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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 07-17-2011, 08:35 PM   #1
Rubenk
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2000 323ci driver rear tire inside tire wear, causes?

So I noticed some roaring when I went to the store earlier, got there and suspected a low tire. They all looked good so I looked underneath, and boy am I glad I did!!

My driver-side rear tire, has steel showing on the inside. The rest of the tire and the passenger side are all decent looking. I started measuring around and my tire-fender gap is different on each side. All other measurements are identical. Measured camber on each side and it looked same. Wheel is centered on the body as well.

I had the rear subframe repair done by a BMW dealer about 6 months ago, but otherwise have not done any rear suspension work since I bought it a year ago. Its a 5spd with 125k miles.

Here are a few pictures, not sure if they help at all. Let me know if you need pics of anything else.

driver rear tire.

Driver side rear


Passenger Rear, measured from the ground.

Last edited by Rubenk; 07-17-2011 at 08:39 PM.
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Old 07-17-2011, 09:02 PM   #2
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Dude, when was the last time you had a four wheel alignment, I get mine aligned every 15,000 miles or after I purchase a new set of tires or do suspension changes. Just my two and a half cents worth...
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Old 07-17-2011, 09:06 PM   #3
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I'm quite sure the dealer did an alignment. They changed out the lcabs the same time as the rear subframe repair. So around 8k miles ago.

I figured if the alignment was *that* bad more than one tire would be chewed up? It drives as straight as an arrow.
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Old 07-17-2011, 09:25 PM   #4
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You think you got it bad?

http://forum.e46fanatics.com/showthr...506&highlight=

After replacing the FCAB's and RTAB's with powerflex and having an allignment done made it perfect again.
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Old 07-17-2011, 09:31 PM   #5
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The don't think they did such a good job on your driver's side rear alignment. The tire wear is an indicator that your alignment on that wheel is off. Looks like your rear driver's side camber needs adjustment. Independent race shops do a much better job aligning bimmer's than the dealerships. Just my two and a half cents worth...
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Old 07-18-2011, 12:51 AM   #6
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I would say alignment or possible RTAB's if they havent yet been replaced
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Old 07-18-2011, 05:14 AM   #7
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The inside rear tire always wears first on the E46 due to the camber settings. So, to some extent this is normal but your wear seems excessive.
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Old 07-18-2011, 11:38 AM   #8
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I dont guess I was aware that each wheel could be aligned independently of the rest. I'm too used to 4x4's with solid axles!

What exactly is the RTAB and how can I verify if that is an issue? I'll get it to an alignment shop asap.

Looks like I need new tires too...wooooo...

Thanks everybody!
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Old 07-18-2011, 12:09 PM   #9
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A RTAB is a rear trailing arm bushing which is the bushing assembly for the rear of the vehicle versus the front control bushing assembly. The alignment shop should be able to tell you whether your RTAB requires replacement as well. Just my two and a half cents worth...
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Old 07-18-2011, 12:11 PM   #10
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Alignment.

Or too many fat chicks and/or dead hookers in your trunk.
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Old 07-18-2011, 12:27 PM   #11
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lol thanks guys, I'll lay off the fat hookers and get er aligned!
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Old 07-18-2011, 02:40 PM   #12
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hard to say, but yes BMW was suppose to align the cars after doing the subframe fix.

when measuring height, you're suppose to measure from the cetercap (or top of rim) to the fender if you want to see how much it's off in height. height doesn't mean the alignment's off though
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Old 07-18-2011, 02:46 PM   #13
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Quote:
Originally Posted by Alex323Ci View Post
hard to say, but yes BMW was suppose to align the cars after doing the subframe fix.

when measuring height, you're suppose to measure from the cetercap (or top of rim) to the fender if you want to see how much it's off in height. height doesn't mean the alignment's off though
Measuring from the centercap showed the same difference in height. Maybe its just normal sag for a 12 year old car?

I have an appointment with my dealer this friday to get it on the alignment rack and see what the deal is.

Also, does my car look lowered? I havent compared it to a known stock car to verify...

Thanks again everybody!
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