Originally Posted by scottydsntknow
No it doesn't. You can't choose gears in a vacuum for one. Also the 3.90s are made my Motive and aren't the greatest. Not to mention that you can turn a decent RPM with 4.10s with the 05+ 27" tall tires or go to 28s. But depending on the rest of the setup and how much power the car is making... that will make a big difference.
Its not a vacuum of one...it's a statement of fact.
I've been there, done that and this is accurate information.
Do you have an 05 auto GT and have personally run all those gear sets...personally?
Or are you using second hand information?
315/20's will fit an s197 with the right wheel....done it.
335/18's also fit with the right wheel. Done it.
The difference of 1" in tire height is only worth about 100 rpm at 65 mph.
Not enough to make a significant difference.