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Inseam Measurement?

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Cycling Equipment
Published
4 June 2003
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6 June 2003
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Tom
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  1. What is the correct way to measure the inseam?

    I stood barefoot with my feet about 10" apart. AND if I used a broom stick and bring it up 'firm'
    against the crotch, it measures 87.63 cm. BUT, if I take a metal ruler "edgewise" and force it up
    against the 'pubic bone' it measures 90.00 cm. That's almost a full inch difference in inseam
    measurement.

    Which measurement should I use in determining bike size computations?

    Tom

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  2. "Tom" <[email hidden]> wrote in :"]news:[email hidden]:

    Quoted message said:

    I stood barefoot with my feet about 10" apart. AND if I used a broom stick and bring it up 'firm'
    against the crotch, it measures 87.63 cm. BUT, if I take a metal ruler "edgewise" and force it up
    against the 'pubic bone' it measures 90.00 cm. That's almost a full inch difference in inseam
    measurement.

    If you had to jump off your bike quickly and you landed straddling your top tube with your feet 10"
    apart, how far up your leg would like the top tube to rise before it stopped?

  3. tom-<< Which measurement should I use in determining bike size computations?

    Femur length, not inseam. Femur length will determine proper seat tube ANGLE and then your upper
    body/arms will determine proper top tube :ENGTH and stem length. Inseam or standover means little.
    If the seattube angle and top tube length is proper, the standover will take care of itself.

    Sizing that uses inseam is incomplete at best. For instance, two riders have the same inseam but one
    has long femurs. Long femur person cannot ride a 58cm Colnago(steep seat tube, cannot get the saddle
    back far enough)) whereas the other guy can...

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 vecchios.comvecchios.com "Ruote convenzionali costruite eccezionalmente bene"

  4. Tom said:

    I stood barefoot with my feet about 10" apart. AND if I used a broom stick and bring it up 'firm'
    against the crotch, it measures 87.63 cm. BUT, if I take a metal ruler "edgewise" and force it up
    against the 'pubic bone' it measures 90.00 cm.

    Ouch!

    Quoted message said:

    Which measurement should I use in determining bike size computations?

    The classic way of doing it is to use a hard cover book. With one edge of the book pressed against
    the wall the other edge is made parallel to the ground. Mark the spot on the wall with a pencil
    and measure.

    Art Harris

  5. So how do you measure your femur length without an X-ray?

    Curious

    JW

    "Qui si parla Campagnolo" <[email hidden]> wrote in message
    "]news:[email hidden]...

    Quoted message said:

    tom-<< Which measurement should I use in determining bike size


    computations?

    Quoted message said:


    Femur length, not inseam. Femur length will determine proper seat tube


    ANGLE

    Quoted message said:

    and then your upper body/arms will determine proper top tube :ENGTH and


    stem

    Quoted message said:

    length. Inseam or standover means little. If the seattube angle and top


    tube

    Quoted message said:

    length is proper, the standover will take care of itself.

    Sizing that uses inseam is incomplete at best. For instance, two riders


    have

    Quoted message said:

    the same inseam but one has long femurs. Long femur person cannot ride a


    58cm

    Quoted message said:

    Colnago(steep seat tube, cannot get the saddle back far enough)) whereas


    the

    Quoted message said:

    other guy can...

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 vecchios.comvecchios.com "Ruote convenzionali costruite eccezionalmente bene"

  6. "Jason Wright" <[email hidden]> wrote in message
    news:<[email hidden]>...

    Quoted message said:

    So how do you measure your femur length without an X-ray?


    Here's one way:

    rivendellbicycles.combikes framesize.html

  7. Quoted message said:
    Quoted message said:

    Here's one way:

    Quoted message said:
    Quoted message said:

    rivendellbicycles.combikes framesize.html

    Quoted message said:

    Okay. You have to know your saddle height. If you know your saddle height,


    read the >chart below. If you don't know your saddle height, take off your shoes, stand on a hard

    Quoted message said:

    surface with your feet 10-inches apart, and measure between your legs (the tape measure >should be


    right in the middle) from the floor to your pubic bone. Not your genitals. Hit the >bone. Figure out
    how to do this using a thin, hardcover book and a metal tape.

    Quoted message said:

    Your floor-to-pubic bone measurement is your pubic bone height.

    Quoted message said:

    example: If you are 5 feet 9 1/2, your pubic bone might be 85cm. Your


    saddle height will >be about 75cm.

