Tires wearing uneven - Alignment question
11-24-2009, 10:05 AM
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Hi,
I run 245/35/20 and 275/30/20 on a 2007 550i.
My fronts and rears wear on the inside. I talked to an alignment shop and the guy told me that he can't take out the negative camber in the back because there is no adjustment. Is that true?
I'm mounting four new tires this week.
What alignment specs have you used successfully for 20" staggered set ups and how many miles do you get?
Thanks for your help.
I run 245/35/20 and 275/30/20 on a 2007 550i.
My fronts and rears wear on the inside. I talked to an alignment shop and the guy told me that he can't take out the negative camber in the back because there is no adjustment. Is that true?
I'm mounting four new tires this week.
What alignment specs have you used successfully for 20" staggered set ups and how many miles do you get?
Thanks for your help.
11-24-2009, 10:58 AM
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Set up the rear at no more than neg 2" w/ OEM spec Toe.
I went w/ -1.75 to -1.9 at the back and around -1.6 at the fronts w/ OE toe.
There's an alignment adjustment bolt for the camber above the pivot point of the strut to the wheel hub.
Your alignment guy needs to check that again.
Don't go w/ BMW's recommended camber at the back of -2.3 something if I could remember right.
I went w/ -1.75 to -1.9 at the back and around -1.6 at the fronts w/ OE toe.
There's an alignment adjustment bolt for the camber above the pivot point of the strut to the wheel hub.
Your alignment guy needs to check that again.
Don't go w/ BMW's recommended camber at the back of -2.3 something if I could remember right.
11-24-2009, 01:14 PM
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Originally Posted by BlackBear' post='1061722' date='Nov 24 2009, 03:05 PM
Hi,
I run 245/35/20 and 275/30/20 on a 2007 550i.
My fronts and rears wear on the inside. I talked to an alignment shop and the guy told me that he can't take out the negative camber in the back because there is no adjustment. Is that true?
I'm mounting four new tires this week.
What alignment specs have you used successfully for 20" staggered set ups and how many miles do you get?
Thanks for your help.
I run 245/35/20 and 275/30/20 on a 2007 550i.
My fronts and rears wear on the inside. I talked to an alignment shop and the guy told me that he can't take out the negative camber in the back because there is no adjustment. Is that true?
I'm mounting four new tires this week.
What alignment specs have you used successfully for 20" staggered set ups and how many miles do you get?
Thanks for your help.
11-24-2009, 02:22 PM
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Originally Posted by wanker' post='1061881' date='Nov 24 2009, 05:14 PM
Excessive wear on the inside of your tires is an indication that your suspension (i.e., shocks) are wornout. Do a search of the forum and you'll see the prior discussions on the issue. Bottom line is that if you have more than 50K miles on your car, there is a good chance that your OEM shocks are toast.
BMWs have negative camber in the rear by design to improve handling -- negative camber will cause the inside of the tires to wear out...period. If the rear tires are worn on the inside more than the outside, especially on a BMW, that does not automatically indicate a problem with the suspension!
As far as tweaking the alignment away from factory specs, I can't offer much advise other than to say that YMMV. Just because someone made an adjustment they like does not automatically mean that someone else will agree.
A quick search of the forums yielded many results about alignment, camber, etc. but here are just a couple posts that may help out:
https://5series.net/forums/index.php?s=&...st&p=491428
https://5series.net/forums/index.php?s=&...st&p=131402
https://5series.net/forums/index.php?s=&...st&p=799101
11-25-2009, 08:17 AM
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Originally Posted by wanker' post='1061881' date='Nov 24 2009, 10:14 PM
Excessive wear on the inside of your tires is an indication that your suspension (i.e., shocks) are wornout. Do a search of the forum and you'll see the prior discussions on the issue. Bottom line is that if you have more than 50K miles on your car, there is a good chance that your OEM shocks are toast.
11-25-2009, 09:14 AM
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Originally Posted by Big_Scot' post='1062480' date='Nov 25 2009, 01:17 PM
Sorry thats complete nonsense, My friend has a 2009 X5 and his tires are wearing on the inside at the rear.
11-25-2009, 09:15 AM
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Originally Posted by wanker' post='1062525' date='Nov 25 2009, 02:14 PM
Wow! Complete nonsense? Not really. Talk to a mechanical, heck Google the subject and become educated.
But perhaps I should clarify my response by noting that "excessive wear" on the inside of tires can be an indication of worn shocks. Yes BMW does have a slight camber to its wheels. However, as the shocks become worn the wheels will ride more on the inside causing the uneven wear. Also BMW's OEM shocks don't have great durabilty compared to better after market manufacturers such as Bilstein et al.
Thus if someone is complaining of "excessive wear" on the inside of their tires then my advise is to check the shocks/suspension, that's all...
But perhaps I should clarify my response by noting that "excessive wear" on the inside of tires can be an indication of worn shocks. Yes BMW does have a slight camber to its wheels. However, as the shocks become worn the wheels will ride more on the inside causing the uneven wear. Also BMW's OEM shocks don't have great durabilty compared to better after market manufacturers such as Bilstein et al.
Thus if someone is complaining of "excessive wear" on the inside of their tires then my advise is to check the shocks/suspension, that's all...
11-25-2009, 09:37 AM
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My Ride: 2007 530i. Purchased 6/28/07. Titanium Silver Metallic, Black Dakota Leather, Dark Poplar Trim, Steptronic, Premium Package, Cold Weather Package, Bluetooth, Adaptive Control Xenons. 10/30/07 Added OEM 124s with 245/40/18 & 275/35/18 Michelin Pilot Sport A/S tires. Installed red Cal Covers� from BavAuto. 11/21/07 Added OEM all-weather floor mats (for winter, carpet in summer) and coat rack. 6/26/08 installed M5-style rear spoiler. 6/30/08 put on red reflectors. 8/22/08 Euro turn signal stickers applied. 3/20/09 Installed Shadowline Trim. 3/27/09 Added Matte Black Kidney Grilles from Trinity. 4/03/09 Installed Bimmian Shadow Matte Black 530i Badges. 4/04/09 Installed LED license plate lights from Trinity. 5/01/09 Installed Brabus Interior LED Kit and White Angel Eyes. 5/02/09 Put in Brabus 6K Fogs. 5/14/09 Removed charcoal filter. 5/15/09 Installed light smoke LED side marker lamps from Trinity. 5/21/09 Sprint Booster. 6/12/09 Painted exhaust tips flat black. 6/13/09 Pulled red Cal Covers and painted calipers low gloss black. 6/27/09 RPI Ram Air Scoop from Trinity. 8/15/09 Installed Brabus's silver invisibulbs front and rear. 9/24/09 Installed R-Dash license plate LEDs from Brabaus (John).
This got weird. Where were we again?
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