Re: Mike's 5K A/C sings Hallelujah!

["Mike White" <MIKE.WHITE@law.utah.edu>]

Thanks for the note Bob,
 
> Rule 23: It is an Audi. There ***ALWAYS*** has to have a minimum of 1 
> (one) item broken or not working at all times.

Hehe!  You speak the truth.  Luckily I am notFrom quattro-owner  Thu Jul 27 15:02:25 1995
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Date: Thu, 27 Jul 1995 10:42:05 -0400
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To: zm@mhcnet.att.com (Zafer Mehmood  [209])
From: gkaufman@tiac.net (gkaufman)
Subject: Re: Formula for tire size conversions and Boston Tire Dealer
Cc: quattro@coimbra.ans.net
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Thanks so much for the info.  My local NTW was clueless.  I'm going to give 
the 195/55/14s a chance.  One of the other tire dealeres here, Direct Tire, 
will let me try the tire out and if I don't like it, they'll just give me my 
money back.  In fact, when you add up all the costs, DT is competitive with 
mail order prices.  Can't beat that!  I never thought that I could fit a 
tire like the Dunlop 8000 to my Coupe GT without upgrading wheel size but a 
1.3% difference sounds like a rounding error. 

Before I put on the Dunlop 8000, does anyone have any experience with it 
(e.g. type of performance in wet, dry, quality of ride, noise) ?  I heard it 
was reviewed in a European car magazine a few months ago.  Does anyone have 
a copy of the issue?


Thanks, glenn
------------------------------------------------------------------------
>
>Here's the formula for determining the diameter of a tire based on the
>standard size designations:
>
>Diameter (in inches) = (2 * tire-width * aspect ratio / 25.4 ) + wheel rim size
>
>The division by 25.4 is to convert mm to inches.
>
>Using 205/60-15 as an example:
>
>	Tire width 	= 205 mm
>	Aspect Ratio 	= 60 (sidewall height is 60% of tire width)
>			  or 0.6 * 205 = 123 mm
>
>	Wheel rim dia.	= 15 inches
>
>So the diameter of a 205/60-15 tire is = (2*205*0.6/25.4) + 15 = 24.69 inches
>
>I have a simple C program that calculates tire sizes and gives a comparison
>of the relative differences. I picked this up from an internet site a
>while back. If anyone wants it I can email it to them, or we can put it
>up on the quattro archive.
>
>Here's the output of that program for the tire sizes that Glenn is
>considering:
>
>% tire.x 185/60-14 195/55-14 205/55-14
>Specification  Sidewall  Radius  Diameter  Circumference  Revs/Mile  Difference
>185/60-14         4.4in  11.4in    22.7in         71.4in        887        0.0%
>195/55-14         4.2in  11.2in    22.4in         70.5in        899       -1.3%
>205/55-14         4.4in  11.4in    22.9in         71.9in        882        0.6%
>
>The "Difference" column lists the % difference in size compared to the
>firstr tire. So, either of the last two tires can be used since the difference
>in diameter is minimal.
>
>Zafer
>
>
>-----------------------------------------------------------------
>Zafer Mehmood				   AT&T Bell Laboratories
>zm@mhcnet.att.com			   Murray Hill, NJ
>
>