replacing a rear tire

SCL_///M3 · 07-24-2012, 05:31 PM

Hi guys,

One of my rear tire is punctured and needs to be replaced. my car has about 9k miles on it. the good rear tire still has about 6mm tread depth (Conti sports contact 3) My understanding is that a brand new tire has about 7-8mm tread depth, so do i need to replace both of them or just the punctured one? I was told by a BMW mechanic that the difference between the rear tires will be absorbed by the rear differential which is not recommended. So, i wanted to hear all your opinions. To replace both or just the bad one?

Thanks for any input.

geneatals · 07-24-2012, 06:10 PM

replace both

pseto · 07-24-2012, 08:05 PM

replace both and keep one for a spare

gatorfast · 07-25-2012, 09:29 AM

Why can't he just replace one since the other tire has plenty of tread left?

I recently replaced only one front tire and my car rides just fine.

pseto · 07-25-2012, 11:14 AM

Quote:

Originally Posted by gatorfast

Why can't he just replace one since the other tire has plenty of tread left?

I recently replaced only one front tire and my car rides just fine.

Because what we don't know is how the tire has worn. It may have 6mm of tread, but probably not evenly across the entire tire. I'm fairly certain that after 9k miles, there's some level of uneven wear. This is the main reason I always buy tires in pairs.

Obviously he can get just 1 tire, but I would at least make sure both are road-forced balanced.

Richbot · 07-25-2012, 12:44 PM

Good excuse to replace all 4 with something that doesn't suck, and sell the 3 good tires

07-24-2012, 05:31 PM	#1
SCL_///M3 Enlisted Member 20 Rep 44 Posts Drives: E92 M3 Join Date: Mar 2010 Location: Canada iTrader: (0)	replacing a rear tire Hi guys, One of my rear tire is punctured and needs to be replaced. my car has about 9k miles on it. the good rear tire still has about 6mm tread depth (Conti sports contact 3) My understanding is that a brand new tire has about 7-8mm tread depth, so do i need to replace both of them or just the punctured one? I was told by a BMW mechanic that the difference between the rear tires will be absorbed by the rear differential which is not recommended. So, i wanted to hear all your opinions. To replace both or just the bad one? Thanks for any input.
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07-24-2012, 06:10 PM	#2
geneatals Ninja 390 Rep 4,014 Posts Drives: 2019 530e Join Date: Dec 2007 Location: So Cal (SFV) iTrader: (3)	replace both __________________ 2019 AW G30 530e l ZPP l ZMP l ZDH Retired: 2016 F80 M3, 2012 E90 M3, 2008 535i
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07-24-2012, 08:05 PM	#3
pseto Major General 811 Rep 7,750 Posts Drives: E92 M3 ZCP, F80 M3 ZCP- beater Join Date: Jun 2006 Location: Rockville, MD iTrader: (4)	replace both and keep one for a spare __________________ Paul Seto - BMW Car Club of America President, National Capital Chapter (MD/DC/NoVA) Director, National Events ///M Chapter Become a BMW CCA member; Click HERE to join and use my member #339225 for a referral Join our NCC Facebook Page
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07-25-2012, 09:29 AM	#4
gatorfast Major General 4996 Rep 6,863 Posts Drives: 718 Cayman Join Date: Jan 2008 Location: SoFla iTrader: (4)	Why can't he just replace one since the other tire has plenty of tread left? I recently replaced only one front tire and my car rides just fine.
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07-25-2012, 12:44 PM	#6
Richbot Major General 2760 Rep 5,483 Posts Drives: Jerez Black E90 Join Date: Sep 2007 Location: STL iTrader: (5)	Good excuse to replace all 4 with something that doesn't suck, and sell the 3 good tires __________________
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