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Old 05-17-2019, 09:09 PM
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unruhjonny unruhjonny is offline
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Join Date: May 2004
Location: Calgary, AB, Canada
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Quote:
Originally Posted by Held for Ransom View Post
Never heard of a JO 14x6 Rally II wheel. Only 6 cyl. Firebirds should have received 14x6 wheels, unless it was a Space Saver spare.
I was going to write a long winded response, but I stopped myself;

I consulted with:
1) my February 26th (1970) salesman pocket guide,
2) my (Jim Osborne reproduction) '70 Firebird Illustrated Facts & Features Manual,
3) as a copy of a "Beginning of Tomorrow" 1970 Firebird sales brochure

They all confirm the same information.

The standard tire on both the base and Esprit is in fact a E78/14 tire;
Actually, the "Beginning of Tomorrow" brochure actually makes it quite clear (as I have asserted) that this tire is on a 6" rim, while the F70/14 tire is on a 7" rim.

This is from the base model standard vs optional page:


This is from the Esprit standard vs optional page:


I suspect this is like the Esprit getting a 12 bolt rear end when opted with a L65 (400-2bbl) engine;
Opting for one thing changes another - just in this case oping for a larger tire bumps up the wheel width.

Now think about this for a moment - if this was the short response, imagine what the long winded one might have looked like - har-har!
(Oh my brothers would be making fun of me right now!)
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__________________
1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.


1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)