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 > Air Pressure Retention in Run Flat Tires



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

Reply
 
Thread Tools Search this Thread
      04-27-2008, 08:47 PM   #1
Sailor
Enlisted Member
0
Rep
40
Posts

 
Drives: '08 E90 328i
Join Date: Jul 2007
Location: Coastal Texas

iTrader: (0)

Air Pressure Retention in Run Flat Tires

I took delivery of my ordered '08 328i on November 7, 2007. To date, the pressure warning system has signaled no pressure loss in any of the tires. I'm unaccustomed to going so long without adding air to tires, but I realize that the thicker side walls of the run flats may slow pressure loss.

Am I missing something about how the BMW pressure monitoring system works and should I start adjusting air monthly (as I do for my other cars), or wait until the car tells me to do so? I've noticed no degradation of handling over the months that I've owned the car; it still feels perfect.

Thanks
Appreciate 0
      04-27-2008, 08:48 PM   #2
aut0sh0cker
meh
aut0sh0cker's Avatar
United_States
34
Rep
1,758
Posts

 
Drives: E92 335i, 997.2 C4S
Join Date: Jan 2008
Location: 91362

iTrader: (2)

just check the pressure with a gauge... if it is low, fill them. so far i have had to fill them twice since december...
Appreciate 0
      04-27-2008, 11:38 PM   #3
Revlis
Now With 33% MORE Sarcasm Free!
Revlis's Avatar
United_States
61
Rep
3,446
Posts

 
Drives: 335is
Join Date: Feb 2007
Location: Seattle Area, WA

iTrader: (0)

Quote:
Originally Posted by Sailor View Post
I took delivery of my ordered '08 328i on November 7, 2007. To date, the pressure warning system has signaled no pressure loss in any of the tires. I'm unaccustomed to going so long without adding air to tires, but I realize that the thicker side walls of the run flats may slow pressure loss.

Am I missing something about how the BMW pressure monitoring system works and should I start adjusting air monthly (as I do for my other cars), or wait until the car tells me to do so? I've noticed no degradation of handling over the months that I've owned the car; it still feels perfect.

Thanks
Actually yeah you might be missing something. The BMWs TPMS is kind of shitty in that it doesn't show you actual pressures and only registers significant or sudden pressure loss. In theory your tires could be a good 5-8 lbs low and it's hard to feel the difference with the firm RFT sidewalls.
__________________

'13 TiAg over Coral, 335is | DCT | Prem | L7 | Nav/Idrive | CA | 19" "-------"

A BMW is Just a Car, it doesn't make you smart, handsome, cool, or wealthy. Get over it.
Appreciate 0
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 06:00 PM.




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