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E85 / E86 Z4 (2003-2008)
E85 Z4 Roadster, E86 Z4 Coupe, E85 Z4 M Roadster, and E86 Z4 M Coupe talk with our BMW gurus here.

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  #1  
Old 07-15-2013, 06:02 PM
brock5ga brock5ga is offline
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Location: Monroe, GA
 
Join Date: May 2012
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Mein Auto: Z4
Tire Wear Even Front to Rear?

03 Z4 3.0i Sport Package. Put on lift last week for oil change to find 2 bald rear tires. Purchased vehicle @ 12k miles ago. Negotiated front tires when purchased. Currently has oe run flats on vehicle all 4 locations. Rear tires looked good when purchased, but never measured tread depth to verify life. Going non run flat and have found some good rebates on 4 tire purchases. I thought I had read somewhere that these cars tend to use 2 sets of rear tires to a set of front tires, similar to my bike. If this is the case, I would just purchase 2 tires and use the remaining life of the front tires. If everyone's experience is that they wear pretty evenly, I will purchase 4 and take advantage of the rebates. May be able to offset the purchase with the sale of the fronts that are still about half life. Also have a set of BC coilovers that I plan on installing at the same time.

Thanks in advance for the input. Could not find any info searching the forum.
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  #2  
Old 07-15-2013, 06:28 PM
pokeybritches pokeybritches is offline
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Location: Gulf Coast
 
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Mein Auto: 06 Z4MR, 03 Z4 3.0i
My sport package Z4 3.0i uses two sets of rear tires to one set of front. A lot of your use will depend on driving style.

I wouldn't mix non-RFT and RFT. I did to save money, and the car handled poorly until I swapped the fronts to non-RFT too.
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  #3  
Old 07-16-2013, 02:37 AM
brock5ga brock5ga is offline
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Location: Monroe, GA
 
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Mein Auto: Z4
Quote:
Originally Posted by pokeybritches View Post
My sport package Z4 3.0i uses two sets of rear tires to one set of front. A lot of your use will depend on driving style.

I wouldn't mix non-RFT and RFT. I did to save money, and the car handled poorly until I swapped the fronts to non-RFT too.
The tracking and the wet traction from the front are horrible since the tires have hit about half life and we have been bombarded with rain all year long. Just trying to save a few bucks. Top motor went out last month. Can't imagine that it would handle much more poorly than it is now.
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  #4  
Old 07-16-2013, 06:41 AM
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imz4n imz4n is offline
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Location: OC, CA.
 
Join Date: Oct 2005
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Mein Auto: 06 3.0 si Z4R
rear camber is what makes the car handle so well. Tire wear or handling, it's a trade off for sure.
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  #5  
Old 07-16-2013, 08:18 AM
ShakyDog ShakyDog is offline
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Location: Missouri
 
Join Date: Sep 2011
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Mein Auto: Z4 3.0i (sold the X3)
Quote:
Originally Posted by pokeybritches View Post
My sport package Z4 3.0i uses two sets of rear tires to one set of front. A lot of your use will depend on driving style.

I wouldn't mix non-RFT and RFT. I did to save money, and the car handled poorly until I swapped the fronts to non-RFT too.
This has also been my experience.

Steve
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  #6  
Old 07-17-2013, 02:52 AM
brock5ga brock5ga is offline
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Location: Monroe, GA
 
Join Date: May 2012
Posts: 96
Mein Auto: Z4
Went ahead and ordered 4 Eagle F1 Asymmetric 2's. Should be in this week. Will try to go in and install BC Coilovers and tires next week on my day off. Will check and set alignment to specs then.
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  #7  
Old 07-17-2013, 05:58 AM
STIHLBOLTS STIHLBOLTS is offline
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Location: Georiga
 
Join Date: Feb 2008
Posts: 1,021
Mein Auto: 2008 Z4MR
Any car that has off set sized wheels and tires seems to have the same issue with 2 to 1 use ratio on front vs rear. I still had my OEM Front's at 38k with a bunch of thread and was on my 2nd set of rears.

I got a year and almost 10k on these Michelin PSS and they still look new. Also a great water tire, I have been really happy with them.

Regards
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  #8  
Old 07-17-2013, 08:15 AM
tohbi tohbi is offline
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Location: arizona
 
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Mein Auto: z3 '97 atlanta blue 2.8
i was just in the shop yesterday discussing the difference in tire wear.

would the sport package make a difference, other than the tires being staggered? what is the sport package anyway?

at what point do we start thinking about spring sag?
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  #9  
Old 07-17-2013, 09:10 AM
ShakyDog ShakyDog is offline
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Location: Missouri
 
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Mein Auto: Z4 3.0i (sold the X3)
Sport Package gets you: staggered wheels/tires, tighter suspension, higher shift point when engaged on Automatic, remaps the accelerator to send input to throttle quicker and adjust the steering to quicker ratio.

Steve
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  #10  
Old 07-17-2013, 05:41 PM
brock5ga brock5ga is offline
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Location: Monroe, GA
 
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Mein Auto: Z4
Quote:
Originally Posted by STIHLBOLTS View Post
Any car that has off set sized wheels and tires seems to have the same issue with 2 to 1 use ratio on front vs rear. I still had my OEM Front's at 38k with a bunch of thread and was on my 2nd set of rears.
This is what I was looking for. I could swear that the rear tires were practically brand new also when I purchased it. Never pay them much attention since you can't really see the tread. I used the front as a gauge, and when the oil change was due, surprise!!! Will probably just list the front 2 for sale. Thanks for the input. It also sounds like I will be glad that I ordered 4.
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  #11  
Old 07-30-2013, 05:51 PM
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bten bten is offline
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Location: Missouri City, TX
 
Join Date: Sep 2002
Posts: 957
Mein Auto: '08 Z4 3.0si
Quote:
Originally Posted by pokeybritches View Post
My sport package Z4 3.0i uses two sets of rear tires to one set of front. A lot of your use will depend on driving style.

I wouldn't mix non-RFT and RFT. I did to save money, and the car handled poorly until I swapped the fronts to non-RFT too.
+1,

I did the same thing and had the same result. drove the DSC nuts...
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