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Chain stretch - actual tech.



 
 
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  #21  
Old February 23rd 13, 11:47 PM posted to rec.bicycles.tech
datakoll
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Posts: 7,793
Default Chain stretch - actual tech.

GNAW only humor no ignorance.
He is soooo good at this one cud believe he's pro writer.
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  #22  
Old March 7th 13, 05:32 AM posted to rec.bicycles.tech
Marcus Coles
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Default Chain stretch - actual tech.

On 21/02/13 02:35 AM, James wrote:
I just came across this;

http://www.cantitoeroad.com/docs/con...ns_Stretch.pdf

I can't see whether the stretch was plastic or elastic. The length
doesn't appear to have been measured again with a 10kg load.

If it's plastic ... ouch! I hope it's not. I don't think it can be.

0.5% under 150 kg load. 39 tooth CR has a radius of about 79mm, and
175mm cranks gives a force multiplier of 2.2. A 75kg dude could easily
stretch a stretchy chain 0.5% just by standing on the pedals.


Tech on wreck.bike whooda thunk it.

Chains with holes are faster not just lighter.

Chain stretch is actually good, it can smooth out your power delivery
for an overall net gain in efficiency.

Combined with oval chain rings it can slingshot you down the road!

More details after KMC funds my research.


Marcus


  #23  
Old March 7th 13, 12:34 PM posted to rec.bicycles.tech
datakoll
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Posts: 7,793
Default Chain stretch - actual tech.


More details after KMC funds my research.


Marcus


KMC may buy a new CR

 




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