Tirerack
Use the following links to go directly to useful tirerack winter items: Tirerack Winter Tires. Gary's Winter Tire FAQ.
Using the links directly supports E90Post with tirerack sales commision!

  E90Post
 


TireRack

   PLEASE HELP SUPPORT E90POST BY DOING YOUR TIRERACK SHOPPING FROM THIS BANNER, THANKS!
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Wheels and Tires Forum Sponsored by The Tire Rack > Non run flat psi tire pressure?



Wheels and Tires forum Sponsored by The Tire Rack
Please help to directly support e90post by doing your tirerack shopping from the above link. For every sale made through the link, e90post gets sponsor support to keep the site alive. Disclaimer

Wheel offset calculator courtesy of BimmerPost.com. You may use this calculator to calculate what tire sizes you might need if you upgrade your tires, or what wheel sizes/offsets are compatible with your car.
    Current Wheel Width  inches             Current Wheel Offset  mm.
         New Wheel Width  inches                  New Wheel Offset  mm.
 
TIRE WIDTH
/
ASPECT RATIO
- WHEEL DIAMETER
ORIGINAL TIRES
/
NEW TIRES
/
Based on your stock wheel setup, your new wheel will have:
Original Tires Diameter (in.)
      New Tires Diameter (in.)
  Difference in diameter (in.)
           Percent Difference %
                     
Speedo @60mph will read: mph
Collapse/Expand the BimmerPost Wheel and Tire calculator
Reply
 
Thread Tools Search this Thread
      09-08-2012, 05:29 AM   #1
nav1111
New Member
 
Drives: Bmw 335d Se Auto Black
Join Date: Aug 2012
Location: Nottingham

Posts: 13
iTrader: (0)

Non run flat psi tire pressure?

Hi Guys,

Just after some advice, what's the recommended tire pressure psi for non run flats on a 335d?
nav1111 is offline  
0
Reply With Quote
      09-08-2012, 09:58 AM   #2
Tom K.
Major General
 
Tom K.'s Avatar
 
Drives: '07 328iT, '13 Boxster
Join Date: Mar 2008
Location: Maryland

Posts: 5,357
iTrader: (0)

Start with the recommended pressures found on the door jamb sticker for OEM RFTs in the size you are using. If you find the resultant handling feel to be a bit too soft, then add about 3 psi - but do not exceed the maximum cold pressure printed on the tire.

Tom
Tom K. is offline   United_States
0
Reply With Quote
      09-08-2012, 07:25 PM   #3
cdgatti
Major
 
cdgatti's Avatar
 
Drives: e90 328i
Join Date: May 2011
Location: KY

Posts: 1,025
iTrader: (4)

I have had good luck going 4 psi above the "100 mph" pressure suggested for your car. You can find this on the door (yellow sticker) or in the manual.
cdgatti is offline  
0
Reply With Quote
      09-08-2012, 09:59 PM   #4
chromisdesigns
Lieutenant Colonel
 
Drives: 2008 BMW 335i sedan
Join Date: Jan 2010
Location: San Francisco

Posts: 1,752
iTrader: (0)

Try 38 psi all around and see how you like that. It's worked for me for a while now. I used to run the same on my E36 M3 with good results, too.

Factory pressures are definitely too low for "real" tires, unless you like wallowing around on them like a hog in mud. They are BMW's pathetic attempt to moderate the horrible OEM ride with runflats.
chromisdesigns is offline  
0
Reply With Quote
      09-09-2012, 02:04 PM   #5
nav1111
New Member
 
Drives: Bmw 335d Se Auto Black
Join Date: Aug 2012
Location: Nottingham

Posts: 13
iTrader: (0)

I'm running with 41 psi front and 46 on the back. You think that's fine?
nav1111 is offline  
0
Reply With Quote
      09-09-2012, 02:41 PM   #6
chromisdesigns
Lieutenant Colonel
 
Drives: 2008 BMW 335i sedan
Join Date: Jan 2010
Location: San Francisco

Posts: 1,752
iTrader: (0)

Quote:
Originally Posted by nav1111 View Post
I'm running with 41 psi front and 46 on the back. You think that's fine?
Seems a bit high to me -- I'd expect your tires to show excess wear in the middle at those pressures. How's the handling?

