Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E89 Z4 (2009 - current)

E89 Z4 (2009 - current)

Reply
 
Thread Tools Display Modes
  #1  
Old 11-09-2010, 10:35 AM
Z4golfer's Avatar
Z4golfer Z4golfer is offline
Officially Welcomed to the 'Fest
Location: California
 
Join Date: May 2010
Posts: 334
Mein Auto: 2011 Z4 35is
Correct Tire Pressure?

Last night my tire pressure monitoring system warned that the front driver side tire was low. The weather has just started getting cool so it wasn't a surprise to me.
I checked all four tires and these were the pressure readings.

Left Front: 31.5 PSI
Right Front: 30.5 PSI
Left Rear: 38.0 PSI
Right Rear: 38.0 PSI

I know that you should always inflate the tires to the pressure recommended on the placard inside the drivers door, however I also know the definition of "never". The tires are embossed "Never inflate above 40 PSI".

The placard recommends 38 PSI front and 45 PSI rear.
This morning I filled them to 35 PSI front and 38 PSI rear.
Thanks for any thoughts or suggestions.
Attached Thumbnails
Click image for larger version

Name:	photo-7.jpg
Views:	149
Size:	117.0 KB
ID:	253896  
__________________


2011 Z4 35is
2014 X3 28i

Last edited by Z4golfer; 11-09-2010 at 12:38 PM.
Reply With Quote
Advertisement
  #2  
Old 11-09-2010, 12:36 PM
HerrK's Avatar
HerrK HerrK is offline
Officially Welcomed to the 'Fest
Location: CA
 
Join Date: Jan 2010
Posts: 592
Mein Auto: 2011 Z4 35i
36F & 42R is the recommended pressure for 18" & 19" tires with or without "Sport Package" up to 100 MPH - per the manual. That's what I've been running with good wear results.
__________________


HerrK - Keine Eifelfahrt ohne eine Runde über den Nürburgring

May 2010 ED l 2011 35i l Crimson over Ext'd Coral Red w/brushed Alum l 6sp MT l Prem Sound l Sport Pack l 296's l Comfort Access l Alarm l Power Heated Seats l & Nav.
FrauK - 2014 Q5 TDI - May 2014 ED | Cuvée Silver over Pistachio beige | Premim Plus | MMI | Nav | B&O
Reply With Quote
  #3  
Old 11-09-2010, 12:40 PM
Z4golfer's Avatar
Z4golfer Z4golfer is offline
Officially Welcomed to the 'Fest
Location: California
 
Join Date: May 2010
Posts: 334
Mein Auto: 2011 Z4 35is
It's not 36 F and 42 R on my car. It's 38 F and 45 R
Why would Bridgestone print "Never inflate above 40 PSI" on the tire?
__________________


2011 Z4 35is
2014 X3 28i

Last edited by Z4golfer; 11-09-2010 at 12:42 PM.
Reply With Quote
  #4  
Old 11-09-2010, 01:43 PM
rafale's Avatar
rafale rafale is offline
Officially Welcomed to the 'Fest
Location: Portland, OR
 
Join Date: Oct 2005
Posts: 186
Mein Auto: 11 Z4 35is / 11 535Xi GT
Are you sure it says 40psi and not 50psi. That's what I remember reading on my tires.
__________________
2000 Z3 2.8 TiAg (retired)
2002 330i Orient Blue (retired)
2005 330Ci TiAg (retired)
2009 Z4 30i Space Gray (retired)
2011 Z4 35is Space Gray
2011 535i GT xDrive Space Gray
Reply With Quote
  #5  
Old 11-09-2010, 02:55 PM
Z4golfer's Avatar
Z4golfer Z4golfer is offline
Officially Welcomed to the 'Fest
Location: California
 
Join Date: May 2010
Posts: 334
Mein Auto: 2011 Z4 35is
Yes, they say 40 PSI
Attached Thumbnails
Click image for larger version

Name:	photo-8.jpg
Views:	177
Size:	158.7 KB
ID:	253944  
__________________


2011 Z4 35is
2014 X3 28i
Reply With Quote
  #6  
Old 11-09-2010, 03:03 PM
djfitter's Avatar
djfitter djfitter is offline
Officially Welcomed to the 'Fest
Location: Orange County, SoCal
 
Join Date: Sep 2007
Posts: 5,532
Mein Auto: BMW '08 535i
Quote:
Originally Posted by Z4golfer View Post
Yes, they say 40 PSI
Read the whole thing. It pertains to the mounting/setting of the bead of the tire, not the Max operating pressure.

dj
__________________
'08 535i
Deep Sea Blue
Cream Beige
Dark Poplar
6 Sp Manual
Sport
Premium
Rear Shades

