ASK ALL WHEEL/TIRE FITMENT QUESTIONS HERE - The Official Wheel/Tire Fitment Thread

[Mystikal]

17x10
+ 20
DTM Fiberwerkz fender flares (~2 inches wider than stock flares)
Coilovers
I want grip, lots of it, prefer to not stagger. Tire size?

Fronts will need 25mm spacers just to clear the struts. Rears may need a small spacer depending on how much the tire bulges (or grind the TA).

255/40 is probably the absolute maximum. There will be a lot of trial and error in getting that to work.

[Mystikal]

Fitment and tires question:

I am buying some Borbet BS that are 16x7.5 et 35. (What tires can be run and are some sizes usually cheaper than others?)

I currently have some 10mm hubcentric spacers but the hub diameter is for bigger size like honda, etc.

I was planning on having the raised lip of the spacers ground off and just use them as 10mm non hubcentric spacers. (Is that safe and ok?)

Car is stock height but I am installing an M50 which will probably drop my front end a bit due to the added weight but if it is not enough I will go to lowering springs or those jom coilovers. (Will that affect my tire choices?)

Sorry for all the questions but I appreciate any help.

No, do not create non-hubcentric spacers. You want 15mm F 20mm R spacers for proper fitment, along with 205/50 tires (that's likely the cheapest size that maintains the stock rolling diameter).

[Mystikal]

Hey guys, i've been back and forth between what kind of wheels to get after the swap is done. I just sold the esm reps (no more reps ) which were a square 16x9 et 10 215/40/16 setup. I felt the car had to be to low to pull of the small stretched tires and with the condition of the roads I spent more time pothole scanning then enjoy my drive. I'd like to get some meaty tire to accompany the massive power boost (think 225/45/16). So now if I'm shopping to have some wheels custom built to my spec and wanted to get your guys input on build specs. I was leaning towards 16x8 et 20 to fit the larger tires but also be able to lower the car enough to achieve a healthy balance (full gc coils with camber plates). So basically if you could build your wheels to any spec with respect to having a proper tire, what would it be?

16x8 +22. 225/45 (although 215/45 offers more aggressive tire choices).

That's if you're limiting yourself to 16s, which have by far the worst tire options out of E30 plus-sizing. Otherwise I'd go 17x8 +25 (what I mentioned to Apex for their E30 Arc-8s) and run a 235/40/17.

[Boosted E30]

245/40/17 all around
17x8.5 et41
10mm spacer in the rear
E36 m3 5lug front
E30 m3 5lug rear

I have 235/40 all around right now but would like to go a bit wider now that i have the s50 turbod. It looks as if there is enough room for them but i want to be sure so im not stuck with tires that rub.

[Mystikal]

245/40/17 all around
17x8.5 et41
10mm spacer in the rear
E36 m3 5lug front
E30 m3 5lug rear

I have 235/40 all around right now but would like to go a bit wider now that i have the s50 turbod. It looks as if there is enough room for them but i want to be sure so im not stuck with tires that rub.

Interesting setup. If you used E36 rears you wouldn't be able to run the 245/40, but it should work with your parts. I emphasize should because you're cutting it very close here. You will likely have slight contact in the front wheel well near steering lock.

[Boosted E30]

Great thanks.
They already rub a little on full steering lock on the plastic liner. Its not really a big deal to me as i barley ever have it turned that far.

[bwawuz02]

You see any problem with E30 M3 5-lugs (GC Coil'd) on staggered MSystems?

17x8 et15 215/40 (5mm spacer to clear E30 M3 brakes)
17x9 et22 245/35

I know it's going to take some rolling in the rear, but not sure how much. I want to be able to run slightly tucked (see, not raked) to keep the car somewhat balanced. Yes, I know staggered = understeer. TIA!

[FunfGan]

Even with 195/45s you would need a massive rear fender pull. Not happening.

You sure? I ran 205's on 15x9's et0 with no issues, and these would only stick out 1mm farther... Thanks anyway.

[ninjaotter]

17 x 8 et 35 or 20 in front
17 x 9 et 40 or 25 ( haven't really figured out how the difference in offset will look and effect my BBK.

Right now the car is stock suspension wise, and no fenders rolled. Fenders will be rolled and the car will be lowered on Billie Sports. I want as much meat on the tire as possible.

[e30lyf]

BBS RS 16x7 et25 (1' lip) and 16x8 et12 (2' lip). i want to change the lip. how wide i can go to get flush/stance? TIA

for now i'm running koni sport and IE3 w/ drop hats on late model. i might upgrade GC coilover soon. i have tires 205/45/16 never been mount on those rims.

Put the 16x8s up front and buy 2.5" lips for the 16x7s. Net result is a 16x8.5 +6 (awesome). 205/45s are perfect.

thank you for quick response. :)

are these solid set up for everyday car? i don't want more than 1.5 negative camber. my plan just look perfect stance and tires don't get camber wear.

[tk-421]

Very aggressive. With enough rear arch massaging you can make it work.

Thanks a lot man, I'll definitely be doing some massaging with a happy ending if need be.

[Mystikal]

You see any problem with E30 M3 5-lugs (GC Coil'd) on staggered MSystems?

17x8 et15 215/40 (5mm spacer to clear E30 M3 brakes)
17x9 et22 245/35

I know it's going to take some rolling in the rear, but not sure how much. I want to be able to run slightly tucked (see, not raked) to keep the car somewhat balanced. Yes, I know staggered = understeer. TIA!

Big problem, the rears will be poking a bit. 22 offset with E30 M3 gear isn't the same as E30 4-lug, the hubs push the wheels outward 5-7mm per side. Even with a 215/40 stretched on fender rolling would be necessary. 245/35 is unrealistic.

[Mystikal]

You sure? I ran 205's on 15x9's et0 with no issues, and these would only stick out 1mm farther... Thanks anyway.

+0 vs -14 offset. The centrepoint of the tire will give you massive headaches with fender clearance.

[Mystikal]

17 x 8 et 35 or 20 in front
17 x 9 et 40 or 25 ( haven't really figured out how the difference in offset will look and effect my BBK.

Right now the car is stock suspension wise, and no fenders rolled. Fenders will be rolled and the car will be lowered on Billie Sports. I want as much meat on the tire as possible.

+20 F and +25 R.

If you find a way to increase your front negative camber 235/40 all around is possible (aggressive rear roll needed). Otherwise 215/40 front.

[Mystikal]

thank you for quick response. :)

are these solid set up for everyday car? i don't want more than 1.5 negative camber. my plan just look perfect stance and tires don't get camber wear.

An E30 low enough to fit those properly would have 2.5-3 degrees negative in the rear, and it's pretty much a necessity to fit them properly. If your toe is in check via eccentric bushings it shouldn't be a big deal (camber does not chew through tires like toe can).