|
|
|
10-28-2009, 12:39 AM | #1 |
First Lieutenant
46
Rep 332
Posts |
what PSI should I fill the tire pressure to?
I don't have my manual easily accessible to me.
I have the M-Sport package wheels and tires. Had the car for about 3 months now - and today I got a warning light for my front left tire saying i have low pressure. Drove to a Costco w/ Maintenance section - the tire pressure gauge was showing a 31.2 psi. The max for the tire says 51psi. I filled it to 40. What's the standard PSI for front and rear tires? |
10-28-2009, 12:55 AM | #2 |
Private First Class
19
Rep 196
Posts |
On the back of the door jam for the drivers side there is a sticker with the recommended tire inflation pressures for your car, it has a table with tire sizes and corresponding pressures depending on size. That is a good guideline to follow. The 51 psi is just an "absolute max pressure" that the tire can safely withstand. Remember that as ambient temp changes, so does tire pressure, and if you factor in the heat increase caused by friction as the wheels roll pressure will surely increase. If youre on the highway on a hot day, your tire pressure will go up dramatically due to heat, and friction, and these conditions combined with an initial high tire pressure can lead to blowouts.
__________________
Scream till you like it.
|
Appreciate
0
|
10-31-2009, 08:15 PM | #3 |
Private First Class
4
Rep 112
Posts |
So little information..... what are you driving, a 135i coupe? what tire size(s)?
Tire pressure should be measured cold, i.e. after not driving for at least 4-6 hours..... Once you drive a few miles, tire pressure goes up as the tire gets warm -- typically 5 psi or more. So your 31.5 psi tire is really 27 psi cold, which is way way too low for any 128i or 135i tire, especially a RFT. For 17" tires, 33 kpsi (measured cold) Front, 36 kpsi Rear For 18" tires, 36 kpsi Front, 39 kpsi Rear William |
Appreciate
0
|
12-30-2009, 11:11 AM | #9 | |
Private First Class
9
Rep 119
Posts
Drives: 135i N54
Join Date: May 2005
Location: Bay Area, CA
|
Quote:
Anyone know why the tire pressures have changed? From what I understand the tires themselves did not change nor did the weight and or weight distribution of the car. |
|
Appreciate
0
|
12-30-2009, 11:48 AM | #10 |
Colonel
381
Rep 2,926
Posts
Drives: Cayman GT4, 135i
Join Date: Apr 2008
Location: NJ
|
on the same topic i'm running bridgestone blizzaks lm-25
on my 135i size 225/40/18 all around what psi should i run 33/36 ?
__________________
Current: M2CS
Gone but not forgotten: Cayman GT4, M2C, 2011 135i, E83 X3 6MT, 2016 SO M3, 2012 335iS, 2010 135i and 2006 e90 325xi |
Appreciate
0
|
12-30-2009, 04:33 PM | #11 |
Private First Class
4
Rep 112
Posts |
For the Blizzaks on 18 inch wheels I would run either 33/36 or 36/39, depending on what kind of ride you want (I would go with the higher PSI myself)
As for the door jamb vs. the online manual, I think the 135i has uneven F/R tire pressures, like 33/36, or 36/39, etc. I have never seen 36 all around recommended in any of my literature, but I don't think I looked at the paper book that came with the car. Even with identical 205/50 R17s on every corner the car should be 33/36. |
Appreciate
0
|
12-30-2009, 06:38 PM | #12 |
General
2038
Rep 25,989
Posts |
Play around with the tire pressures. Depending on your driving style and weather conditions, PSI will vary +/- 2-3. 38-40 PSI should be something nice to keep the car around.
