TU-58

[js at cimmeri.com]

Ugh... Could this thread get any more 
offensive to people's knowledge..

On 12/2/2015 11:13 AM, Tony wrote:
> Mathematically, circumference is PI 
> times diameter or 3.14159..... times 
> the diameter.
>
>
> On 12/2/2015 11:06 AM, Fred Cisin wrote:
>> On Wed, 2 Dec 2015, Paul Koning wrote:
>>> Actually, it's the circumference 
>>> that matters, not the diameter.
>>
>> I always thought that there was a 
>> relatively stable relationship 
>> between those!  :-)
>> Circumference tends to be a little 
>> over 3 times the diameter (3.0 in 
>> some states)    :-)
>>
>>> Does the circumference of a rubber 
>>> roll change significantly when you 
>>> press on it?
>> If it shifts or squeezes out to the 
>> sides, not so much.
>> If it compresses, yes.
>>
>> Before TPMS, some cars got a crude 
>> estimation of low tire pressure by 
>> comparing the RPM of a tire (ABS 
>> sensors) with its fully inflated 
>> brethren.
>> (circumference changing with pressure 
>> change)
>>
>>
>>
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