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  1. #1
    Senior Member minivandriveby's Avatar
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    Calling all mathaletes (serious nerds)

    Ok. I'm curious and just too lazy to figure this out. Plenty of engineers and idiot savants watching the clock right now so here's a little math work for you. First one with the right answer wins thanks and praise from yours truly...

    A bike has a 130mm stem with 0 degrees. Stem is replaced with same length stem but has a 17 degree rise. How much lift in mm/inches would that bring about?

    I told you it was easy.

  2. #2
    The Improbable Bulk Little Darwin's Avatar
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    If you are looking for extreme accuracy, you need to let us know what the head tuibe angle is...
    Slow Ride Cyclists of NEPA

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  3. #3
    Pokes On Spokes JPradun's Avatar
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    130sin(17)=38mm, but it will be 6mm closer to you. You might want to go with a 135mm stem at 17 degrees.

    PS, don't be an ass.
    The quest for success: Collegiate Nationals:
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  4. #4
    Senior Member ryder47's Avatar
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    Quote Originally Posted by JPradun View Post
    130sin(17)=38mm, but it will be 6mm closer to you. You might want to go with a 135mm stem at 17 degrees.

    PS, don't be an ass.

    +1 Just a confirmation.

  5. #5
    Senior Member minivandriveby's Avatar
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    Quote Originally Posted by JPradun View Post
    .

    PS, don't be an ass.
    Eh? What's this all about.

  6. #6
    Senior Member ryder47's Avatar
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    Quote Originally Posted by minivandriveby View Post
    Ok. I'm curious and just too lazy to figure this out. Plenty of engineers and idiot savants watching the clock right now so here's a little math work for you. First one with the right answer wins thanks and praise from yours truly...

    A bike has a 130mm stem with 0 degrees. Stem is replaced with same length stem but has a 17 degree rise. How much lift in mm/inches would that bring about?

    I told you it was easy.
    Maybe your comment in bold above?

  7. #7
    Senior Member minivandriveby's Avatar
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    I thank you for the answer. I was just attempting humor, not intending to hurt your feelings. I'm sorry.
    I am an ass, but not the bad, nasty kind... Again, apologies.

  8. #8
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    Are they the same brand of stems? If not, then their stack height is probably different, which would affect your answer...and of course you'll need to know the headtube angle to give a meaningful answer.

  9. #9
    TreadHead MtbVA's Avatar
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  10. #10
    Feral Member Nicodemus's Avatar
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    what's all this now? basic trig question being labelled for mathletes?

    no no no no no, that's not mathlete material at all. Not good enough, sonny laddy jimmy laddy sonny jimlad sonny jim.

    give me 7 state nonlinear inherently unstable optimization or give me death.

    pah, kids these days.
    Quote Originally Posted by KrisPistofferson View Post
    Did you just say "minarchist?" I'm going to start a 10-page vaginathon because only Libertarians can define Libertarianism. Also, you're mean.

  11. #11
    Senior Member minivandriveby's Avatar
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    Quote Originally Posted by MtbVA View Post
    That's what I'm talking about. Nice! Thanks. Now back to drums and space...

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