Thanks for all the input. I also got contacted
via e-mail and was told about Firestone and
B F Goodrich have a 820-15 with a overall
diameter of 29.56 and a tread width of 5.40.
The forum did it again. If anyone else is
interested, Firestone also has a 890-15 whitewall
with a 31" dia. and still has about a 5" tread
width.
