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///M3 Forum
The BMW E46 ///M3 is the M version E46 and puts out an amazing 333 HP and 262 lb-ft of torque at stock specs! There are an amazing amount of modifications for both the coupe and convertible models so read up and get started modifying your cars today!

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Old 04-26-2005, 08:36 PM   #1
xkrnxnamjahx
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Exclamation Tire Pressure

I just set mine at 38 front and 40 rear

i have 2003 BMW M3 with SMG transmission, 18'' stock OEM rims with Michelin pilot sports tires.

I just installed a system in the back (200 lbs)

and i have usually 2 - 3 people in my car.

What's the best tire pressure? or is 38 front and 40 rear perfect for my car?
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Old 04-26-2005, 10:33 PM   #2
bengwie
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should be inside the manual,
I have 19 inch OEM rims, and I set mine 33 front and 35 rear. Should be in the manual, but I forgot for your rim's size.
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Old 04-27-2005, 01:35 AM   #3
gpoints
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Quote:
Originally Posted by xkrnxnamjahx
I just set mine at 38 front and 40 rear

i have 2003 BMW M3 with SMG transmission, 18'' stock OEM rims with Michelin pilot sports tires.

I just installed a system in the back (200 lbs)

and i have usually 2 - 3 people in my car.

What's the best tire pressure? or is 38 front and 40 rear perfect for my car?
That's what I'm running with OEM 19's...
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Old 04-27-2005, 06:15 AM   #4
DXBBimmer
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its all in the manual... READ!
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Old 04-27-2005, 07:51 AM   #5
///M3Pilot19
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Quote:
Originally Posted by DXBBimmer
its all in the manual... READ!
seriously I think some people just wait on this board to say "READ THE MANUAL!!" or SEARCH. Yea, the manual has recommended tire pressure for OEM wheels.. I'm quite sure alot of people experiment and try different setups. For the record I try to keep my 19s at 37fr 39rear.
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Old 04-27-2005, 10:03 AM   #6
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Quote:
Originally Posted by bengwie
should be inside the manual,
I have 19 inch OEM rims, and I set mine 33 front and 35 rear. Should be in the manual, but I forgot for your rim's size.
Is that the pressure you used to run with your 68M wheels when you had the 330?

The manual for my car (330) says 32F/38R, but I've found 34F/36R to be a good compromise between comfort, handling & wear. The rears seemed to be wearing too much in the middle at 38R and the fronts just seemed a little low at 32F.

I'm surprised at 33F/35R for the 19's, I would think that's too low for protecting the rims from bends, but I don't have them so
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Old 04-27-2005, 12:43 PM   #7
BlackE46M3
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I run mine about 37 all the way around and tire wear has been great but I am going to experiment with 38 rear/36 Front and see how that works out. Probably not that much of a difference.

When I autocrossed the car last weekend I had them cranked up to 45 all around!
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Old 04-27-2005, 12:57 PM   #8
xkrnxnamjahx
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umm i know what the OEM recommended tire pressure is. I was just looking for the ride + comfort, or any other combination.
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Old 04-27-2005, 11:55 PM   #9
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What is your driving style? I typically drive agressive and tend to keep my rears 2psi less than the book. Fronts are usually kept at the recommended rate. This has essentially been the same for all of my BMW's and been a pretty good setup for my style of driving.
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Old 09-12-2009, 01:24 AM   #10
Amuse M3
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41/48

Do not know, I set mine at 41 front 48 in the back, great performance, but not sure it is too high?
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Old 09-12-2009, 08:33 AM   #11
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Originally Posted by Amuse M3 View Post
Do not know, I set mine at 41 front 48 in the back, great performance, but not sure it is too high?
Seems pretty high to me. I run 36psi all around on OEM 19's.
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Old 09-14-2009, 01:06 AM   #12
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yo i have 19''s and i run 31/36 because i don't usually carry more than 2 people, its all about the weight i think more people more psi.
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Old 09-14-2009, 01:09 AM   #13
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It depends if you're carrying a lot of people and luggage or not. Since only half the time I have passengers, I put it in the middle... about 34 front, 38 rear. Seems to work fine...
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Old 09-14-2009, 04:57 PM   #14
daleatty
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Mine have been set at 36F and 38R for a while. Seems to work well. I have not noticed any bad tire wear (PS1's on stock 18s).
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Old 09-14-2009, 09:46 PM   #15
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Borrow a pyrometer and check inside, center and ourside tread temperatures immediately after a typical trip with typical load. Raise or lower pressures to achieve a balanced temperature across these three tread zones. There is no pat answer to your question where one answer fits all uses and styles of driving.
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Old 09-14-2009, 09:49 PM   #16
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plan driving thats fine, if ur tracking the car aroud 43 pounds all round
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