Bad news if you've had a bike fit

[Chris S]

http://journals.lww.com/spinejourna...es_in_Lumbar_Intervertebral_Distance,.12.aspx
Your spine typically contracts by 5mm each day and then expands back to its original length overnight. If you've spent hundreds of pounds on a millimeter perfect bike fit then you've wasted your money!

 

[black'n'yellow]

that would only be relevant if you had a bike fit while you were asleep...

 

[screenman]

A few stretches before mounting the bike would take care of that.

 

[Chris S]

that would only be relevant if you had a bike fit while you were asleep...

It means that your bike fit is only precise at the same time each day.

 

[black'n'yellow]

It means that your bike fit is only precise at the same time each day.

Haven't read the study, but assuming it is even correct....

let's say you wake up at 7am and go to bed at 11pm - between those 16 hours, your spine will be contracting at a rate of 0.3mm every hour (assuming the reduction is linear). It's not going to be a problem. And even if it was, it would only affect your reach, which is one of the most variable distances on a bike fit in any case...

 

[400bhp]

Is this the most pointless thread ever?

Ner ner you wasted your money, ner ner.

 

[400bhp]

Assuming the study is even correct....

let's say you wake up at 7am and go to bed at 11pm - between those 16 hours, your spine will be contracting at a rate of 0.3mm every hour. It's not going to be a problem. And even if it was, it would only affect your reach, which is one of the most variable issues on a bike fit in any case...

I was gonna write that, but then deleted it.

Assume normal distribution for bike ride and contraction. If I could be arsed working it out I think you'll find something like a 99% chance that you are within 1mm on a bike ride.

 

[fossyant]

Not worth worrying about it !

 

[gaz]

This is hardly new. The study was produced in 96 and I recall hearing about it in biology at school in the early naughties.

 

[ianrauk]

*imagines thousands of cyclists who have had a bike fit running around in blind panic over 5mm's difference*

 

[Lee_M]

*imagines thousands of cyclists who have had a bike fit running around in blind panic over 5mm's difference*

surely runnign about will compress their spines even more

.... oh no... what to do

electronically variable frame anyone?

 

[NormanD]

whats the weight gain of that 5mm's could mean shaving a few grams off a component

 

[400bhp]

If you've got a "turtles head" pooping out (touching cloth) that probably adds a few mm.

So does the thickness of shorts.

Thicker socks.

:sigh:

 

[Banjo]

If you've got a "turtles head" pooping out (touching cloth) that probably adds a few mm.

So does the thickness of shorts.

Thicker socks.

:sigh:

Not sure what to worry about now, should I fret over my bike not fitting or because pooing on the bike could affect things as well?

 

[Chris S]

And even if it was, it would only affect your reach, which is one of the most variable distances on a bike fit in any case...

Does the mean that 'to the millimeter' bike fits are meaningless, at least as far as reach is concerned?