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Old 26th October 2006, 12:46   #1
Blue Thunder
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Rear wheel alignment?

My car wears its rear tires very unevenly as you can see in this picture:



The car is lowered so maybe that comes into play.

What are my options to even out the wear - has the rear suspension any alignment options to compensate for this?
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Old 26th October 2006, 13:40   #2
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When I was in college i was driving on a twisty road in my 87 Supra Turbo (great car until the turbo blew ) and I heard a loud bang. I pulled over and the rear tire was flat. I changed the tire and looked at the tread which looks exactly like yours. Half of the tire had tread, the other half was worn down to the steel. The rear alignment was way off. I think you might have the same problem. I would get it checked out. Also, I would not use that tire as its going to blow out on you. Just my 2 cents. Good luck.
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Old 26th October 2006, 18:59   #3
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That is pretty typical. If you look how BMW's "sit" the camber of the rear tyres wears this way. Yours seems to be a little more extreme that I have experienced.

g
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Old 26th October 2006, 19:28   #4
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Too much negative camber... good conering on the track but the outcome is the inside wears out first.
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Old 26th October 2006, 20:23   #5
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Could also be that with wear the suspension is starting to sag. If you take it to BMW they will do the whole sandbag thing and then check the camber. They can adjust the negative camber so you still have camber but it is not so harsh on the inside of your tires. Often times it is because the suspension needs to be adjusted.
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Old 26th October 2006, 21:24   #6
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You need to have your "toe" set to zero. If that doesnt work, you need camber plates.
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Old 26th October 2006, 21:42   #7
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Quote:
Originally Posted by E55AMG2
You need to have your "toe" set to zero. If that doesnt work, you need camber plates.
Thought the rear had some camber adjustment. For less tire wear, take it down to about 1 degree, or the lowest amount the specs call for. I use a much too aggressive 2.2, should prob be more like 1.5, but the rear sure does stay planted!
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Old 26th October 2006, 22:03   #8
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Quote:
Originally Posted by Kin Mak
Too much negative camber... good conering on the track but the outcome is the inside wears out first.
Disagree.

You can have your camber perfect and if your toe and cross toe is off you will absolutely scrub the inner edge down to the cords very quickly!

Do not be satisified with "it is within BMW specs"... have the alignment set for minumum wear- close to minimum toe in.

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Old 26th October 2006, 23:15   #9
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To get more of those tires try switching your tires every couple of thousand miles... (side to side if your running staggered setup) ...
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Old 26th October 2006, 23:20   #10
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Seems like with the directional tires these days you cant even go side to side.
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