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View Full Version : What PSI do you inflate your tires?



Kibokojoe
04-25-2009, 02:32 PM
I have always inflated mine to 32 psi

h2oyo
04-25-2009, 02:57 PM
I have always inflated mine to 32 psi

On the inside of door frame of the drivers side door is there recommended tire inflation's. I have always just used that. It will cover several different tire sizes and inflation's.

BMW4LIFE
04-25-2009, 03:33 PM
28 / 32 with pure nitrogen

Kibokojoe
04-25-2009, 04:40 PM
What does the nitrogen do?

///Sniper535
04-25-2009, 05:43 PM
more stable during temperature changes

russiankid
04-25-2009, 06:08 PM
32/35.

Tiger
04-25-2009, 06:50 PM
Air is like 80% nitrogen... but oxygen is the variable that expands when heated up... so hot tire always has more PSI... same for super cold winter and PSI falls.

Pure Nitrogen is more stable and used by all racing cars. They can't have tire pressure changing on them while racing.

I never used it... didn't want to pay for it.

632 Regal
04-26-2009, 12:02 AM
I go right between the 2 options with 1-2 lbs more in front due to the extra weight of the V8 the lower setting the front tires wear on the outside edges of the front tires. you can go with the minimal settings. More pressure on the rear is for more controll in cornering. 32/32 square is wrong for these cars.


On the inside of door frame of the drivers side door is there recommended tire inflation's. I have always just used that. It will cover several different tire sizes and inflation's.

bsell
04-26-2009, 03:39 AM
39F/41R, keeps the lowered suspension-negative camber, excessive inside wear at bay. (Man, what an ugly sentence!)

I've had good success with this for the two years I've owned the car. These pressures worked with the 18" setup, the stock 15"ers, and the E39 16"ers on there now.

Granted I am in Germany and can drive at 100+mph at will...the car does feel squishy at lower pressures though. Not something I want when driving at speed!

Brian

P.S. I run the same pressures with my '08, sport suspended, 17" wheeled car. Damn, run flats!

mikell
04-26-2009, 11:03 AM
36 front /40 rear.

BMW4LIFE
04-26-2009, 03:48 PM
I never used it... didn't want to pay for it.

that why you buy your tires at costco!

especially when they have 70 bucks off 4 tires!

free rotation
free flat repair
prorated tread wear if you wear your tires below the warranty
and so much more

only crappy part is that the wait might be a long time cause they are always busy =/

Russell
04-27-2009, 11:05 AM
32/35.

32/35 or 33/33 seems to work. Higher in rear seems to be more neutral handling. I think!

Tiger
04-27-2009, 11:15 AM
Yeah, I know all about them. Last time I went there, they told me they are not allowed to install anything other than OEM size tires... so that was the last time I went there because immediately I convinced my uncle to go 50/50 on tire mounting machine for his garage shop and I do my own tires since then.

Tire will lose pressure no matter when so I don't want to drive over there and have them top it out... They are probably a stickler too for OEM specified tire pressure too and I don't want to run them low either. I'd just start up my little compressor and done in 5 minutes.

As for tire wear and warranty... I never bother for that. In my experience and my driving habit... tires last longer than usable lifetime...years and I'd rather try other tires when the years comes up.

GJPinAU
04-27-2009, 06:37 PM
40 all round on 18's
Was sick of cracking/breaking wheels on pot holes!

philbyil
05-01-2009, 03:49 PM
Been running these pressures for the past 10 years on stock wheels.
Tyre wear is perfect, handling is a tad toward oversteer, which is how I like it :) !