem brings the reach back 3mm. time for coffee.

[steve575]

This is what you need.

[FierteTi52]

Try http://www.habcycles.com/fitting.html Way easier than math.

[gomez308]

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

This is a nifty chart.

[Avispa]

This is what you need.

Hey,

Do these stems stay like that for more than 4 hours? You may need to see your doctor! :D

..A..

[soulspinner]

Hey,

Do these stems stay like that for more than 4 hours? You may need to see your doctor! :D

..A..


My 75 year old dad says if his stem stays like that for more than 4 hours the last person he will call is his doctor.... :p