THE LARGEST BMW 2-SERIES FORUM ON THE PLANET
2Addicts
2Addicts
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read
2Addicts | BMW 2-Series forum BMW 2 Series (F22) Forum BMW 2 Series Coupe and Cabriolet (F22/F23) General Forum Runflat Tires?

Post Reply
 
Thread Tools Search this Thread
      03-02-2015, 03:37 AM   #1
huma
Private First Class
huma's Avatar
6
Rep
126
Posts

Drives: F22 one day
Join Date: May 2014
Location: Mars

iTrader: (0)

Runflat Tires?

BIMMERPOST
     Featured on BIMMERPOST.com
For some reason, I thought all the RFT that came from the factory were Michelins. Mines came with Bridgestone S001.

In the door jam, it says cold psi at 32 for the front and 38 for the rear. The dealer had them at 40 for both. I lowered it to the door specs, but I'm confused if this is the right pressure if they have been using different stock tires before. On the tires itself, it says max psi of 51.
Appreciate 0
      03-02-2015, 04:03 AM   #2
myc132
Private
12
Rep
67
Posts

Drives: 2015 M235i Convertible
Join Date: Jan 2015
Location: California

iTrader: (0)

The non-Run Flats are Michelins and I don't remember off the top of my head but I do believe the run flats are either Bridgestones or Pirellis so it sounds right.
__________________
On Order: M235i Convertible Alpine White - all options minus HK sound and auto high beams.
Appreciate 0
      03-02-2015, 04:57 AM   #3
x5mad
Major
x5mad's Avatar
25
Rep
1,144
Posts

Drives: F30 328i
Join Date: May 2009
Location: Australia

iTrader: (0)

My 328 came with bridgestones. I think another option they use is continental.

Dealers always seem to pump up the tires too high. Mine always come back from service with at least 40 psi. I have adaptive suspension so I don't feel it so much but in previous bmws I noticed the harsh ride straight away.

From lots of trial and error I find 35psi all round is a good number for comfort and tire wear.
Appreciate 0
      03-02-2015, 06:21 AM   #4
mfourn20
Private First Class
7
Rep
129
Posts

Drives: 228i M Sport
Join Date: Jun 2014
Location: Warwick, RI USA

iTrader: (0)

My 228 m sport came with bridgestone summer only runflats..never bothered to check what psi they were at before I took them off.
Appreciate 0
      03-02-2015, 09:49 AM   #5
DGR TSR
New Member
0
Rep
5
Posts

Drives: BMW 328i Coupe
Join Date: Jan 2015
Location: Sonoma Coast

iTrader: (0)

I purchased a M235i with Michelin Pilot Super Sport tires.

The tires are great, but we live very far from any tire repair shop.

Can I in future years put (hopefully Michelin) run-flats on the same rims?

Last edited by DGR TSR; 03-02-2015 at 09:49 AM. Reason: clarity
Appreciate 0
      03-02-2015, 11:28 AM   #6
2msport
Second Lieutenant
6
Rep
270
Posts

Drives: 228i MT
Join Date: Apr 2014
Location: California

iTrader: (0)

I have those S001s and that's what I set them too. 32. 38. On the tire it says MAX of 51. Meaning when thy warm up. Stick with the door jam cold pressure and you should be fine.
Appreciate 0
      03-02-2015, 11:31 AM   #7
pikcachu
Colonel
pikcachu's Avatar
49
Rep
2,020
Posts

Drives: M235i (F22 Red angel)
Join Date: Jul 2011
Location: undisclosed

iTrader: (0)

i found lot of dealers will just inflate tires to 40psi square even non-bmw dealers.... not sure why
Appreciate 0
      03-02-2015, 11:34 AM   #8
gaijin
Mess Cook
gaijin's Avatar
Philippines
42
Rep
415
Posts

Drives: Z4; M235i at sea
Join Date: Feb 2013
Location: Florida

iTrader: (0)

