London-Edinburgh-London 2013: The thread

[Tynan]

not just taller but in proportion, I refuse to believe there is no correlation

 

[velovoice]

not just taller but in proportion, I refuse to believe there is no correlation

Well I certainly know that you can take 10 women of the same height and weight, proportion (length of body vs. legs), chest measurement, waist measurement, hip measurement (all the usuals for determining size), and their sit bone widths will vary greatly. It won't make any difference whether any have been pregnant (even slightly or to full term and natural birth).

I suspect the same will be true if you can get a control group of 10 very closely-similar sized men. (Pregnancy not being any more relevant to them in this context than it is to women, believe it or not.)

I used to date a guy who was 5'11", slim build, indeed classic old-fashioned cyclists' physique. His sit bone width was significantly greater than mine. (I am 5'4" and about 3 stone overweight.)

 

[Tynan]

he was a lot taller than you and had a wider sit bone?

and indeed was a different sex

anyway we're arguing about nothing really, I see your point

 

[srw]

Samples of 10 are not statistically significant. Nor is a sample of 2. But the sample of 2 demonstrates 100% correlation.

And variability within a uniform cohort says nothing about correlations across cohorts.

However, this mathematical disquisition is diverting the thread. Brooks are great, but buy the right one.

 

[Tynan]

a sample of ten might be, depends upon the size of the group they're drawn from init

ah but is it a new thinner leather Brooks?

 

[srw]

a sample of ten might be, depends upon the size of the group they're drawn from ini?

No, it doesn't. Unless the population is only 10. Once upon a time I knew why.

But let's leave the thread to people who think 1400km inside a week is a nice holiday.I'd like to be the sort of person who thinks it might not be an insanely heroic achievement.

 

[middleagecyclist]

None of this helps me decide which Brooks i should get for my audax bike!

 

[martint235]

No, it doesn't. Unless the population is only 10. Once upon a time I knew why.

But let's leave the thread to people who think 1400km inside a week is a nice holiday.I'd like to be the sort of person who thinks it might not be an insanely heroic achievement.

How can you not think it will be fun??

 

[PpPete]

None of this helps me decide which Brooks i should get for my audax bike!

pop along to your local specialized dealer and have them measure to determine if you have a big arse wide or narrow sit-bones

 

[middleagecyclist]

pop along to your local specialized dealer and have them measure to determine if you have a big arse wide or narrow sit-bones

But i want a Brooks...not a Specialized!

 

[Tynan]

No, it doesn't. Unless the population is only 10. Once upon a time I knew why.

if you've asked the entire population it's a bit more than representative, you don;t have to ask everyone

'Take a piece of aluminium kitchen foil and place it on a carpeted stair. Sit on the foil, lean forward a bit to approximate your riding position, then lift your feet. This should leave a good impression of your rear in the foil, and you can measure between the two points of deepest impression to get your sit bone width'

sadly my stairs don't have carpet

 

[mcshroom]

If you really want to knock yourself out srw, have a google search for the 'Data Quality Objectives' process

 

[PpPete]

But i want a Brooks...not a Specialized!

Yes but having measured you they will tell you whether you are a narrow, regular or wide (by their standards) then you have to think of an excuse for not buying one of their saddles (being a tight arse seems appropriate)

 

[middleagecyclist]

Yes but having measured you they will tell you whether you are a narrow, regular or wide (by their standards) then you have to think of an excuse for not buying one of their saddles (being a tight arse seems appropriate)

I've got a B17 already and love it. Not sure if it is the right one for 300 odd KM per day for 5 days. Decisions, decisions!

 

[PpPete]

I suspect the B17 will be a very popular choice amongst LEL riders. If you know it already works for you then I wouldnt change..... unless the bike you will be using for LEL puts you in a very different position than the one with the B17.
Personally I have quite a low position now (worked it down gradually, as I decided with my large frontal area, the aerodynamic benefits were significant) so a narrower saddle is even more appropriate, I'd only use a B17 on flat bar bike now.