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  1. #1
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    Member No: 71651 Fredvs79 is an unknown quantity at this point Fredvs79's Avatar
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    Rear tires wearing on the outside

    Hey,
    I have a 95 M3 with 165K miles. Original suspension except for JT Designs rear shock mounts.

    My rear tires are wearing faster on the outside I think. I put on new snows in January and now it looks like the outsides are shallower in tread than the middle/inside according to my coin test. Can anyone think of what I should look into the next time I crawl under her? Or should I just take it in for another alignment.



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    How long ago since the last alignment

    and how long ago for rear trailing arm bushings (RTABs)- in miles of course.
    If everything is tight (RTABs mostly), it sounds like you've got a bit of positive camber, or 0 camber and you drive it hard into turns like most of us do, which would wear snows pretty quickly as they're soft.

    I don't think I've ever aligned my car, bought it at 33k and it has 68k now, wear is fairly even, a bit of wear on the inside rear when I took this last set WAY past when I should have replaced them and consequently drove very cautiously. That's to say, I probably have moderate negative camber in the rear, which works out great overall, as hard cornering wears the outsides, but the negative camber helps even it out to wear a bit on the inside when not cornering.

    I wonder if your shop saw this moderate inside wear and tried to "dial it out" by moving to the more neutral side of the camber spec - just a thought and why I ask how long ago you had the alignment done.
    Good luck,
    ADS

  3. #3
    darrell97m3
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    Re: How long ago since the last alignment

    i'd run at least 40 psi of tire pressure----this has worked the past 500,000 miles on various cars---look for the max pressure on the sidewall----you should check the pressure if you're driving from sea level to high altitudes---and don't forget to carry a tire pressure tester in the car and test at least every two weeks---you'll be amazed at fuel mileage increase---this info is for normal driving only, not racing or autocrossing

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