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Re: [Tigers] Gas milage with different tires?

To: <tigers@autox.team.net>
Subject: Re: [Tigers] Gas milage with different tires?
From: "Thomas Witt" <atwittsend@verizon.net>
Date: Mon, 05 Jul 2010 11:33:42 -0700
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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