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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > e90 18" tire pressures?



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      06-04-2012, 01:55 PM   #1
WRC12
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e90 18" tire pressures?

Seeing what tire pressure you recommend in 18" tires, front and rear. There mounted on a XI e90.
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      06-04-2012, 06:06 PM   #2
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When you open your driver door, look at the label. Will list recommendations for your exact vehicle.
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      06-04-2012, 08:13 PM   #3
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I thought thats for 16" run flats? i got 18s now.
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      06-05-2012, 02:16 PM   #4
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Quote:
Originally Posted by WRC12 View Post
I thought thats for 16" run flats? i got 18s now.
But aren't there both 16", 17" and 18" listed?
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      06-05-2012, 02:23 PM   #5
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Quote:
Originally Posted by WRC12
Seeing what tire pressure you recommend in 18" tires, front and rear. There mounted on a XI e90.
Try 38 psi rear and 36 in the front/ but you may want a higher psi, i have 44psi rear and 42 in front/ on 19' rft's
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      06-05-2012, 07:58 PM   #6
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Quote:
Originally Posted by WRC12 View Post
Seeing what tire pressure you recommend in 18" tires, front and rear. There mounted on a XI e90.

On my staggered OEM 18 inch setup
With style 189

Recommended is
34 fr
42 bk

Mind you these are for Run Flats
I still use Fac Spec With summer non Run Flats
Although ,Some argue this is slightly low if used for Non Run Flats


18x8
18x8.5

If I had sq setup

I'd run 38 psi all around
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      06-06-2012, 12:35 PM   #7
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Quote:
Originally Posted by Shahdog View Post
On my staggered OEM 18 inch setup
With style 189

Recommended is
34 fr
42 bk

Mind you these are for Run Flats
I still use Fac Spec With summer non Run Flats
Although ,Some argue this is slightly low if used for Non Run Flats


18x8
18x8.5

If I had sq setup

I'd run 38 psi all around
Tire sidewall says not to exceed 40psi. This is also on staggered 18s on 189s... oem tires...

I filled up today at 37 fr 39 rear HOT. I'll check them later when they're cold.
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      06-07-2012, 03:46 PM   #8
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What I'd normally do is fill them up a bit extra at a gas station by my house. Then the next morning, I'd just purge them and get my goal PSI.
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      06-08-2012, 12:46 AM   #9
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Quote:
Originally Posted by lem144 View Post
Tire sidewall says not to exceed 40psi. This is also on staggered 18s on 189s... oem tires...

I filled up today at 37 fr 39 rear HOT. I'll check them later when they're cold.
So your saying my door panel is wrong

I'll check in morning

But I'm 99% sure it was 34/42
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      06-08-2012, 12:57 AM   #10
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Thought it was 32F 36R
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      06-08-2012, 11:50 AM   #11
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Quote:
Originally Posted by lem144
Quote:
Originally Posted by Shahdog View Post
On my staggered OEM 18 inch setup
With style 189

Recommended is
34 fr
42 bk

Mind you these are for Run Flats
I still use Fac Spec With summer non Run Flats
Although ,Some argue this is slightly low if used for Non Run Flats


18x8
18x8.5

If I had sq setup

I'd run 38 psi all around
Tire sidewall says not to exceed 40psi. This is also on staggered 18s on 189s... oem tires...

I filled up today at 37 fr 39 rear HOT. I'll check them later when they're cold.
Your wrong

Just looked at my door panel

18 inch staggered

Fr 35
Rr 42

On suggested run flats

My max psi according to sidewall is 50 psi
I'm using NRF mich supersports summer tires
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      06-08-2012, 12:13 PM   #12
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I am going from memory, but I believe the door sticker on my 2007 328i coupe with sport package indicates 32 psi front 33 psi rear for the stock Potenza RE050A RFT tire size of 225/40/18 and 255/35/18. However, in small font, they advise 36 or 37 psi front 39 or 40 psi rears for "extended use at speeds in excess of 100 mph." Based on the condition of roads in my area, the ride is pretty intolerable at at the higher pressure levels so I run 33 psi front and 35 psi rear. Hardly a scientific approach, but the ride feels good and I have never had an issue with uneven wear on my tires.
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      06-08-2012, 01:31 PM   #13
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These are bridgestones. It's what I read off the tire at a quick glance. Will definitely check again; that does seem low.

Quote:
Originally Posted by Shahdog View Post
Your wrong

Just looked at my door panel

18 inch staggered

Fr 35
Rr 42

On suggested run flats

My max psi according to sidewall is 50 psi
I'm using NRF mich supersports summer tires
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      06-08-2012, 01:32 PM   #14
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Quote:
Originally Posted by SLCGoonski View Post
Thought it was 32F 36R
That's what my door panel says. Of course the car came with 17"s standard.
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      06-09-2012, 04:08 PM   #15
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Quote:
Originally Posted by VMRWheels View Post
What I'd normally do is fill them up a bit extra at a gas station by my house. Then the next morning, I'd just purge them and get my goal PSI.


What is the goal PSI? I just picked up some staggered hankook v12's in 18"...need to get the right PSI.
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