[Tigers] Gas milage with different tires?

[CoolVT at aol.com]

Around here the speed courts do just that if you bring  it up.  They allow 
a 5% variance in the amount the radar reads or officer  states. That 
sometimes can make a huge difference in the fine or the points on  your license.
Mark
 
 
In a message dated 7/5/2010 3:45:36 P.M. Eastern Daylight Time,  
atwittsend at verizon.net writes:

The  other side is that at speed the circumference of the tire can possibly 
 
grow from centrifugal force. A grossly exaggerated example are the rear  
slicks on a Top Fuel dragster.  So, the static measurement might just  be 
the 
best "averaged" measurement.

Interestingly in Fred Phun's  book "How to make your car handle" (page 119 
- 
at the bottom) it states  that manufactures allow up to 7% variations 
regarding tire dimensions for  a given size (Tire & Rim Association, Inc.). 
That 7% is equal to 2:88  gears becoming right about 3.07 gears if you are 
changing tires from both  extremes of that 7% limit.

By the way, I always thought the 7%  factor would be a good argument to get 
out of a mildly over the limit  speeding ticket.  :-)

Tom  (Witt)
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