    Quoted message said:

    Once you've determined your saddle height, you have a simple subtraction to


    determine a >good frame size. "A good frame size" doesn't mean it's the only size for you. The whole

    Quoted message said:

    purpose of sizing is too give you a comfortable riding position, and for most people that >means


    getting the bars level with, or within a couple centimeters, of the saddle height. The >lower the
    number you subtract, the higher the bars can be. In France or England in the

    Quoted message said:

    '40s, you'd subtract about 15cm. In the case above, that would have that


    5-foot 9 1/2 >inch rider on a 60cm frame.

    They were doing great Right up to the part where they tell you how to measure your pubic bone
    height. wall, book, tape, to easy Then they go straight from that to talking about saddle height,
    without saying anything about how to work out your saddle height from your pubic bone height. Did l
    miss something?? or do you just take off 10cm like in there example? thanks stuart

  8. They just recommend taking off 10cm, although its not very clear Tom "stu" <[email hidden]> wrote in
    message "]news:[email hidden]...

    Quoted message said:
    Quoted message said:
    Quoted message said:

    Here's one way:

    Quoted message said:
    Quoted message said:

    rivendellbicycles.combikes framesize.html

    Quoted message said:

    Okay. You have to know your saddle height. If you know your saddle


    height,

    Quoted message said:

    read the >chart below. If you don't know your saddle height, take off your shoes, stand on a hard

    Quoted message said:

    surface with your feet 10-inches apart, and


    measure

    Quoted message said:

    between your legs (the tape measure >should be right in the middle) from


    the

    Quoted message said:

    floor to your pubic bone. Not your genitals. Hit the >bone. Figure out how to do this using a
    thin, hardcover book and a metal tape.

    Quoted message said:

    Your floor-to-pubic bone measurement is your pubic bone height.

    Quoted message said:

    example: If you are 5 feet 9 1/2, your pubic bone might be 85cm. Your


    saddle height will >be about 75cm.

    Quoted message said:

    Once you've determined your saddle height, you have a simple subtraction


    to

    Quoted message said:

    determine a >good frame size. "A good frame size" doesn't mean it's the


    only

    Quoted message said:

    size for you. The whole >purpose of sizing is too give you a comfortable riding position, and for
    most people that >means getting the bars level with, or within a couple centimeters, of the saddle
    height. The >lower the number you subtract, the higher the bars can be. In France or England in


    the

    Quoted message said:
    Quoted message said:

    '40s, you'd subtract about 15cm. In the case above, that would have that


    5-foot 9 1/2 >inch rider on a 60cm frame.

    They were doing great Right up to the part where they tell you how to measure your pubic bone
    height. wall, book, tape, to easy Then they go straight from that to talking about saddle height,
    without saying anything about how to work out your saddle height from your pubic bone height. Did
    l miss something?? or do you just take off 10cm like in there example? thanks stuart

    -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- newsfeeds.comnewsfeeds.com - The #1
    Newsgroup Service in the World! -----== Over 80,000 Newsgroups - 16 Different Servers! =-----

  9. "Femur length, not inseam. Femur length will determine proper seat tube ANGLE and then your upper
    body/arms will determine proper top tube :LENGTH and stem length. Inseam or stand over means little.
    If the seattube angle and top tube length is proper, the standover will take care of itself.

    Sizing that uses inseam is incomplete at best. For instance, two riders have the same inseam but one
    has long femurs. Long femur person cannot ride a 58cm Colnago(steep seat tube, cannot get the saddle
    back far enough)) whereas the other guy can...

    Peter Chisholm"

    So what's the poor guy supposed to do with that? It may be more accurate, but how's he supposed to
    measure his leg bones? Take them out? LOL!

    May you have the wind at your back. And a really low gear for the hills! Chris

    Chris'Z Corner "The Website for the Common Bicyclist": geocities.comczcorner

  10. Chris-<< So what's the poor guy supposed to do with that? It may be more accurate, but how's he
    supposed to measure his leg bones? Take them out? LOL!

    Nope, go to somebody that has a fit cycle and sit on that to determine proper seattube angle..not
    rocket surgery or brain science..

    Inseam measurements only to determine frameset size(standover and crotch distance test)can be wildly
    inaccurate.

    Peter Chisholm Vecchio's Bicicletteria 1833 Pearl St. Boulder, CO, 80302
    (303)440-3535 vecchios.comvecchios.com "Ruote convenzionali costruite eccezionalmente bene"

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