235 is about the max you can go with a lowered car.

However, it has a lot to do with the offset, tire selected, & suspension used.

My car with 18x8 with 225 will rub the upper fender liner, when I'm taking an aggressive turn.

 

@oshburg

No you shouldnt need spacers, but as 2k S4 said it is about the total setup you have. Each wheel is different with offset, width and how it sits on your car. I am about to have some 18 x 8 Oettinger RE wheels with a 35 offset and Im going to wrap it in 235/40r18 tires and I will not need spacers.

 

Well I am not lowered yet. Stock suspension. Eventually I have plans to get coilovers.

Iam going withHP Evos 18 x 8, offeset 35,with General Exlaim UHP 235/40/18.

I hope this set up won't rub

pkid - not trying to jack your thread. Just going through the same situation as you!!

 

monstertruck car here you come...... get some coilovers

theyre right..totally wheel dependent.

 

Is it going to sit a lot higher than stock ride height? If it is I might be looking at coilovers sooner than I thought.

 

yep, I didnt know what I was getting myself into when I went out and purchased 18" tires thinking I could replace my syock 17" wheels with 18" wheels and be fine. I have seen some pics with 18" wheels on an S4 with stock suspension, and 80% of the time it looks like you are monster trucking (especially in the front with the bigger wheel gap). I already bought my coilovers, got me a used set from someone on Audizine. You can always go the Billstein/H&R spring route which will be cheaper but non adjustable and the performance wont be as good.

For the billstein/H&R spring route, you can get this setup for about 700$ or so new
For nice coilovers on a good sale day, you can get them new for 900-1100$ (for the decent brands, but not the best)

Best bargain coilovers for your S4 will be Vogtlands, Stassis, or H&R, but make sure you do your research to see which have better performance, and which have a better ride quality. Purchase based on what you want most.

 

Any pics of these stock monsters. I want to see what the ride height looks like. Maybe I will be getting coliovers sooner than I thought

 

with my experience with my s4 and rims, dont go any higher tire than a 235, dont go over a offset of 38mm, and I wouldnt go over 18"x8" wheels, on a lowered 200-2002 s4... your selection in this case is very slim... shop around.

 

its all good oshburg I am glad that we can both get some help with our questions here. It has been a tough process buying my 18's. After talking with tire rack for a while and consulting several other tire outlets as well I am just going to stick with the 225/40/18's for my 18x8.5 OZ Gallileo III rims.This will keep my speedometor and odometor readings the same. If you go with a different profile say 235 or 245 it will throw it off some. I hope I dont have any rubbing issues and I do not plan on lowering my ride ever.

After all of this I am tempted just to stick with 17's haha.

 

hmm...what size tires do you have..i would think moving to 18 would have a bigger impact than going from 225 to 235....lol..

But i guess it depneds on what you have now.... if you have say 225/45/17 now...

lets see on the math here... 17" = 431.8mm.. 225*.45=101.25 +431.8 = 533.05
18"=457.2 225*.4=90 .... 90+457.2= 547.2

So by going to that size rim with those tires, youre increasing by about 15mm... now if you went to 235/35/18 (if they do that in 18...might only do 235/40) =82.25 +457.2=539.45 ... which would be more ideal to your stock calibration..

if that made sense?