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

[Mystikal]

16x8 et20 lowered on H&R race/e90hats.

16/45/??? Don't want to roll the fenders.:-D


edit, down for a mild roll. I really want to run 225s

Needs a rear roll for 225/45/16s.

[Mystikal]

Great thread here!

Im looking at running 17x8 +40 and 17x9 +45 with 20mm 4 to 5 lug adapters. I figure the fronts will work perfect but wondering about that extra +5 in the rear and any clearance issues. Im on broadway static 16/18k. Pretty flexible on tire size as well...any recommendations sir?

Thank you!

That's pretty much perfect. I'd go with 205/40 front and 215/40 rear tires for easy fitment. If you really want big tires, 215/40 and 235/40 can work with some rear fender rolling and maybe pulling. I'd go for the stretch, though.

Also, a recommendation on your spring rates that's totally unasked for. That front rate is waaaaayyyyyy too high. The motion ratio of the rear suspension of an E30 means the wheel rate is, in reality, about 60% of the spring rate. The front is close to 100%. This means that in effect, your rear springs are the equivalent of 10K front springs.

I have almost the same coilovers, with a similar suspension setup (Z3M). I have tried an uncountable amount of spring rate combinations, and landed on 10K/18K as perfect. The ride quality difference going from just 12K to 10K was dramatic. There is zero chance of a street tire being able to handle 16K worth of spring, the front of your car will skip and bounce along the roadway rather than absorb the undulation and keep the tire planted. Again, totally uncalled for, but I'm telling you. The best mod you can do is 10 or 12K front springs to re-balance your car and let the front struts actually move.

[Mystikal]

To follow up: Ruff Racing R358s need at least 7mm of spacers to clear the front caliper brackets. I wasn't willing to deal with that because I didn't want a crazy amount of poke, so I sold the wheels. 15x8.5 +17 fitment does not work with this particular wheel.

Great info. Caliper clearance is something no wheel spec can help you decipher, it's all learned in practice. I just put a set of 17s on my car that required me to both grind down the calipers and run a 5mm spacer. Pissed me off as the fitment was perfect otherwise.

[Mystikal]

Would a 16x7.5 et35 and 16x8.5 et25 size wheel fit and if so, what size tire? Thank you

15mm front spacers needed. 205/50 front and 225/45 rear would look great.

[Mystikal]

Has anyone ever ran a 15 x 10? I want to put a 245 – 40–15 on my road race car, I see a lot of mention of it but not sure if anyone has done it. I'm looking at the 949 racing wheels and then running hub centric spacers.

No one does because they're too wide to functionally work. Even with pulled fenders, 9" is the widest wheel that can be made to work with track rubber.

[Mystikal]

Taken from a thread I started.

Can I run 205/60/15's on a set of 15x7's with an offset of 27?
Suspension is totally stock. Car is 88 325is. I'm a little concerned with the tires clearing the front strut housings.

I'm looking to run them with no spacers (if possible) with no rubbing when turning, etc.
I used to have a set of 16x7.5 Borbet type C's that would scrape against the strut housings when cranking the steering wheel to the ends.

thanks in advance.

They will clear the suspension fine. At full steering lock, it's likely they will scrub the inner chassis a bit. Nothing dramatic.

[Mystikal]

Thankyou bud! You have made me look like a genius when it comes to fitting new wheels on my vehicles the past decade! If I become a millionaire I'm sending you on a vacation!

I'll hold you to that!

[Mystikal]

OK, I need to ask the oracle.

'85 318i, currently with stock springs and 195/60R14 on bottle caps. Top of tire to fender gap is pretty large at 90mm front and 70mm back. Looking to go with H&R race, Bilstein sports and trying to pick new wheels & tire size. Prefer not to roll fenders, but I'm not completely opposed.

The tires I want come in 205/50R16 or 195/55R15 for close to stock rolling radius.

Looking at:
Klutch SL1 16x8 ET15
Enkei 92 15x7 ET38 or 15x8 ET25
Enkei RPF1 16x7 ET35

Any problems with the Klutch on 205/50R16 or is one of the Enkei wheels a better option? With E90 hats or stock?

The 16x8 +15 will rub with a 205/50, 205/45 is required.
15x7 +38 needs 15mm spacers all around
15x8 +25 needs 3mm front spacers
16x7 +35 needs 15mm spacers all around

[HoustonF34]

E30 vert with E30 M3 5 lug swap

I have an E30 vert with E30 M3 5 lug swap.
Sitting on H&R sport OE springs.
I have camber plates in front set at -3 deg rear is also -3 deg from H&R springs.

I have a set of Style 5s 16x8 et23. Can I run 225 x 50 x16 Bridgestone potoenza re-71r for autox?

[randywalters]

Taken from a thread I started.

Can I run 205/60/15's on a set of 15x7's with an offset of 27?
Suspension is totally stock. Car is 88 325is. I'm a little concerned with the tires clearing the front strut housings.

I'm looking to run them with no spacers (if possible) with no rubbing when turning, etc.
I used to have a set of 16x7.5 Borbet type C's that would scrape against the strut housings when cranking the steering wheel to the ends.

Those Borbets weren't scraping on the strut housing when cranked to the ends as the sidewall-to-strut tube doesn't change when turning as they both turn together. What was scraping was the inner rim on the end of the swaybar at full lock. BTDT.


If those 15x7 wheels are truly ET27 they will not rub the strut housings since the tube angles further and further away from the sidewall the higher up you go, but that tire is taller than stock and might be tall enough to rub the underside of the front spring perch so you might want to check into that further.

Here's a pic of the strut clearance of my Kosei K1 15x7 ET27 with 225/50-15 Kumho V700 R-compound tires. Note where the spring perch starts angling away from the strut tube above the tread - this is the dimension i'd be concerned about with a taller 205/60 tire.

[cspec]

Hey Mystikal, thanks ahead for the help!

Just bought 15x8 +20

What kind of tire size can I run?

Lowered with Vogtland springs and E90 top hats in the front.

[cwlo]

I've got 17x8.5" et40 5 lug kit with e36 hubs front (+12), z4 (+2.5) hubs rear. GC coilovers w/camber plates. What size tire and spacer can I run?

Thanks!

[hexe30]

Looking at some 16x8 +25 bbs wheels. HR/bilstine suspension setup. Would they work and what's the largest tire I could fit. May also in the future do UCC brake setup. Thanks ahead time.

[MrBurgundy]

16x8 et20 lowered on H&R race/e90hats.

16/45/??? Don't want to roll the fenders.:-D


edit, down for a mild roll. I really want to run 225s

[dailyrider]

Great thread here!

Im looking at running 17x8 +40 and 17x9 +45 with 20mm 4 to 5 lug adapters. I figure the fronts will work perfect but wondering about that extra +5 in the rear and any clearance issues. Im on broadway static 16/18k. Pretty flexible on tire size as well...any recommendations sir?

Thank you!