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  1. #1
    Join Date
    Jul 2009
    Location
    Luxembourg
    Posts
    20

    measuring your sit bones

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    this may be a stupid question: but how do you measure the distance between your sit bones? is there a good and easy technique to do this?
    Trek WSD 1.9 (2009), Selle Italia Gel Flow Lady/Brooks B17 (testing)
    Specialized Safire Expert (2009), Ariel 130 mm
    Specialized Era HT (2008), Ariel 143 mm

  2. #2
    Join Date
    Aug 2009
    Posts
    325
    Fill a one or two gallon ziploc with flour (not crammed full). Place it on a hard kitchen chair. Sit on the bag and lean forward, with a straight back until your elbows touch your knees. You can put your feet on a stool to elevate them a bit as well. Your sit bones should leave an indent in the flour. It works with play-doh too, apparently.

  3. #3
    Join Date
    Sep 2007
    Location
    Uncanny Valley
    Posts
    14,645
    I highly recommend making a tracing. The simplest way to do this is to make your butt-print on a piece of paper to begin with (you will still have to outline the indentations, since the indentations will fade with time), but you can trace the indentations on whatever else you use, also. With a tracing, you have a permanent, portable record of the size and shape of your sitbones that you can lay over any saddle.
    Speed comes from what you put behind you. - Judi Ketteler

  4. #4
    Join Date
    Apr 2006
    Location
    South Carolina
    Posts
    176

    crazy but this works

    This is nuts - but it works! Find some SECLUDED pavement (like your patio) - take a piece of white paper (like you would put in a copier) - get naked and sit on the paper. Voila - you will see your sit bones on the paper - and you can measure the distance. just be discreet!!
    "Character cannot be developed in ease and quiet - only through experience of trial and suffering can the soul be strengthened, ambition inspired and success achieved" - Helen Keller

  5. #5
    Join Date
    Jun 2002
    Location
    Mrs. KnottedYet
    Posts
    8,990
    Just do what I did: sit nekid on the company xerox machine. You get a picture you can take with you to the LBS and ... Just kidding, TE. Seriously you can also use a close and trusted friend and a tape measure. Just don't walk up to complete strangers with the tape measure.
    Last edited by Trek420; 06-29-2010 at 05:57 AM.
    Custom Road bike ~ Mondonico Futura Legero
    Found on the road ~ Motobecane Mixte
    N+1 new bike ~ Salsa Vaya
    Commuter ~ Soma Buena Vista Mixte

    http://madeinusareviews.blogspot.com/

  6. #6
    Join Date
    Apr 2006
    Location
    South Carolina
    Posts
    176

    oh yeah!!

    I like the sit on the copier idea - then you can even shrink it down without diet and exercise!!!! hmmmmmm
    "Character cannot be developed in ease and quiet - only through experience of trial and suffering can the soul be strengthened, ambition inspired and success achieved" - Helen Keller

  7. #7
    Join Date
    Jun 2002
    Location
    Mrs. KnottedYet
    Posts
    8,990
    Yes, but I think your sit bones have nothing to do with weight or height or .... You can have wide sit bones with narrow hips or vice versa. It's just bones. Just like you can be tall with small feet or short with big feet .... it's just bones.
    Last edited by Trek420; 06-29-2010 at 10:03 AM.
    Custom Road bike ~ Mondonico Futura Legero
    Found on the road ~ Motobecane Mixte
    N+1 new bike ~ Salsa Vaya
    Commuter ~ Soma Buena Vista Mixte

    http://madeinusareviews.blogspot.com/

  8. #8
    Join Date
    Jun 2010
    Posts
    6,485
    I used the Play Doh method, but I'll add that it works best to roll it about .5 inches thick, wrap it in aluminum foil to prevent it sticking to the hard surface or youself (just imagine), and then remove foil and let dry.

    You can even paint the imprint like they do for kid's handprints.

    Just kidding.

    From there, a paper tracing is nice to bring with you.

    If you want to make Play Doh, it's one part salt, two parts flour, mix with water until it's right for modeling.

  9. #9
    Join Date
    Jun 2002
    Location
    Mrs. KnottedYet
    Posts
    8,990
    Oooh, and with Play dough you could use newsprint instead of aluminum foil. That way you get the sit bones measurment on the Sunday Funnies. Just kidding.
    Custom Road bike ~ Mondonico Futura Legero
    Found on the road ~ Motobecane Mixte
    N+1 new bike ~ Salsa Vaya
    Commuter ~ Soma Buena Vista Mixte

    http://madeinusareviews.blogspot.com/

  10. #10
    Join Date
    Sep 2008
    Posts
    2,560
    Here's a recipe for edible chocolate Play Doh.

  11. #11
    Join Date
    Aug 2009
    Posts
    325
    Haha! Oh that is clever. A play-doh you can measure your butt with, and then eat. How versatile.

  12. #12
    Join Date
    Sep 2007
    Location
    Uncanny Valley
    Posts
    14,645
    Yuk!
    Speed comes from what you put behind you. - Judi Ketteler

  13. #13
    Join Date
    Oct 2008
    Location
    Australia
    Posts
    271
    I used the yoga mat method. Put a yoga mat on the bottom or second bottom step of some (preferably wooden) stairs. Sit on it. After a few minutes your sit bones will leave an imprint in the mat. Measure it.

    No cooking required!

    No eating required!

    PS: Don't wear your knicks -the padding distorts the result. Naked would probably be best but only if the stairs are inside! And if it's a thin mat - fold it a couple of thicknesses to speed up the result.
    2008 Shogun Ninja/BBB Women's Race
    2010 Scott Speedster S20FB/BBB Women's Race
    2011 Avanti Vitale 3 (converted to flat bar with triple)/Zero Zia Pro
    2008 Kona Lisa HT/WTB Speed She
    2009 Specialized Era Marathon/Ariel SL 143
    2008 Holstar Roadster (tandem)/WTB Speed She

  14. #14
    Join Date
    Oct 2008
    Location
    Australia
    Posts
    271
    Quote Originally Posted by Zelda_K View Post
    this may be a stupid question: but how do you measure the distance between your sit bones? is there a good and easy technique to do this?
    And so Zelda - do you notice any difference in comfort between your two different widths of Ariel seats? I also have the 143 (came on my Era) and absolutely love it but am unsure whether it is predominantly the width or shape that does it for me and how transferable that is to another Spesh seat.

    I'm not as happy with the seats I have on my roadies and would like to try a Jett or similar but am reluctant to shell out the dollars if it is going to be a disaster.
    Last edited by pinkbikes; 06-29-2010 at 03:18 PM.
    2008 Shogun Ninja/BBB Women's Race
    2010 Scott Speedster S20FB/BBB Women's Race
    2011 Avanti Vitale 3 (converted to flat bar with triple)/Zero Zia Pro
    2008 Kona Lisa HT/WTB Speed She
    2009 Specialized Era Marathon/Ariel SL 143
    2008 Holstar Roadster (tandem)/WTB Speed She

  15. #15
    Join Date
    Nov 2009
    Location
    Canberra Australia
    Posts
    83
    Or you could go into your LBS - they will have some special memory foam that is designed to measure your sit bones as well as a size chart about what that means

 

 

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