True dat. My Compass 26" tires are noisy (they hum at speed) but they roll 
quite nicely.


On Friday, May 9, 2014 11:41:30 AM UTC-7, Cyclofiend Jim wrote:
>
> Most of the analysis of rolling resistance for bicycle tires points at 
> casing construction as a much more significant factor WRT rolling 
> resistance.   You can create sound without all that much energy loss, and 
> part of it may be related to the audiological perception of the difference 
> - there's a fair bit of tone/timbre difference which certainly fades and we 
> also probably get used to over time.  But, I'm not sure you find much 
> actual friction effect - the deformation of the casing and the ease with 
> which that occurs has greater impact (if I'm understanding Jan's tests and 
> writings, for example).  
>
> - Jim
>

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