BMW CCA #392316

Last edited by djfitter; 11-09-2010 at 03:06 PM.
Reply With Quote
  #7  
Old 11-10-2010, 05:35 AM
Rolf-Dieter's Avatar
Rolf-Dieter Rolf-Dieter is offline
Alter Peter
Location: North America
 
Join Date: Jul 2009
Posts: 533
Mein Auto: 2012 ///M3 LMB/Black
I have 19 Inch wheels (Type 296) and after my ordeal in Idaho last summer (having a flat due to the driver-side rear wheel having a crack and finding out the passenger side also had 2 hairline cracks). In addition I found out that my wheels had worn prematurely on the inside. I was advised by the Tire Shop in Idaho and BMW (at the time 18,000 KM on the odometer) as follows:-

Idaho Tire Shop; Inside tire wear on a car like mine is expected and they have seen it many a times. Cause; is the roof and luggage weight in the trunk. Recommendation; add 4 PSI to the rear tires to wear the rest of the tread evenly.

My Canadian BMW Dealership; After e-mailing my Service Manager with attached photographs. Recommendation; Inflate rear tires 10% above specified rear tire pressure and I should make it home okay (some 3,000 KM to go), no other explanation was given at the time. By the time I made it home I just had slightly more then 21,000 KM on the odometer.

The rest of the story; Tires are still holding out at 26,000 KM on the odometer now. Winter tires are on order from Tire Rack then my RFT will be history since another set for the summer will be ordered. The wheel with 2 hairline cracks was changed by my Canadian BMW Dealer without question. I finally got contacted by BMW about the wheel with the crack that resulted in a flat and was changed in Idaho. This wheel I had to pay for due to Canadian/USA warranty conflicts. I plan to update the forum later once I have a resolution from BMW Customer Relations.

Meanwhile my now Bridgestone RFT summer tire on 19 inch wheels will be inflated Front 35 PSI Rear 45 PSI (due to premature inside tire wear).

My Winter tire/wheel 18x8 set will be inflated to recommended pressure for the Michelin Ice tires I ordered.

My Summer tire/wheel 19x8 Front and 19x9 Rear set will also be inflated to recommended pressure (still have not made up my mind if they will be Continentals or Michelin).

As a guide I use TireRack Guide Lines CLICK
__________________

Driving mt 2012 /// M3 LMB & Black Leather Interior Fully Loaded
I drove a Z4 35i across the USA in 2010 & loved it.
Somehow I just had to get back into the /// M3 and so I did.
Reply With Quote
  #8  
Old 11-10-2010, 09:29 AM
Z4golfer's Avatar
Z4golfer Z4golfer is offline
Officially Welcomed to the 'Fest
Location: California
 
Join Date: May 2010
Posts: 334
Mein Auto: 2011 Z4 35is
Quote:
Originally Posted by djfitter View Post
Read the whole thing. It pertains to the mounting/setting of the bead of the tire, not the Max operating pressure.

dj
Thanks djfitter.
You're right, I didn't read the whole thing. Max pressure is 51 PSI
__________________


2011 Z4 35is
2014 X3 28i
Reply With Quote
  #9  
Old 11-10-2010, 02:39 PM
rmorin49's Avatar
rmorin49 rmorin49 is offline
Officially Welcomed to the 'Fest
Location: Hagerstown, MD,
 
Join Date: Jan 2007
Posts: 4,111
Mein Auto: 2011 335d
Give the difference in price I would go with the Continental DW. Michelins are good tires but overpriced. My 2 cents.
__________________

Colonel (Ret) US Army / Hagerstown, MD
1985 M635 Euro Alpine White/Pacific Blue (Fun Car)
2010 Z4 s30i Alpine White/Beige
2013 Audi A6 Ibis White/Nougat (Daily Driver)
2013 Audi A4(Ret)
2011 335d (Ret)
2009 335i vert (Ret)
2007 335i vert (Ret) ED 04-13-10
2000 740iL (Ret)
1998 328iC (Ret)
1990 535i (Ret)
1988 635CSi (Ret)

https://plus.google.com/photos/10999...COHGu-rlyIrrLg
Reply With Quote
  #10  
Old 11-12-2010, 09:31 AM
BlueZ4AZ BlueZ4AZ is offline
Officially Welcomed to the 'Fest
Location: Chandler, AZ
 
Join Date: Jul 2009
Posts: 322
Mein Auto: 2009 Z4 sDrive 35i
Quote:
Originally Posted by rmorin49 View Post
Give the difference in price I would go with the Continental DW. Michelins are good tires but overpriced. My 2 cents.
The last set of Michelin PS2s I had on my previous car (2007 Corvette) still had thousands of miles of tread left after being driven slightly over 20k miles and performed excellent. In my opinion they are well worth the price. My expectations were exceeded. I will be putting them on the Z4 sometime in the next few months.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E89 Z4 (2009 - current)
Today's Posts Search
Thread Tools
Display Modes

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 -7. The time now is 09:18 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms