Thanks. I haven't had any problems. The ride quality is fine, more firm than 15s obviously, but very livable as a daily driver as long as your roads are half way decent. And the wider performance tires will be louder than stock size, and you'll get some minor tramlining (front tires like to follow little irregularities in the road). Both of these things would come with a wider summer tire, no matter the size. I have had two sets of 18s over about 4 years now, never had a problem.

 

what are da specs on ur tires now? and what kind?

 

Right now I have 225/40-18 Yokohama AVS ES 100's. I've also had Kumho 712's in the same size.

That tire size is basically exactly my stock overall diameter (6th gen i4).

 

geeez...i thought 225's would rub...ah well...thanx tho man

 

225-40-18 here also, no rubbing. id go with 18s on a 6th gen or 7th gen, and 2 inches is a good right height in my opinion.

 

I saw this thread and figured I would ask the same question. Only difference is the roads in Boston, Taxachusettes are really jacked up ( Mostly in the city due to the construction) I'm really considering 17's for my 6thGen because of this but love the look of 18's. I'm only lowered about 1.5 front and back on Koni Yellows and Eibach Pro Kit springs. The ride is already pretty firm. How much of the acceleration is affected by the 18's?? Anyone?

 

Well if you are worried about the roads, loss of ride quality, acceleration, 17s might be a better option. If you want a "larger wheel" look, try to avoid wheels with a lip, that can make some wheels look smaller. As far as how the acceleration is affected...I swap my wheels and tires for winter with some 16" Acura wheels, with 205/50/16, and when I swap back to my 18s in the spring, I notice it for a couple days...just a very slight lag in acceleration, and the last few feet stopping for a stoplight, etc...but it seems like only when the brake pedal pressure is light. It's so slight that I don't notice it after a couple days, and the first couple days it's very subtle.

Just make sure you get some lightweight wheels, no matter the size. My 18x7.5's are 19-20lbs, which isn't bad for what I paid. You can get lighter, but you'll pay more.

Bottom line, if you want 18s...the slight difference in acceleration and braking isn't enough of a factor. In fact if you have real crappy tires right now, the new tires on 18s might actually improve it.

 

Thanks!! I was really wondering about that rotational mass that the 18's might bring and it doesn't seem that signifigant.