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Old 12-28-2009, 12:41 PM
unruhjonny's Avatar
unruhjonny unruhjonny is offline
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Join Date: May 2004
Location: Calgary, AB, Canada
Posts: 6,835
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this was a great read!

Regaurding the tire debate, iirc (I didn't click any of hte links) the 235/60/15 is hte closeste to section and height as the original F60/15, but the 245 is closer to the correct tire patch...

I have run 235's, 245's, and 255's;
I liked the 255's the most, but they're a smidge too big for the OE ralley wheels.
IMHO, the 245/60/15 is the best tire - is is only marginally taller than the F60/15 (not enough to make a significant speedo error, but a wide enough tire patch, that it looks right...
I liked the 245's enough (actually they're a rarely ordered tire size btw) that after seeing 245/60/14's on an early Firebird some years ago, I bought a set for my '73 Formula...

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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)