JS> As I recall, those came with 7.75x14s, which translates to about a 
5-75.
 BP> If I remember correctly, a 7.75x14 is the same as a 195-75x14.
AM> Yes, that's close...  As far as width goes you can multiply the older
AM> numbers (inches), by 2.54 to get close to the new numbers (mm).
AM> 7.75 * 2.54 = 197  (P195)
AM> 8.75 * 2.54 = 222  (P225)
AM> Now we need a chart for the old letter type designation.  I've seen one 
but
AM> don't remember any of it.  Best I recall, the letters correspond roughly 
AM> to the numbers, but some are the same width with a different height...
The 7.75 was an F series tire, so the 6.75 would have been an E, and so on.
Brien
--- Maximus/2 3.01
---------------