[Spridgets] calculating speed

[Weslake1330 at aol.com]

When I asked a leading tyre manufacturer this question they advised that  
while there would be some tyre growth over the life of a tyre there would also  
be a reduction in circumferance as the tread wore away.  Their general view  
was that one cancelled out the effect of the other.
 
As far as circumference growth at speed goes for a typical road tyre - the  
steel bands in the tyre's construction prevent this.
 
W e s l a k e 1330
 
In a message dated 18/10/2008 17:37:38 GMT Daylight Time,  bmwwxman at gmail.com 
writes:

Hey,  David....

My engineering background tells me Dean and Duncan are on to  something.
There will definitely be some tire circumference growth which  changes the
tire diameter making it larger at higher speeds....  Where  am I going wrong
with that thinking?   ;-)

Cheers!!
Jim