to everyone with 20's
 

how does it rite? did u drop it? still rides good what are your suggestions as i need new tires and i decided mite as well add some rims.

6mt sedan btw

Rite? You mean "ride".

It's not that different. A good 245/35 and 275/30 setup still rides ok with good suspension.

i have 20" with no drop and have felt no difference in ride harshness or such, and as ttrank said 245/30 F and 275/35 R is a good choice and Falken FK452 are also very good for the price.

ttrank, your car is one sexy beast!

do you think, in general, a car would be slightly sluggish or slower with 20inch wheels compared to stock or smaller wheels?

yes, that applies to any vehicle. 20's way more...the more unsprung weight you add, the more it will affect performance of a vehicle, doesn't matter if you're boosted or completely stock. It may not be too noticeable depending on how much weight, but it still affects it.

^that makes total sense, but do u have any idea what the affects would be in a quantitative way? 0-60 or 1/4 miles, etc

Not sure exactly how much it would affect it...never tested it out so I can't explain from experience how much it affects 0-60 or 1/4 mile times. I just remember when I had 20's the car was a little slower.

how about gas mileage? im getting 15city and 20-22highway..on steady driving not heavyfooted...im thinking of downgrading to 19s...lol

Yeah it will affect gas mileage, though I didn't notice too much since I would constantly alter my driving and it depended the time of day I drove because of traffic and whatnot. Glad I got my coupe 19's right now, but I'll be selling those within a month or so and actually going with 20's. I can care less if I get a lil bit less gas mileage and the vehicle is somewhat slower...it's gonna look clean and that's my concern, haha.

If you add 10lbs total of unsprung weight, it is like adding 100 pounds to the body of the car. Think about it that way.

i kinda figured that would be the case. but like u said, i wouldnt care too much about the difference, as long as my car looks classy. thanks.

there are so many variables it's really only quantitative on an individual basis.

I have some light weight forged 20s for the street,
but I'll still use 18s for track.

Unsprung weight affects suspension characteristics.

Rotational intertia affects acceleration. Rotational intertia is a function of mass distribution. The farther out the mass is from the center of rotation, the greater the rotational intertia.

In short, wheels are mainly for looks.

Off topic fact ... a gallon of gas weighs between 6-7 pounds.;)