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!
> Voice:781-438-2568 FAX: 617-258-9535 | Cell: 339-927-4489
> ---------------------------------------------------------------------------
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