Thanks mate,

I was never able to find such a comprehensive explanation to all the different tyre designations, even on the tirerack website.  Every place I looked tells you about the P-metric system, or the American system. (such as 23x6-15)

http://www.tyresizecalculator.com/tyre-wheel-calculators/tyre-size-for-rim-size-width-calculator

Edited November 13, 20169 yr by TomoHawk

No problem, glad to help.

I did finally find a website that will provide a list of compatible tire sizes for most wheel sizes, and for my 4x15 wheel, I'd get a 175/80-15 tyre.  It's  just about the same circumference and will fit almost flush with the rear deck.