Home Forums Articles How To's FAQ Register
Go Back   Xoutpost.com > BMW SAV Forums > X5 (E70) Forum
Fluid Motor Union
User Name
Password
Member List Premier Membership Search Today's Posts Mark Forums Read

Xoutpost server transfer and maintenance is occurring....
Xoutpost is currently undergoing a planned server migration.... stay tuned for new developments.... sincerely, the management


Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 11-04-2019, 02:46 PM
Member
 
Join Date: Jul 2018
Location: St. Louis MO
Posts: 34
Ralphhall is on a distinguished road
Tire wear

I posted this on Bimmerfest, so maybe a duplicate...appoligies if so.
My outer edge of front tires is 90% gone. Tires were on car when I bought, so I do not know how previous driver drove the car. There is 5/16-6/16 tread in the middle, so much life left on tire. I was told due to stiff suspension, this is going to happen. This is a 2012 X5 5.0 with Sport Activity package and staggered wheels/tires. Any suggestions. Iíve ordered new front and will have an alignment.
Reply With Quote

Sponsored Links

  #2  
Old 11-04-2019, 08:33 PM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 5,634
ard is on a distinguished road
DO NOT use a BMW dealer for alignment.


I saw a blowhardy comment about how 'only BMW dealers know how to align BMWs'. Nothing is further from the truth.


I started a thread on alignments: https://www.bimmerfest.com/forums/sh...d.php?t=668729


If you go to a dealer they will set it mid spec, and tell you 'thats just the way BMWs are, its _______".... and in the blank, insert: stiff suspension; performance; racing history; handling; blah blah blah


Set your toe to 0.01 to 0.02 each wheel
Set camber to mid spec. You can tolerate a bit more camber up fron with the 50.


Set your inflation pressure up front a bit higher than the door- like 2psi more.


Thats it.
Reply With Quote
  #3  
Old 11-05-2019, 02:46 AM
Member
 
Join Date: Aug 2016
Location: Brooklyn, NYC, NY
Posts: 336
robnitro is on a distinguished road
Yep the inflation pressures manufacturers recommend are usually a few psi too low and leave the middle of the tread worn less than the sides.
On run flats its even worse because the sidewalls are harder so a higher pressure helps the middle get contact.
Reply With Quote
  #4  
Old 11-05-2019, 11:54 AM
ard ard is offline
Member
 
Join Date: Mar 2006
Location: Sierra Foothills, California
Posts: 5,634
ard is on a distinguished road
Quote:
Originally Posted by robnitro View Post
Yep the inflation pressures manufacturers recommend are usually a few psi too low and leave the middle of the tread worn less than the sides.
On run flats its even worse because the sidewalls are harder so a higher pressure helps the middle get contact.
And it is exacerbated with a big v8 up front, combined w smaller tires on the staggered set up...


you've got a ton of weight, plowing the tires around- with less pressure the sidewalls get rolled over and scrubbed to death.


IMO BMW sets pressure a bit low to give a nice soft ride too. Not, as we are often told, 'because BMW engineers hold performance above everything else'



Last edited by ard; 11-05-2019 at 01:04 PM.
Reply With Quote
  #5  
Old 11-09-2019, 10:30 PM
Member
 
Join Date: Jan 2018
Location: Charleston, SC
Posts: 134
Baby Unicorn Taco is on a distinguished road
Quote:
Originally Posted by ard View Post
And it is exacerbated with a big v8 up front, combined w smaller tires on the staggered set up...


you've got a ton of weight, plowing the tires around- with less pressure the sidewalls get rolled over and scrubbed to death.


IMO BMW sets pressure a bit low to give a nice soft ride too. Not, as we are often told, 'because BMW engineers hold performance above everything else'




I agree with the replies above. Inflate a few psi above what the door states. Also check you tire manufacture dates stamped on the side. Older tires will wear faster. BMW specs on alignments are awful. Read ardís thread. Request specific specs.


Sent from my iPhone using Xoutpost.com
Reply With Quote
Reply

Bookmarks

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
Trackbacks are On
Pingbacks are On
Refbacks are On





All times are GMT -4. The time now is 07:24 AM.
vBulletin, Copyright 2019, Jelsoft Enterprises Ltd. SEO by vBSEO 3.6.0
© 2017 Xoutpost.com. All rights reserved. Xoutpost.com is a private enthusiast site not associated with BMW AG.
The BMW name, marks, M stripe logo, and Roundel logo as well as X3, X5 and X6 designations used in the pages of this Web Site are the property of BMW AG.
This web site is not sponsored or affiliated in any way with BMW AG or any of its subsidiaries.