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Re: [6pack] Tire sizes

To: Robert Lang <lang@isis.mit.edu>
Subject: Re: [6pack] Tire sizes
From: Rick Norris <rnorris1@swbell.net>
Date: Sat, 23 Feb 2008 16:28:43 -0600
Thanks, Bob! After a few inquiries and web searches, I found that you 
are correct regarding there being more choices in the 70 series tires. 
There are a few 75's for passenger cars but most 205/75R15's seem to be 
light truck tires. Considering that the speedo will be nearly correct 
that'll be my choice.  Thanks again.

Rick

Robert Lang wrote:
> Hi,
>
> Of the choices that you suggest, the 205/70-15 is closest to the stock 
> tire rolling diameter. The 205/75-15 is a tad taller than stock, so 
> your speedo will read about 2% slower than you're going. The 205/70 is 
> about 1% shorter than stock, so your speedo always reads 1% faster 
> than you're going.
>
> Note that 1 or 2% is well within the margin of error for most 
> speedometers, so the answer is that either tire size would be fine. I 
> have a hunch that there are more choices out there for the 205/70-15 
> size.
>
> regards,
> rml
> --------------------------------------------------------------------------- 
>
> Bob Lang              NER/SCCA                 |  This space for rent
> Solo Chair 2008       TR6 40 F Prepared        |  Triumph!
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