-Charles@VMRWheels
__________________
VMR|Wheels | 714.442.7916 |
sales@velocitymotoring.com | www.velocitymotoring.com | facebook | flickr | Instagram |
Appreciate
0
|
01-04-2010, 06:25 PM | #13 | |
AutoXer
34
Rep 683
Posts |
Quote:
__________________
2009 135i, Alpine White, 6MT, M-Sport, iDrive, iPod/USB, Heated Seats, Premium Sound, BMW Assist
|
|
Appreciate
0
|
03-17-2014, 05:30 PM | #14 | |
New Member
0
Rep 28
Posts |
Even BMW learns through our experience
Quote:
The below came directly from the U.S. owners manuals for respective years and applies to the 135i coupe with 215/40/18 and 245/35/18 tires (Sport package) only, but should cause readers to think of why BMW has evolved. 2008 - 2009: never over 100mph: 36/36, exceed 100mph without luggage: 36/36, exceed 100mph with luggage: 38/42 2010 - 2013: never over 100mph: 36/39, exceed 100mph with or without luggage: 38/42 Why did they change? Experience and consumer feedback. They haven't changed the tires since the beginning of the 1 series, but they have changed the recommended pressures. We should consider this and follow their updated recommendations for safety, performance, economy, hydroplaning. You may sacrifice some ride comfort, but if that's what you're after, you might consider an Audi or Volvo or Mercedes. Last edited by keithbickford; 03-17-2014 at 06:31 PM.. Reason: Refinement through research |
|
Appreciate
0
|
03-17-2014, 05:46 PM | #15 |
European Editor
10528
Rep 22,992
Posts |
OP your best bet to to experiment with different tire pressures. One thing I noticed is even just a few psi will make a huge difference on how your car rides. Especially with RFT's.
Since I live in Germany the roads here are glass smooth and I always drive in the double digits. So I always set my tires for MAX on the door jam label. Normally that's 2.4 bar(front) and 2.8 bar(rear). What ever pressure you set your tires too... DO NOT FORGET to reset the TPMS system. Its a "dumb" system, so once you get the warning light, simply adding air to the tires will not turn the TPMS warning off. You HAVE TO RESET the TPMS system. First check your tires for the proper tire pressure. THEN... with the car stopped(but engine running), hold and reset the TPMS via the turn signal stalk. Then drive off. It should only take a few hundred meters(if that!) of driving before the yellow light goes out. You can also use the iDrive menu to do that same thing. IF you try resetting the TPMS while driving it will not reset. Ask me how I know that! lol Good Luck, Dackel
__________________
|
Appreciate
0
|
03-17-2014, 08:07 PM | #16 |
New Member
0
Rep 28
Posts |
Dackel, I wish I could say the same about the U.S. People here love to modify to ultra low profile tires, but our roads, especially in the north, truly call for monster truck tires. I trashed the shocks on a new car driving at 120mph on an interstate highway through Arkansas.
|
Appreciate
0
|
03-17-2014, 08:43 PM | #17 | |
European Editor
10528
Rep 22,992
Posts |
Quote:
Just to rub it in... a picture of the poor condition of the Italian Autostrada, from last week driving from Geneva/Turin/Verona.
__________________
|
|
Appreciate
0
|
03-18-2014, 09:50 AM | #18 |
Private
29
Rep 98
Posts
Drives: 2011 128i Sport 6MT Ti Silver
Join Date: Jun 2013
Location: ITB, Raleigh, North Carolina
|
Buy a tire pressure gauge. Every car owner should have one. Moroso makes a good one that is accurate and easy to use. It's about $45.00.
http://ecx.images-amazon.com/images/I/41zACPZhkTL.jpg
__________________
'11 BMW 128i 6MT
Titanium Silver, Sport Package, Cold Weather Package, Sunroof, Sensatec DISA Intake, AA Header, MILV's, Stage FP Tune, VAC Motorsports Quaife LSD, CDV Delete, M3 Upper and Lower Front Control Arms, Powerflex Yellow RSFB’s, "Square" Tire/Wheel Set Up: Michelin PS A/S 3 225/45 17"'s on 17"x7.5" Type 262's |
Appreciate
0
|
03-18-2014, 01:07 PM | #20 |
General
2038
Rep 25,989
Posts |
To say that I am jealous of these road conditions is an understatement.
__________________
VMR|Wheels | 714.442.7916 |
sales@velocitymotoring.com | www.velocitymotoring.com | facebook | flickr | Instagram |
Appreciate
0
|
03-18-2014, 02:42 PM | #21 | |
Resident Tamed Racing Driver
298
Rep 4,697
Posts |
BMW recomended tire pressures in the US are now max load PSI thanks to lawyers.
Quote:
Roads were really nice when I was in Italy two weeks ago, and the cops don't care about speeding in the slightest.
__________________
2005 E46 M3 Interlagos/Cinnamon with Sunroof Delete
|
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|