Tyre Pressures - BMW 3-Series (E90 E92) Forum

K3VMO · 01-28-2009, 09:03 PM

Right guys/gals,

Silly question... but heard some random advice from a garage just a few days ago. I'm currently running:

Front: R19/35/235 - Pirelli P-Zero Nero
Rear: R19/30/265 - Pirellia P-Nero Zero

Now I've always assumed the correct typre pressure was 32 PSi. But the other day some random garage was telling me I should be running them at 38 PSi.

That sounds awfully high........ any comment?

little_croco · 01-28-2009, 10:14 PM

I am not so sure about 19", but I am running my 18" at 40 PSI (280 kPa).

Bimmer /E93 · 01-29-2009, 06:26 AM

I have 19" 235/30 front and 255/30 Rear. Tyre pressure varies depending on temp/season... I run mine at 35PSI front, 33PSI Rear
In general tires lose 1-2 PSI per month in hot weather, you might want to add a +1PSI to your current setup than.

kcleung · 02-08-2009, 11:34 AM

think manufacturer usually quote cold psi numbers, if you want to be clinical abut this, get a pressure gauge and a pump. you might want to consider nitrogen as well.

M_M · 02-10-2009, 11:37 PM

Quote:

Originally Posted by little_croco

I am not so sure about 19", but I am running my 18" at 40 PSI (280 kPa).

40psi? you needa go to an autocross very often? j/k.

SnowHill · 02-11-2009, 03:17 AM

Quote:

Originally Posted by M_M

40psi? you needa go to an autocross very often? j/k.

yes, 40!?
isn't it too high?
u didn't feel slippy ma???

Minichamps · 02-11-2009, 08:38 AM

Does anyone check this label?

http://www.convertunits.com/from/bar/to/psi

little_croco · 02-11-2009, 09:25 AM

yes wor, I usually maintain them at around 40psi...

william_cwl · 02-11-2009, 10:52 AM

2.7 bar is 39psi....

i guess it's a recommendation for very smooth roads and highway?
i dun think it's acceptable for rough roads like hk!

Black Pig · 02-11-2009, 08:43 PM

I am using
Front: R19/35/235 - Hankook S1EVO 34PSI
Rear: R19/30/265 - Hankook S1EVO 36PSI

actually i am also wondering if my setting is correct or not........

little_croco · 02-11-2009, 10:46 PM

i will be a consideration of balancing off ride comfort and gas consumption

kcleung · 02-12-2009, 12:29 AM

umm, after how bmw brag about their 50-50 weight ratio, they recommend different tyre pressures front and rear (also for 225/45 size)??

ArktisE92 · 02-16-2009, 11:46 AM

I run 33 and 35 psi on my 19" 235/35 and 275/30 Mich PS2s (measured cold). But then I prefer a slightly heavier steering. The nose gets considerably lighter as you go from 32 to 34-35.

I used to run 32 all around to make the ride more comfy for the HK Island roads. But I went for the better handling after a while, comfort be damned

dannygenio · 02-17-2009, 01:11 PM

lol tyre......

K3VMO · 03-20-2009, 01:57 AM

Okies,

After bouncing round a few garages and asking numerous mechanics... it turns out the general consensus is the settings I'm running: 36 PSi (Front) & 38 PSi (Rear).

You can tweak it +/- 2 PSi either way depending on your preference for handling.

01-28-2009, 09:03 PM	#1
K3VMO New Member Drives: White 335i Conv. Join Date: Jan 2009 Location: Hong Kong Posts: 6 iTrader: (0)	Tyre Pressures Right guys/gals, Silly question... but heard some random advice from a garage just a few days ago. I'm currently running: Front: R19/35/235 - Pirelli P-Zero Nero Rear: R19/30/265 - Pirellia P-Nero Zero Now I've always assumed the correct typre pressure was 32 PSi. But the other day some random garage was telling me I should be running them at 38 PSi. That sounds awfully high........ any comment?

01-28-2009, 10:14 PM	#2
little_croco Lieutenant Colonel Drives: E90 330i Monaco Blue/Beige Join Date: Nov 2007 Location: Hong Kong Posts: 1,963 iTrader: (0) View little_croco's Garage	I am not so sure about 19", but I am running my 18" at 40 PSI (280 kPa). __________________ E90 330i VB36 Monaco Blue/Beige/BurledWalnut - Prodrive GC-014I Forged 18" 8.5J/9.5J British Black + Potenza RE-11 225/255 + SACHS Performance + H&R ARBs + ACS bodykit + Brembo Gran Turismo Brake Kit 355-6F/345-4R + Rogue Engineering IKON exhaust kit + Simota Intake V2 + MFD Scoops + Blackline w/ red bulbs + PIAA H11 4700K fog + PIAA 6500K White Angel Eyes + PIAA H-492 license plate LED + GS-55 front doors LED + Valentine-1

02-08-2009, 11:34 AM	#4
kcleung Private Drives: E90 323 Join Date: Oct 2008 Location: Hong Kong Posts: 97 iTrader: (0)	think manufacturer usually quote cold psi numbers, if you want to be clinical abut this, get a pressure gauge and a pump. you might want to consider nitrogen as well. __________________ http://picasaweb.google.com/leung.keic/MyCars# http://picasaweb.google.com/leung.ke...xperience2008#

