XBimmers X1   XBimmers X1
  XBimmers X1

Go Back   XBimmers | BMW X1 Forum > BMW X1 Forums > General BMW X1 (E84) Forum

Post Reply
 
Thread Tools Search this Thread
      01-09-2014, 10:42 AM   #23
peter123
New Member
3
Rep
26
Posts

Drives: 2014 X1 xDrive 28i Sport
Join Date: Feb 2013
Location: Tacoma, WA

iTrader: (0)

Quote:
Originally Posted by MrT-Man View Post
I don't think there are sensors on the wheels? I thought the tire pressure monitor worked by measuring rotational speed.
A Canada vs US difference.
Appreciate 0
      01-09-2014, 12:45 PM   #24
halfmoonclip
First Lieutenant
40
Rep
336
Posts

Drives: X1 28i
Join Date: Nov 2013
Location: westsylvania

iTrader: (0)

Quote:
Originally Posted by peter123 View Post
A Canada vs US difference.
My bride's Audi uses rotational speed to determine tire pressure problems; it seems a good system, and requires no reset when changing from winter to summer tires.
I don't understand why more makers don't use this system; it seems to have a lot going for it.
Moon
Appreciate 0
      01-09-2014, 07:44 PM   #25
BeEmVe
Lieutenant
United_States
258
Rep
565
Posts

Drives: '14 X1 x28i M-Sport
Join Date: Sep 2013
Location: on the road to perdition

iTrader: (1)

Quote:
Originally Posted by tccox View Post
Interesting. I live in Charlotte and Tuesday morning it was down to 6 Deg F. Got in car and got low pressure warning for all four wheels. They look fine and car drove fine so I proceded cautiously to work. When I got home that afternoon it had warmed up to 27 Deg F. I let tires cool and checked pressure. To my surprise they were spot on the correct tire pressure, not low a bit. I'm finding it hard to believe that a Delta T of 21 degrees would be enough to trigger the warning. I did the reset thing and all has been well since then
The colder temp difference you are describing are enough to cause enough of a psi drop.

As for the pressure check that was made this afternoon I bet though you thought the tires were cold they there were not. Check in the morning and see. I bet the pressure will be down a few psi down.
Appreciate 0
      01-09-2014, 08:46 PM   #26
squishy
Banned
Zimbabwe
153
Rep
388
Posts

Drives: 2014 Ford Mustang GT
Join Date: Nov 2013
Location: Running away from an ocean vagina

iTrader: (0)

Quick question for you all:

Are you supposed to follow BMW's recommendation and fill the fronts up more than the rear (can't remember exactly, but I think it's 28psi front/35psi rear)? Also, if this isn't the case and one is supposed to fill all 4 of them to 35psi, would this go for aftermarket wheels and tires as well, or not?

Thanks in advance!
Appreciate 0
      01-09-2014, 11:45 PM   #27
Twix
Lieutenant Colonel
Twix's Avatar
Canada
652
Rep
1,922
Posts

Drives: 2011 e91
Join Date: Jan 2013
Location: Calgary, AB, Canada

iTrader: (0)

Garage List
With aftermarket wheels, go with what's on your door jamb. I would monitor wear and adjust as needed.
__________________
2011 E91
2016 M2 - Sold
2014 X1 - Sold
2002 Land Rover Discovery II - 3" lift & 33s
Appreciate 0
      01-09-2014, 11:50 PM   #28
Teutonic
Colonel
Teutonic's Avatar
No_Country
2706
Rep
2,350
Posts

Drives: BMW
Join Date: Feb 2012
Location: Canada

iTrader: (0)

Quote:
Originally Posted by MrT-Man View Post
I don't think there are sensors on the wheels? I thought the tire pressure monitor worked by measuring rotational speed.
To be honest, I never open the oem wheels with RFT so I don't know, but I do know that my M wheels with Non-RFT don't have sensors.

From the X1 manual:

The system must have been reset while the inflation pressure was correct; otherwise, reliable signaling of a flat tire is not ensured.
Always use wheels with TPM electronics to ensure that the system will operate properly.
Reset the system after each correction of the tire inflation pressure and after every tire or wheel change."

Pag79
Appreciate 0
      01-10-2014, 11:19 AM   #29
squishy
Banned
Zimbabwe
153
Rep
388
Posts

Drives: 2014 Ford Mustang GT
Join Date: Nov 2013
Location: Running away from an ocean vagina

iTrader: (0)

Quote:
Originally Posted by Twix View Post
With aftermarket wheels, go with what's on your door jamb. I would monitor wear and adjust as needed.
Thanks!
Appreciate 0
      01-10-2014, 02:16 PM   #30
halfmoonclip
First Lieutenant
40
Rep
336
Posts

Drives: X1 28i
Join Date: Nov 2013
Location: westsylvania

iTrader: (0)

Squishy, you may well want to tune your car's handling as well if you go with tires other than runflats...I've read here that using other than runflats may lead to increased understeer; a situation perhaps helped by putting more air in the front tires than is called for on the door jamb.
Several million years ago, in college with my VW Bug, I found I could settle its desire to oversteer excessively by putting extra air in the rear tires...
Carmakers all have their own theories on the matter; my bride's A4 Audi calls for substantially more air in the front tires...
Moon
Appreciate 0
      01-10-2014, 09:31 PM   #31
Mtpisgah
Private First Class
14
Rep
148
Posts

Drives: 2010 WRX & 2013 X1
Join Date: Mar 2013
Location: Greenville, SC

iTrader: (0)

The temps are getting back to the normal winter temp of 50 so I will check the pressure tomorrow and adjust accordingly. I really haven't noticed any difference in handling of the car during this time.
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



All times are GMT -5. The time now is 05:17 PM.




xbimmers
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
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