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Thread: Tire Pressures in 2020

  1. #1

    Tire Pressures in 2020

    Hello all, my tire pressure light came on a few days ago, and I decided to fill them up. I am running 225/40 and 255/35 michelin pilot SS.

    Is there any correct psi to fill them up at? I got a variety of opinions throughout different forums so I simply did 33psi in the front and 36psi in the rear. Seems as if all my tires had been at 32psi.

    Any feedback would be greatly appreciated!
    1991 E30 Alpinweiß 325iX [SOLD]
    2005 E46 Sparkling Graphite Metallic 330Ci ZHP 6spd

  2. #2
    33/36 is what I would run.

  3. #3
    Join Date
    Nov 2014
    Location
    Portland, OR
    Posts
    9,300
    Quote Originally Posted by Dano516 View Post
    Hello all, my tire pressure light came on a few days ago, and I decided to fill them up. I am running 225/40 and 255/35 michelin pilot SS.

    Is there any correct psi to fill them up at? I got a variety of opinions throughout different forums so I simply did 33psi in the front and 36psi in the rear. Seems as if all my tires had been at 32psi.

    Any feedback would be greatly appreciated!
    See my old thread on it if you want some historical values: http://www.zhpmafia.com/forums/showt...Be-Inflated-To

  4. #4
    Join Date
    Oct 2017
    Location
    NH - The Live Free or Die State
    Posts
    791
    it rarely gets remembered but and don't forget to check your spare........... 60 psi (61 for the convertibles)
    - Pete


  5. #5
    Join Date
    Dec 2019
    Location
    Burlington, NC
    Posts
    150
    You should use the manufacturer tire pressures which should be on a label in your door sill. If you are going for max performance, tire pressure will depend on the tire model. Different tires are best at different pressures. Personally, I run 32/35 most of the time but I'll go to 38/38 for cruising and 34/34 for mountain roads.
    330i Base | Mysticblau | Slicktop | 6MT

  6. #6
    I've used Michelin Pilot SS within last 15+ years on E46 with slight negative camber per OEM spec. 32\33F and 34\35R always give me a good balance for traction and tread life since I'm usually the only occupant in the car. Being off 1 PSI makes little difference. Towards the last 10k miles of tire life, I will usually use 31F\31R. I drive normal style for work and weekends. For tread life, I average 30k miles for front and 45k miles on rear. All my tires still needed rotating about mid-life to balance wear. It's important to also avoid lacerating and cracked roads sections when possible. If in doubt, check the door sills.

  7. #7
    Join Date
    Feb 2013
    Location
    Austin TX
    Posts
    5,923
    Quote Originally Posted by thinkpad240 View Post
    I've used Michelin Pilot SS within last 15+ years on E46 with slight negative camber per OEM spec. 32\33F and 34\35R always give me a good balance for traction and tread life since I'm usually the only occupant in the car. Being off 1 PSI makes little difference. Towards the last 10k miles of tire life, I will usually use 31F\31R. I drive normal style for work and weekends. For tread life, I average 30k miles for front and 45k miles on rear. All my tires still needed rotating about mid-life to balance wear. It's important to also avoid lacerating and cracked roads sections when possible. If in doubt, check the door sills.
    Are you using square setup ? I believe so, since you mention tire rotation. Please confirm.
    2005 IR / black / 6MT
    150,000 miles

  8. #8
    No. It's a staggered OEM setup (225/40-18 F and 255/35-18 R) with Michelin PSS, (both tire and wheel ) left to\right only.

  9. #9
    Quote Originally Posted by Fried_Chicken View Post
    33/36 is what I would run.
    Thanks! Seems smooth as of now!
    1991 E30 Alpinweiß 325iX [SOLD]
    2005 E46 Sparkling Graphite Metallic 330Ci ZHP 6spd

  10. #10
    Autozone.com
    Quote Originally Posted by BMWCurves View Post
    See my old thread on it if you want some historical values: http://www.zhpmafia.com/forums/showt...Be-Inflated-To
    Thanks! I think I'm playing it pretty safe in between what parameters have been set in the past.
    1991 E30 Alpinweiß 325iX [SOLD]
    2005 E46 Sparkling Graphite Metallic 330Ci ZHP 6spd

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