These cars predate the use of section ratios in tire names. I would guess that
standard tires back then were usually about 80 series because I remember when
they started using the number, even some of the tires that were supposed to be
wider were still just 75 series, and 70 series really was considered a wide
tire.
> >>> The original 145 70 tires are 21" tall.
>
> The original tires were "145" but I don't think they were 70 series.
> Just regular ol' 145x13, -not- 145/70x13.
>
> I have a cross reference chart that shows that 5.20-13 = 145/70-13, for
> what it's worth.
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