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Suspension & Braking
Have some questions about suspension or brake setups for your E46 BMW? Get all your answers here!

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Old 04-08-2013, 06:03 PM   #1
bmwnick
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Unhappy Rear Tire Problem

Hey all, new member, first post. I've read all sorts of threads on this site before and decided it was time to become a member. That being said, I have an 02 330i and am eating the rear tires on the inside tread. I have put in an adjustable camber kit, new trailing arm bushings (powerflex) and have had 2 alignments done. Still having a problem. I should mention the car is lowered, I do not know what brand of springs as I've only owned the car for about 6 months. Shocks are good, all other bushings seem to be good. Alignment tech says every time he adjusts my camber arms, it throws the toe out of whack which is why I'm eating tires. He can't find a "happy medium" where it would compliment even tire wear. We're both at a loss as of where to go from here. Any info would be greatly appreciated!
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Old 04-12-2013, 12:06 PM   #2
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Your alignment tech is a tool.

Go to an experiensed shop and get a proper alignment. Inside tire wear is due to incorrect toe setting.

Its not a rocket science to align a lowered bmw,go to someone who knows what he is doing

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Old 04-12-2013, 12:14 PM   #3
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Originally Posted by Blocked Out View Post
Your alignment tech is a tool.

Go to an experiensed shop and get a proper alignment. Inside tire wear is due to incorrect toe setting.

Its not a rocket science to align a lowered bmw,go to someone who knows what he is doing

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This explanation is more or less incorrect and largely over-simplified.

First off, OP, make sure your tech aligns toe last. If he does camber last, it will throw off toe. Any alignment tech should know this. Second, a degree of inner tire wear on a BMW is NORMAL and occurs due to toe PLUS camber which is what the stock BMW alignment calls for high-speed stability and to encourage slight understeer. "Incorrect toe" in and of itself will not cause excess inner tire wear. A degree of negative or positive camber in combination with + or - toe will do the trick.

So in a nutshell, without seeing pics of your wear, it's hard to say. But do expect some inner tire wear to occur on a BMW alignment. These cars are designed to perform, but it comes at a cost.
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Old 04-12-2013, 03:58 PM   #4
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Thanks for the info guys! I cannot get pictures right now as it is still in the shop, but I was aware of the degree of negative camber for performance and I expect some wear to the inside tread, but I would say I'm replacing tires after 5k miles because they are so badly worn on the inside. I'm not an aggressive driver (for the most part). I get most of my parts from bavauto, and they have told me after a camber kit, rtabs and alignments that I should replace my shocks with Billsteins as they provide a higher compression and might do the trick? Or I could bring the car back to factory ride height by installing OE springs. I'm tired of spending $$ on suspension problems and getting no results! Plus I like the look of my lowered 330. But with some input I may be persuaded to go ahead with the other options? I had Billsteins on both my 318's and didn't care much for them.
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Old 04-13-2013, 10:19 AM   #5
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This explanation is more or less incorrect and largely over-simplified.

First off, OP, make sure your tech aligns toe last. If he does camber last, it will throw off toe. Any alignment tech should know this.
So he's incorrect then you state essentially the same thing? Having to tell an alignment tech how to align a car basically indicates the tech is a tool.
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Old 04-14-2013, 03:15 AM   #6
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So he's incorrect then you state essentially the same thing? Having to tell an alignment tech how to align a car basically indicates the tech is a tool.
It's a commonly repeated myth/misconception that toe causes excess tire wear. Toe + camber causes excess tire wear. Stock BMW alignment calls for both, more so in the rear.
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Old 04-14-2013, 09:26 AM   #7
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To be honest, you might want to buy some adjustable control arms depending on how low you are, that way you can adjust your toe more effiently with your camber alignment. Although, depending on the shop, they should be able to get u pretty close

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Old 04-15-2013, 05:41 PM   #8
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I already have SPC adjustable control arms 03BimmerM3
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Old 04-15-2013, 07:10 PM   #9
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My mechanic is now talking about doing some modifications to the carrier mount around the trailing arm bushings to get a little more toe into the rear. Basically just doing some mill work to the slots where the bolts join to the chassis. Have you guys ever heard of a process like this? I trust him completely but I must say I'm a little apprehensive about something like this...
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Old 04-15-2013, 08:00 PM   #10
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You should post up an alignment sheet.
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Old 04-15-2013, 08:20 PM   #11
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Here is the most recent Alignment report, apologies if it's difficult to read
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Old 04-16-2013, 12:42 AM   #12
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My mechanic is now talking about doing some modifications to the carrier mount around the trailing arm bushings to get a little more toe into the rear. Basically just doing some mill work to the slots where the bolts join to the chassis. Have you guys ever heard of a process like this? I trust him completely but I must say I'm a little apprehensive about something like this...
I can't recall your car's history, but it seems your RTABs are either worn or installed incorrectly. You need a new alignment tech. Do not modify anything.
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Old 04-16-2013, 12:44 AM   #13
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Also you say your car is lowered but has the stock shocks? If I am understanding that correctly, you are butchering your car. Big part of the reason why it won't align right. If you lowered it so much that you need aftermarket control arms, you've introduced major problems as well as neglected maintainence-related ones. You need to rethink everything that is on your car
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Old 04-16-2013, 09:25 PM   #14
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+1 with Mango, if you have aftermarket shocks, id find another mechanic, because the whole purpose of adj control arms is to help adjust toe

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