Quote:
Originally Posted by huma View Post
In the door jam, it says cold psi at 32 for the front and 38 for the rear.
Yes, you are correct. Proper tire air pressure is determined by the vehicle manufacturer and is set to best fine-tune a tires capabilities to their specific vehicle make and model. Using what BMW has on the door jam decal is the smart and safe way to go.
__________________
/// 2015 F22 M235i / Estoril Blue II / Black Dakota / 6MT / ZTP / ZPP / M Performance LSD / 494 / 674 / ZDM / ACA
Appreciate 0
      03-02-2015, 11:48 AM   #9
Sportstick
Captain
Sportstick's Avatar
44
Rep
714
Posts

Drives: '15 228i/Track Pkg/6MT/VO
Join Date: Mar 2014
Location: Michigan

iTrader: (0)

Yes, the door jamb values are safe, However, they may be overkill. They are the mandated values which correspond to the maximum load of the vehicle. If you have the full load permitted of passengers and cargo, these would be the proper values to use. Notice the same label shows the full capacity for seating as well as the maximum load weight which go along with those pressures.

OTOH, the max cold pressure stamped in the sidewall is not a value related to operating usage...it is the value which is the max capability of the tire to contain air pressure when cold.

I haven't had a chance to go back into the owner manual, but there may be a listing for ordinary usage (driver...little to no cargo) which is likely in the mid 30s, depending on the aspect ratio of the tire. But, if you find the max setting isn't too harsh and bumpy, it's within safe operating limits.
Appreciate 0
      03-02-2015, 02:31 PM   #10
MG 228i
Private First Class
10
Rep
105
Posts

Drives: 228i M Sport
Join Date: Aug 2014
Location: Los Angeles

iTrader: (0)

I have S001s also.

I feel the car understeers at 32F / 38R.
I am now running 36F / 38R and see if that makes a difference.
Appreciate 0
      03-02-2015, 07:04 PM   #11
nike001
BMW Product Specialist
United_States
10
Rep
80
Posts

Drives: 2004 330i ZHP
Join Date: Apr 2011
Location: US

iTrader: (0)

Quote:
Originally Posted by x5mad View Post
Dealers always seem to pump up the tires too high. Mine always come back from service with at least 40 psi. I have adaptive suspension so I don't feel it so much but in previous bmws I noticed the harsh ride straight away.

From lots of trial and error I find 35psi all round is a good number for comfort and tire wear.
The car's come from BMW pumped up to nearly max tire pressure (high 50's-low 60's). When the tech's take the new cars in for PDI they take the spacers out of the suspension & deflate the tires.

Quote:
Originally Posted by MG 228i View Post
I have S001s also.

I feel the car understeers at 32F / 38R.
I am now running 36F / 38R and see if that makes a difference.
The stock values are set up to understeer since understeer is a lot easier to manage than oversteer. The closer you get to even front-back pressures, the more neutral your car will seem.

I run 36/38 on my ZHP now and it's pretty ideal & neutral feeling.
__________________

On Order: M235i 6MT Estoril Blue/Black
ZCW, ZPP, ZTP, H/K, M-Performance LSD + Diffuser
Appreciate 0
      Yesterday, 01:08 AM   #12
HarmOG
Enlisted Member
1
Rep
31
Posts

Drives: BMW 228
Join Date: May 2014
Location: Newport Beach, CA

iTrader: (0)

Has anyone else noticed that the tires seem to deflate faster than normal? I've put on about 6500 miles and have had to pump up the tires a few times.
Appreciate 0
      Yesterday, 02:06 AM   #13
Kiwi
First Lieutenant
New Zealand
10
Rep
390
Posts

Drives: 2014 BMW 116i M Sports
Join Date: May 2005
Location: Auckland New Zealand

iTrader: (0)

Your suppose to check the tires regular and haven driven some 6500 miles they should have been more than just a few times. I've actually found run flats don't lose hardly any air. You can program the car to show just a small drop in air. Once you programmed the car then come back with how often you pump air in. Next thing you guys will require an alarm and why not as your guys need seat belt, lights left on, keys left in the car, park brake is on alarms.
__________________
2014 BMW 116i M Sports Auto Black Sapphire
2015 BMW 220 M Sport Black Sapphire Auto Convertible delivery May
Appreciate 0
Post 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 10:15 AM.




2addicts
2addicts
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, 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