What tire size on non-M e46 330i 17x8.5 track setup

I recently just got a square 17x8.5 Apex ARC-8 wheel setup for my e46 330i track car (HPDE) and I am wondering what others run for tires. I was just going to get a 245/40 17 but then I was wondering if a 255 would fit without rubbing. I have a track aliment and setup with 3 degrees of camber up front and 2.5 degrees in the rear. I have not rolled any of the fenders. 

I am curious what others have run without rubbing? 

In my e36 M3, which is quite similar, on the same size wheel, a 245/40 17 worked very well all around.

Spec E46 uses 255/40/17

What offset are the wheels? 
 

I had 255/40 17s on my E36 M3 with no fender rolling. Wheels were 17x9. I believe offset was 44, but it was 15 years ago so I could be off. On 8.5s, I'd probably go with the 245.

I recently bought an E46 330ci ZSP that came on a set of 255/40/17 Falken 660s. Car is lowered on some Bavauto lowering springs and has some camber plates up front, doesn't rub at all and handles exceptionally well. 

In reply to CyberEric :

I just bought ET42 offset based on Bimmerworld's rims offered for the cars in the class.

Offset is 40

id assume most spec e46 cars have rolled fenders. Please correct me if I'm wrong. 

Probably, I haven't finished my car enough to fit the rolling stock on it.

I have fit 275 Hoosiers (and 295 Toyo RRs) on mine, but A) it's an M3 and B) the fenders have been heavily massaged (paint work required afterwards).

Hoosiers:

Toyos:

Both on 18x10s.  The 295s could probably have done with 11s, but I only ran them the one time.

I've seen 255/40R17s done on 17x8.5s (square style 68s with a small spacer in the front) and no rubbing issues.  No fender massaging was required for that. 

I'm remembering I did have a small spacer on the front of my car, think it was like 10mm. 
 

I can never remember if 40 is further out or in board compared to 44 ET....

codrus (Forum Supporter) said:

I have fit 275 Hoosiers (and 295 Toyo RRs) on mine, but A) it's an M3 and B) the fenders have been heavily massaged (paint work required afterwards).

Hoosiers:

 

Toyos:

 

Both on 18x10s.  The 295s could probably have done with 11s, but I only ran them the one time.

OP, 

With fender flares and you can fit 295s. Hope this helps :-).

For 8.5" wide wheels, I'd do 245s

thanks all

I'd love to see some pictures of what car you ended up buying.  Especially if it is a sedan, as they make sexy track cars!

From the ARC website:

 

• Front & Rear: 17x8.5” ET40 with 235/40-17 tires
  • Direct fit.
  • Available in: ARC-8
  • 235/45-17 tires can also be used as a direct fit.
  • 245/40-17 tires are often a direct fit, but may require a small front spacer depending on tire brand and suspension setup.

https://apexwheels.com/fitment-guides/bmw/3-series/bmw-e46-3-series-wheel-and-tire-fitment-guide#performance-street-and-track

They mention suspension since coilovers typically have smaller ID springs allowing more inboard clearance.