Maybe running max load, I don't know, still might be a bit much...
chromisdesigns is offline  
0
Reply With Quote
      09-10-2012, 02:36 AM   #7
sathoro
Second Lieutenant
 
Drives: E90 335i
Join Date: Mar 2012
Location: Austin, TX

Posts: 231
iTrader: (0)

Quote:
Originally Posted by nav1111 View Post
I'm running with 41 psi front and 46 on the back. You think that's fine?
Damn. Seems a little high
__________________

'10 E90 335i | Black Sapphire Metallic | Black Dakota Leather | M Sport | Premium | Cold Weather
JB4 | Alpina B3 TCU | CF Splitters | CF Performance Spoiler | CF Trim
sathoro is offline  
0
Reply With Quote
      09-10-2012, 03:00 AM   #8
nav1111
New Member
 
Drives: Bmw 335d Se Auto Black
Join Date: Aug 2012
Location: Nottingham

Posts: 13
iTrader: (0)

I'm running that at full load as suggested on the psi indicator sticker. I've been told to run non flats slightly higher? Ok so 38 psi should be fine then? I've noticed the steering is a lot lighter since the change.
nav1111 is offline  
0
Reply With Quote
      09-10-2012, 02:04 PM   #9
jcarv20s
Private First Class
 
Drives: 2008 335xi Coupe
Join Date: Apr 2012
Location: Manchester, CT

Posts: 111
iTrader: (0)

I run 40 all around.
jcarv20s is offline  
0
Reply With Quote
      09-10-2012, 02:31 PM   #10
chromisdesigns
Lieutenant Colonel
 
Drives: 2008 BMW 335i sedan
Join Date: Jan 2010
Location: San Francisco

Posts: 1,752
iTrader: (0)

Quote:
Originally Posted by nav1111 View Post
I'm running that at full load as suggested on the psi indicator sticker. I've been told to run non flats slightly higher? Ok so 38 psi should be fine then? I've noticed the steering is a lot lighter since the change.
For full passenger load + bags, that's fine then. I run mine higher on loaded trips, too. Normally, with just the two of us and light luggage, I'll run 38 all around.

Yep, steering response is much better with non runflats at the higher pressures.
chromisdesigns is offline  
0
Reply With Quote
      09-10-2012, 10:48 PM   #11
Vreimann
Private First Class
 
Drives: 2011 335D M-Sport
Join Date: Mar 2012
Location: Canada

Posts: 137
iTrader: (0)

Quote:
Originally Posted by nav1111 View Post
I'm running that at full load as suggested on the psi indicator sticker. I've been told to run non flats slightly higher? Ok so 38 psi should be fine then? I've noticed the steering is a lot lighter since the change.
There is a little arrow on the side of the PSS which you should just barely be able to scrub on good cornering. Mark some chalk and go for a drive and see where you scrub. I've found the tires for city driving are nice at 35-36 front and 39-41 back. Any higher is adjusted for long hauling highway driving.

Your temperature ranges may result different pressures.
__________________
2011 335D
Vreimann is offline   Canada
0
Reply With Quote
      09-12-2012, 09:55 AM   #12
sbce90
Me Boosta
 
sbce90's Avatar
 
Drives: 320i / MB C63 / VW up!
Join Date: Jan 2010
Location: Sydney, Australia

Posts: 5,390
iTrader: (3)

I normally run around 37 or 38 psi, if its hot then 40.
sbce90 is offline   Australia
0
Reply With Quote
      01-09-2013, 01:19 AM   #13
jzy11
New Member
 
Drives: e90 323
Join Date: Dec 2012
Location: HK

Posts: 23
iTrader: (0)

I run 33 / 41 as per door jamb sticker

Seems like jamb stickers recommend different tire pressures for different countries
jzy11 is offline  
0
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -5. The time now is 11:17 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST