Tony:
It is my understanding that the proper OEM tire size for TR6 is not
185/70R15, but rather 185/15... no aspect ratio for this size. Otherwise,
I could calculate the rolling circumference of the tires based on my
understanding of the sizing nomenclature. My car is fitted with 185/70R15
Bridgestone SF371s and they are too short. Someone told me once that the
OEM size was closer to a 75% aspect ratio. Go find, for instance, the
aspect ratio on a set of Michelin Redlines. I don't think they have one
designated. They just say 185/R15. Anyone know more about this?
Pete Chadwell
1973 TR6
>Check out the site at www.powerdog.com/tiresize.cgi/. If you know the
>tire size (i.e.- 185/70R15), this site will give you every dimension of
>the tire you need. You can even list different size on the form and it
>will do a comparison of circumferences indicating the difference in
>percentages. This is useful if you want to go to another tire size
>(wider?) with minimal effect on your speedo. Check it out!
>
>Tony Childs
>"72 Spitfire - Resurrected!
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