I think you are probably out of luck if you want exactly one inch. I assume you have consulted Coker as to exactly what they have - maybe the American Classics or their new bias look radials - I have not checked them. But you also need to ask distance from inner edge of whitewall to rim - most originals were a bit further out than some of the reproduction tires.
As to production tires mostly 5/8 inch to 3/4 inch and white edge 7/8" to 1-1/16" from edge of rim while Original BFG and Michelin of late 60's to early 80's vintage appear to have been 1-3/8" (2 samples - one BFG HT Silvertown 770, other Michelin X Radial).
Nexen N'Priz AH5 P235/75R15 5/8" whitewall, 1" from rim edge
Hankook Optimo H724 P235/75R15 5/8" whitewall, 1-1/16" from rim edge
Toyo Extensa A/S P235/75R15 3/4" whitewall, 7/8" from rim edge
Cooper Trendsetter SE P235/75R15 3/4" whitewall 1" from rim edge
All above measured as mounted in 71 vintage Chrysler 15x6 rims at 32 psi.
(Mastercraft, Multi-Mile, and other Cooper made tires will be
same sas trendsetter SE). (Kingstar made by Hankook but appear
lower quality). I did not try Milestar MA775 as they are made in
China and appeared to be inferior in appearance. Above Nexen
(Korea), Hankook (Korea or Indonesia), Toyo (Japan) , Cooper
Two I have not checked Maxxis MA1 and Gremax 5000 but I think
those are also Chinese? Maxxis, however, makes a good ATV tire and
an expensive (supposed to be good) trailer tire.
You could go to Diamond Back and have them custom make a set of
blackwalls into 1 inch whitewalls by vulcanizing on a whitewall
but that is expensive and it puts additional stress on sidewall
during prep (buffing) and secondary vulcanization. Still may be
your only option.
Hi members, I'm still looking for a set of 235-75R-15 one inch radial white wall tires, only found under 1 inch or over 1 inch, tried all internet sites, hope they still make them somewhere. My current tires are gone.Thanks Harry