Dumb question: Different tires front to back w/ xDrive

dannyhavok · 03-04-2017, 08:28 PM

Hey all,

Just grabbed a set of used Style 269's with Pirelli PZero run flats. The two rears are brand new, but the fronts are basically toast... both are worn and one is badly damaged. Is it safe to run Non-RFT summers in the same size, or do I need to track down exact replacements?

Thanks!

Dan

rick100 · 03-05-2017, 12:15 AM

as far as i know as long as the front tires are the same and the rear tires are the same you should be good. However you can not have two different tires in the same axle

Bluewater328iT · 03-05-2017, 08:43 AM

I'd put run flats on if you are replacing tires, unless you intend to eventually have go flats on all fours. The AWD, ABS, and DSC are designed assuming that all four tires are the same. A run flat has a stiffer sidewall than a go flat, so I don't think it will react exactly the same as a run flat, but it could be close. I would not take a risk on a safety item like tires.

terryd5150 · 03-05-2017, 10:07 AM

I've run different tires on the front vs. back on a 335xi before.

No issues.

JUST8AV8 · 03-09-2017, 10:15 PM

Quote:

Originally Posted by terryd5150

I've run different tires on the front vs. back on a 335xi before.

No issues.

+1 No issues.

03-04-2017, 08:28 PM	#1
dannyhavok Lieutenant 133 Rep 514 Posts Drives: '11 E90 328xi 6MT Join Date: Jun 2014 Location: Victoria, BC iTrader: (0)	Dumb question: Different tires front to back w/ xDrive Hey all, Just grabbed a set of used Style 269's with Pirelli PZero run flats. The two rears are brand new, but the fronts are basically toast... both are worn and one is badly damaged. Is it safe to run Non-RFT summers in the same size, or do I need to track down exact replacements? Thanks! Dan
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03-05-2017, 12:15 AM	#2
rick100 Colonel 551 Rep 2,293 Posts Drives: 328 Join Date: Oct 2013 Location: canada iTrader: (0)	as far as i know as long as the front tires are the same and the rear tires are the same you should be good. However you can not have two different tires in the same axle
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03-05-2017, 08:43 AM	#3
Bluewater328iT Lieutenant 87 Rep 471 Posts Drives: 2011 BMW 328iT Join Date: Jan 2014 Location: New Rochelle, NY iTrader: (0)	I'd put run flats on if you are replacing tires, unless you intend to eventually have go flats on all fours. The AWD, ABS, and DSC are designed assuming that all four tires are the same. A run flat has a stiffer sidewall than a go flat, so I don't think it will react exactly the same as a run flat, but it could be close. I would not take a risk on a safety item like tires. __________________ BMWCCA member since 1990 Mods: 330 intake, ECU reflash & tune, Magnaflow cat back resonator & muffler, BMW Euro airbox, tinted windows
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03-05-2017, 10:07 AM	#4
terryd5150 Head Fry Cook at McBurgertown 507 Rep 1,005 Posts Drives: 2015 435i M-Sport 6MT Join Date: May 2015 Location: Greenville, SC iTrader: (9)	I've run different tires on the front vs. back on a 335xi before. No issues.
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