1.  Name the tire manufactures that provided tires for 1963/64 Cadillacs?  
2.  What was the standard tire for the 1963/64 Cadillacs?
3 . What was the optional tire for the 1963/64 Cadillacs?
4.  For which Cadillacs was the optional tire recommended?

Answer all 4 and you get the Cigar!

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Uniroyal, Good Year and Firestone... I think, were three of the brands available?

Kevin has got 3 of the tire manufacturers for Part 1 of the Trivia, but there is one more, so we are still looking for the 4th manufacturer, and the answers to 2, 3 and 4. Also, just to note, would have taken US Royal (the tire brand) or Uniroyal (the tire company).

would Yokohama be the 4th brand?

Nope.  The 4th one is a biggie in the US...or has been.

In 66, B.F. Goodrich supplied the tires for my dad's deville convertible, so I'll go with B.F. Goodrich

Yep, Mark names the 4th Tire Manufacture to complete #1 of the 4 part question. Just to add:
The 1963 and 1964 Specification Manuals lists
US Royal, Firestone, Goodrich, and Goodyear
however, the dealer data book only lists  
US Royal, Firestone, Goodrich
I would have taken either answer but Goodrich had to be included

I do remember that Firestone bias ply tires was the Cadillac tire from the factory
All three brands Kevin has suggested came out of GM with different car brands in our years
My 63 Chevy Super Sport came with Firestones off the showroom floor
I was there --20 years old and very much car minded in those years


The optonal tire sizes i think would be for the heavier of the models in the years
The Convertibles --Fleetwoods -and limmos come to mind


Nope, not the answer.

Ok, lets see how close I can get.

1.  Name the tire manufactures that provided tires for 1963/64 Cadillacs?  

Yokohama, Uniroyal, Good Year and Firestone.

2.  What was the standard tire for the 1963/64 Cadillacs?

8:20 x15 Firestone.

3 . What was the optional tire for the 1963/64 Cadillacs?

A white wall tire for the "Normal Production" stuff and a heavy duty variant for the series 75 and commercial chassis stuff.

4.  For which Cadillacs was the optional tire recommended?

See answer to question # 3.

1. Goodyear, U.S. Royal (Uniroyal), Firestone are correct. Yokohama is not.
2. Only partially correct on tire size, and no standard tire brand, all 4 were used.
3.  incorrect. think about what would have been standard fare and what would have been considered an upgrade.
4. incorrect.  it involves equipment, and not a particular body style.

An upgrade would be a radial tyre/tire then.

Is Radial correct... oh great fearless leader?



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