Optimal wheel offset for 9-5!? Searched for days

[ma61]

I am trying to figure out what is the optimal wheel offset for the 9-5, and I have searched with no luck.

I have an 05 Aero with the stock 17" 5 spokes.
The stock offset from what I can tell is 49mm., and the width is 7.5(???)

I want to go lower on the offset, but I am seeing lots and lots of conflicting posts.

Some say they have gone as low as 35mm, while other says 40mm is the max.

I believe the Hirsch 18" are 41mm, and I cant seem to find out what the
BBS RK1 or RK2 are.

The wheels I would be putting on are 18x8, and I am either going to be using a 235/40/18 or a 225/40/18. The 235 is going to have a slightly larger diameter.

Any help is appreciated.

[ji5mmy]

I run BBS RK1s, which are 17x8 et35, with 235/45/17. The car is lowered, and I had to add spring spacers to raise the rear suspension to stop it from rubbing over bumps. My general understanding is that et40 generally doesn't rub.

[Snizzoop]

Take this for what it's worth...but it might help.

- I'm driving an '03 Aero, stock suspension.
- I have 235/45 winter tires on my 17x7 +49s, and they rub (due to the slightly larger diameter I assume.
- I have a set of 18X8s with 225/40s that I will be putting on soon. They are +55, but I am going to run a 20mm spacer. From what I have read, 18x8 +35 should clear with 225/40s.
- I've read that 235/40s should clear with 18x8 +40.
- The availability of 225/40 is much greater than 235/40...that played a part in my decision.

Good luck...let us know how it goes, and post pictures when you're done.

[ma61]

Thanks for the responses.

Anyone out there having this problem?

[WhiteT5]

Stock Aero 5-Spoke is 17x7 +49. I am running aftermarket 17x7 +35 w/ 225/45/17 at stock Aero ride height. With 1.5 degrees negative camber out back (Many Aero owners have much more), I figure that I have about 6-7 mm clearance before I start rubbing.

18x8 +40 and a 235/40/18 is about the limit before you start rubbing on a stock suspension Aero.

[ma61]

I went with et35 in case anyone was wondering.

[dunhamjr]

Originally Posted by ma61

I went with et35 in case anyone was wondering.

pics?
rubbing?
wheel width, tire size?

[ma61]

Not on the car yet.

235/40/18, 18x8

[kmbaer03]

BBS CH
18x8.5
ET 35

235/40 conti dws

Perfect

[BlackKnight95]

Originally Posted by kmbaer03

BBS CH
18x8.5
ET 35

235/40 conti dws

Perfect

You must be talking about mine . . . . . .

[kmbaer03]

Originally Posted by BlackKnight95

You must be talking about mine . . . . . .

Then you sir have good taste...

[kojiru]

in the next couple weeks ill be installing 18x8.5 et15 BMW wheels with 20mm adapters = et-5...should be fun!

so anything is possible with a little bit of imagination

[BlackKnight95]

Originally Posted by kmbaer03

Then you sir have good taste...

Seems like we both have similar good taste .....

Steel Grey is my other favorite color for our 9-5

Just wondering how many others have these wheels on their 9-5.

[BlackKnight95]

Originally Posted by kojiru

in the next couple weeks ill be installing 18x8.5 et15 BMW wheels with 20mm adapters = et-5...should be fun!

so anything is possible with a little bit of imagination

You're surely extending the fenders rite ?

With mine it's almost flush with the fenders, front and back as you can
see from the photo, same as kambaer03's car.

Now with what you're doing, you wheel will stick out another 10mm with
the offset and 20mm with the spacers.

Please post photos after you're done ... . . ... .

Btw, have you seen the car from Taiwan posted here sometime ago ?

[kojiru]

no havent seen the car but yes im gonna do a little '' widebody'' nothing to big.... just to cover the wheels, keeping the same oem fender form...ill post picture when im in progress !

But bolting just the wheels with one bolt to see how it fit i was surprise that the ET15, the rim was flush with the fendre in the back...i woul think that et25 would be perfect for a nice stance !

btw nice car !

[kojiru]

lol just found the taiwan car !!! wow quite impressive bodywork but im not going in this direction lol...for most people it will not even look that different...just 20-30mm wider but with same shape

[ma61]

Wheels are on. No rubbing.

18x8 235/40/18 et35

[DavisJ]

what about 19x8.5 38 offset on a 02 9-5 aero? stock suspension

[kmbaer03]

Originally Posted by DavisJ

what about 19x8.5 38 offset on a 02 9-5 aero? stock suspension

Hope you dont mind rubbing...mucho rubbing

[DavisJ]

I'm looking at some winter tire/rim options and would a 215/55r16 5x110 42mm offset work on my 2002 9-5 aero?