02-11-2009, 08:38 AM	#7
Minichamps Second Lieutenant Drives: E91 330i Delivered June 27 '07 Join Date: Oct 2006 Location: Hong Kong Posts: 277 iTrader: (0)	Does anyone check this label? http://www.convertunits.com/from/bar/to/psi __________________

02-11-2009, 09:25 AM	#8
little_croco Lieutenant Colonel Drives: E90 330i Monaco Blue/Beige Join Date: Nov 2007 Location: Hong Kong Posts: 1,963 iTrader: (0) View little_croco's Garage	yes wor, I usually maintain them at around 40psi... __________________ E90 330i VB36 Monaco Blue/Beige/BurledWalnut - Prodrive GC-014I Forged 18" 8.5J/9.5J British Black + Potenza RE-11 225/255 + SACHS Performance + H&R ARBs + ACS bodykit + Brembo Gran Turismo Brake Kit 355-6F/345-4R + Rogue Engineering IKON exhaust kit + Simota Intake V2 + MFD Scoops + Blackline w/ red bulbs + PIAA H11 4700K fog + PIAA 6500K White Angel Eyes + PIAA H-492 license plate LED + GS-55 front doors LED + Valentine-1

01-29-2009, 06:26 AM	#3
Bimmer /E93 In The Flesh Drives: E93 323i (Modified) Join Date: Nov 2008 Location: Hong Kong Posts: 99 iTrader: (0)	I have 19" 235/30 front and 255/30 Rear. Tyre pressure varies depending on temp/season... I run mine at 35PSI front, 33PSI Rear In general tires lose 1-2 PSI per month in hot weather, you might want to add a +1PSI to your current setup than.

02-11-2009, 10:52 AM	#9
william_cwl Private First Class Drives: 2008 E91 Join Date: Aug 2008 Location: HK Posts: 122 iTrader: (0) View william_cwl's Garage	2.7 bar is 39psi.... i guess it's a recommendation for very smooth roads and highway? i dun think it's acceptable for rough roads like hk! __________________

02-11-2009, 08:43 PM	#10
Black Pig Private Drives: E90 320i Join Date: Jan 2008 Location: Hong Kong Posts: 53 iTrader: (0)	I am using Front: R19/35/235 - Hankook S1EVO 34PSI Rear: R19/30/265 - Hankook S1EVO 36PSI actually i am also wondering if my setting is correct or not........

02-11-2009, 10:46 PM	#11
little_croco Lieutenant Colonel Drives: E90 330i Monaco Blue/Beige Join Date: Nov 2007 Location: Hong Kong Posts: 1,963 iTrader: (0) View little_croco's Garage	i will be a consideration of balancing off ride comfort and gas consumption __________________ E90 330i VB36 Monaco Blue/Beige/BurledWalnut - Prodrive GC-014I Forged 18" 8.5J/9.5J British Black + Potenza RE-11 225/255 + SACHS Performance + H&R ARBs + ACS bodykit + Brembo Gran Turismo Brake Kit 355-6F/345-4R + Rogue Engineering IKON exhaust kit + Simota Intake V2 + MFD Scoops + Blackline w/ red bulbs + PIAA H11 4700K fog + PIAA 6500K White Angel Eyes + PIAA H-492 license plate LED + GS-55 front doors LED + Valentine-1

02-12-2009, 12:29 AM	#12
kcleung Private Drives: E90 323 Join Date: Oct 2008 Location: Hong Kong Posts: 97 iTrader: (0)	umm, after how bmw brag about their 50-50 weight ratio, they recommend different tyre pressures front and rear (also for 225/45 size)?? __________________ http://picasaweb.google.com/leung.keic/MyCars# http://picasaweb.google.com/leung.ke...xperience2008#

02-16-2009, 11:46 AM	#13
ArktisE92 Private First Class Drives: E92 (Sold) / GT3RS / SLK55 Join Date: May 2008 Location: 852 Posts: 136 iTrader: (0)	I run 33 and 35 psi on my 19" 235/35 and 275/30 Mich PS2s (measured cold). But then I prefer a slightly heavier steering. The nose gets considerably lighter as you go from 32 to 34-35. I used to run 32 all around to make the ride more comfy for the HK Island roads. But I went for the better handling after a while, comfort be damned

02-17-2009, 01:11 PM	#14
dannygenio Banned Drives: 2008 E92 Flaming Red Join Date: Feb 2009 Location: Philly Posts: 567 iTrader: (0)	lol tyre......

03-20-2009, 01:57 AM	#15
K3VMO New Member Drives: White 335i Conv. Join Date: Jan 2009 Location: Hong Kong Posts: 6 iTrader: (0)	Okies, After bouncing round a few garages and asking numerous mechanics... it turns out the general consensus is the settings I'm running: 36 PSi (Front) & 38 PSi (Rear). You can tweak it +/- 2 PSi either way depending on your preference for handling.