Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Fifty Plus (50+) Share the victories, challenges, successes and special concerns of bicyclists 50 and older. Especially useful for those entering or reentering bicycling.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 06-06-07, 06:26 PM   #1
jim p
Senior Member
Thread Starter
 
Join Date: Apr 2006
Bikes:
Posts: 1,024
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sit bones measurment

I think that I have found an excellent way to measure my sit bones. I took some magic dough and rolled it into a cylinder about 7" long. Then I placed it in a plastic bag. Put the bag on a hard surface and sat down on it. Great impressions of my sit bones were left behind and they were very easy to measure center to center. I came up with a measure of 118 mm center to center and a measure of about 155mm from outside edge to outside edge.

All of this was very interesting to me but I really don't have a clue of how to use this information when thinking about getting a saddle.

So does anyone think this method of measuring sit bones is of any help and does anyone have any thoughts on how this information could be used?
jim p is offline   Reply With Quote
Old 06-06-07, 06:32 PM   #2
George
Senior Member
 
George's Avatar
 
Join Date: Jul 2006
Location: Katy Texas
Bikes: Specialized Roubaix
Posts: 5,376
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Hey Jim 155 seems pretty wide, but if that's the outside of your sit bones, that's what you want in saddle width.
__________________
George
George is offline   Reply With Quote
Old 06-06-07, 06:33 PM   #3
maddmaxx 
Small Member
 
maddmaxx's Avatar
 
Join Date: Nov 2003
Bikes: Leader home built hardtail, Diamondback Response
Posts: 7,136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 150 Post(s)
You will find interesting sizing information at www.sellesanmarco.com
maddmaxx is online now   Reply With Quote
Old 06-06-07, 06:48 PM   #4
old and new
Senior Member
 
Join Date: Mar 2007
Bikes:
Posts: 3,134
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by maddmaxx
You will find interesting sizing information at www.sellesanmarco.com
THANKS.. I initially looked-in on this post expecting too see the ussual theories. The problem with the theories has been applying it to seats in the market, 'till now, I'd never seen published, hard facts.
old and new is offline   Reply With Quote
Old 06-06-07, 07:13 PM   #5
Dchiefransom
Senior Member
 
Dchiefransom's Avatar
 
Join Date: Jan 2003
Location: Newark, CA. San Francisco Bay Area
Bikes:
Posts: 6,205
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Specialized dealers have a memory foam piece that you sit on. Then you measure from the center of one depression to the center of the other. Specialized and a couple of other saddle makers make different widths in some models.
__________________
Silver Eagle Pilot
Dchiefransom is online now   Reply With Quote
Old 06-06-07, 07:20 PM   #6
George
Senior Member
 
George's Avatar
 
Join Date: Jul 2006
Location: Katy Texas
Bikes: Specialized Roubaix
Posts: 5,376
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
In case you have a bad eye, measure from the left edge, to the left edge, or right edge, to the right edge. and you'll be right on.
__________________
George
George is offline   Reply With Quote
Old 06-08-07, 06:15 AM   #7
Road Fan
Senior Member
 
Road Fan's Avatar
 
Join Date: Apr 2005
Location: Ann Arbor, MI
Bikes:
Posts: 12,290
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Quote:
Originally Posted by maddmaxx
You will find interesting sizing information at www.sellesanmarco.com
It is interesting, but I don't see a method for self-evaluation, other than weight. There's also a "S-M-L-XL" parameter and a numerical parameter, how do you use them?

The great thing about Specialized is that with their in-store measurement slab they've got a way to measure the bones without too much confounding by muscle, and a chart for relating the number to saddle width selection. It's a usable system.

Guess I just don't get the San Marco systm yet.

Road Fan
Road Fan is offline   Reply With Quote
Old 06-08-07, 06:18 AM   #8
Road Fan
Senior Member
 
Road Fan's Avatar
 
Join Date: Apr 2005
Location: Ann Arbor, MI
Bikes:
Posts: 12,290
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 24 Post(s)
Quote:
Originally Posted by jim p
I think that I have found an excellent way to measure my sit bones. I took some magic dough and rolled it into a cylinder about 7" long. Then I placed it in a plastic bag. Put the bag on a hard surface and sat down on it. Great impressions of my sit bones were left behind and they were very easy to measure center to center. I came up with a measure of 118 mm center to center and a measure of about 155mm from outside edge to outside edge.

All of this was very interesting to me but I really don't have a clue of how to use this information when thinking about getting a saddle.

So does anyone think this method of measuring sit bones is of any help and does anyone have any thoughts on how this information could be used?
With such a wide variation, I'm not sure you're measuring bone only v. bone and muscle. Plus, the measurement gets smaller as you sit in a more aero position with a straight spine to your pelvis, which at least in Specialized product, leads to selecting a narrower saddle for more aero riding.

Road Fan
Road Fan is offline   Reply With Quote
Old 06-08-07, 07:09 AM   #9
maddmaxx 
Small Member
 
maddmaxx's Avatar
 
Join Date: Nov 2003
Bikes: Leader home built hardtail, Diamondback Response
Posts: 7,136
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 150 Post(s)
Weight.....Short size......the numerical parameter is the answer. Saddles in the Selle San Marco product range come with different width numbers in any particular modle range.

Slightly crude but remarkably effective. Unfortunately does not directly cross over to other brands. It may however indicate dimensions on the appropriate saddle that you can use when looking at saddles.
maddmaxx is online now   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 06:08 PM.