Quote:
Originally Posted by Formulabruce
26" is the stock tire diameter, and with correct ride height will fill the wheel wells. Also this is the diamter that your cars speedo was calculated on when new, and is part of your gear ratio..
I know this thread is about stance, but having tried a set of these, the ride sucked.
your 285 tire is 27.098 , that will change your rear gears to a taller gear ( lower number)
Your car in stock form set down in the back nearly 1 inch.....
have fun  |
For the early second gen Firebirds - 26" is the correct height (E78x14 - F60x15). But for the later second gens - 27.5" was the correct height (GR70x15).
My '64 GTO had an original tire height of 26.9", the '65 was 27.1".
Looking for a 27" tall tire for many of us gets us very close to original height.
That said - I think a 255/50/17 is an excellent option for most of us and is readily available from many tire manufacturers.
As far as the speedo being off with taller tires - you are assuming that the rear end still has the same gears.
I have the "correct" tire height on my '64 (27" tall 255/60/15's) but my speedo is off. The 3.42 geared 12 bolt posi vs the OE 3.23 geared 10 bolt posi is the culprit - not the tires.