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2010 2011 BMW 5 Series Forum F10 F10 Technical Topics Wheels / Tires / Suspension / Brakes Michelin PSS 245/35/20 and 285/30/20 "K1" Ferrari Spec vs Normal
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      05-27-2012, 10:09 PM   #23
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Quote:
Originally Posted by Alan l. View Post
Here is my new setup. 245/35/20 K1 spec PSS on the left and 285/30/20 non K1 tire on the right. You can see how the shape of the sidewall is slightly more round on the K1 tire.

Thanks for posting your setup!!, most likely I'll be doing the same thing when I get my wheels, thanks
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      05-29-2012, 03:18 PM   #24
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i have the morr v8.2 20s... and i used 255/35/20 285/30/20 standard setup and its great. not sure why you guys want such a narrow tire in the front... bigger size gap will just make the car understeer more.
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      05-29-2012, 03:58 PM   #25
Alan l.
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^^ its because of the Xdrive system. 245/285 has a identical rolling diameter for the front and rear tires which is important for the AWD system.

If i had a RWD 535 i would have gotten 255 up front for sure.

Alan
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      05-29-2012, 05:07 PM   #26
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opps sorry i must have missed xdrive bit
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      07-27-2012, 05:28 PM   #27
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245 vs 255

Sorry i think i had asked this before? I'm about to purchase my tires this week, just want to make sure. So what will be the problem if I buy 255 instead of 245?(fronts) If the rolling diameter has a difference in an AWD, so will this damage anything? Is the difference big enough that may damage anything?
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      07-27-2012, 05:57 PM   #28
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Nobody knows for sure. All I know is that with xdrive you want the front and rear overall diameter to be the same or as close as possible.

Alan
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      07-27-2012, 06:36 PM   #29
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FWIW, Costco will sell these tires, install and balance them, for about $1,300, tax included. Amazing!

While they do not have the Hunter-force balancing machine, they have very new equipment.
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      07-27-2012, 09:16 PM   #30
Alan l.
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costco carries Michelin PSS??? Damn i paid way more than 1300 at Tirerack!

Alan
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      08-02-2012, 08:20 AM   #31
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Non K1 rear tire mounted on a 20x10" wheel 285/30/20
K1 front tire mounted on a 20x9" wheel 245/35/20

Alan

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      08-02-2012, 02:57 PM   #32
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Wow, very nice allan!!!, can't wait for my wheels to come!!! Looks perfect!!! The second wheel on the pic is your fronts? Very nice, cmmon andy!!! Where are my wheels? Lol, hopefully next week pls......!!!! But very nice allan!!! Where did you mount and balance it?
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      08-02-2012, 08:58 PM   #33
Alan l.
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Yep. first two wheels are the front and the one closes to the camera is the rear wheel. Hopefully getting my F10 in the next couple of days so i can finally put on all of my mods!

Alan
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      08-08-2012, 03:53 PM   #34
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Allan I sent you a pm, thanks
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      08-08-2012, 04:21 PM   #35
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Got your reply!!! Thanks
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      09-06-2012, 12:01 PM   #36
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Tire pressure

What are the recommended tire pressure for the fronts and rears for this wheel setup?
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