Thanks Caleb! Everyone is out of the 305-40-18's, was looking at the 305-45-18's but was worried about the additional 1/2 height.
If I switched to the 45 height and with 410 gears what would the make my "gearing"?
effective gearing comes to 3.95.
The basic formula is current tire height divided by new tire height, times gear ratio.
So
27.25 / 28.25 X 4.10 = 3.95
I have been running the 305/45/18's on my car for the past six months or so on 18x10 FR500's and even with the adjustable panhard they still rub a little on both side of the car. My car is on Sportlines so it sits fairly low but even if it were a little higher it would still rub due to the width of the tires and the offset of these wheels. When I replace these it will be with something slightly narrower but the same height to go along with my 4.30's. I think with your 4.10's you would be much happier with the 295 or 305/40/18.
Thats doesn't make any sense, if you mean they just rub on the outside fender, thats becasue of your ride height with sportlines.
305/40/18 are actualy slightly wider than 305/45/18. But the shorter tire may help since your lowered so much. Or you can swap some stock heigh springs out back and you would have no issues either.
305/45/18 are 12.05" wide and 305/40/18 are 12.13" wide.
From my experience the 305/40/18 555r which I have now on 18x10 GT4 rims (which is the same offset as the fr500, unless your running the wrong (99-04) offset on your car) Nitto say they are 27.7" tall but on my car with 30psi for street driving they measure 27.25" tall with a tape measure. The 305/45 are advertised at 28.78" tall but under load with the correct pressure theya re gonna measure less. Im just speculated here but im fairly certain as my next set of dr will most likely be the 305/45's.
And as a general rule of thumb nitto sizes run slightly smaller in width/height compares to the same size specs of a different brand.
I am just telling from my own experience what you will see if you run the 305/45/18's, and I can tell you they are not going to measure less than the 27.8 I mentioned in my previous post, or at least the set I have does not. I am running the correct offset, but the tire is wider than the wheel and causes it to rub, not enough to cut the tires or to cause visable damage to the fender but they definately rub on both sides of the car. Also for you the taller tire may be a good thing with the turbo but Greg does not need to reduce gearing with the Centri if he wants to go fast at the track. I actually bought them to reduce gearing (4.30's) on the street and intend to run a slightly shorter slick at the track.