Spoke with James at Diamond Back this afternoon and he stated 235!75 R15 was the correct size for a G. He advised of brands: Nexin & Toyo. Never heard of either one. I suppose they are made by a major company?
I have Diamond Back DB2 radials 235/75/R15 with a 3" white wall, same size whitewall as original tires. If you want the original look of bias ply tires then they offer those too. If you plan on driving the car I would go with the radials, I am very pleased with mine. They usually have a holiday sale with $50 off each tire if you can wait till December
8.00-15 nominal diameter 29.3 to 29.7 inches (variability by
brand back then).
I think Coker now has some 8.00R15 vintage looking whitewalls not
sure sidewall width, but 1961 was last of the wide whitewalls and
they had gotten progressively narrower by year til they went to
narrow white in 1962. There may be some better experts here, but
as first responder, I would guess about 3 inches - not much wider.
225/70R15 (nominally 27.4 inch OD) equated to G70-15 or in your
vintage 7.10-15.
227/75R15 (28.3 OD) H78-15 or roughly 7.60-15; 235/70R15 (27.9
OD) H70-15 (same load as 225/75R15 or H78-15)
235/75R15 (28.9 OD) J78-15 or roughly 8.00-15 - still slightly
smaller OD and radials even at higher pressure will have lower
static loaded radius (shorter sidewall with more bulge at bottom).
Best, Ed
Edward Mills
Antique Tractors 1930-1960
Antique Cars 1960-1985
Now that I've sold my 61
Corvette my 61 300G gets all the attention!
Questions
1. What width size
whitewall did the 300G come with? I'm planning on
buying Coker radials, The stock size was 8.00 - 15.
Would that equate to 225 70R-15?
2. I also need to do the
brakes from stem to stern. I was going to use NAPA for
most of the parts. Comments? Recommendations? Has
anyone used s/s brake lines from Good Brakes or Brake
Hoses Unlimited on EBay?
Thanks,
Mike 300G Barn Find
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Posted by: Michael J Falcone <mjf175@xxxxxxx>
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