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      10-01-2016, 01:03 PM   #1
Kief
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Factory Alignment 20"

Hi Guys,
Just noticed a nail (in the shoulder cannot be repaired) in my LR tire (20" DWS)--bad luck as I replaced this tire about a year ago due to another nail!

Anyway, when I was measuring the tire depths on the remaining 3 tires, in order to determine if I could get a way with replacing just the one tire (so long as there isn't more than 4/32nds from the other tire tread depths), I noticed crazy uneven wear on each tire. We all know BMW is notorious for negative camber and the insides wear faster, but readings from the same tire could range from as low as 5/32 to 9/32! I measured each tire at four different places.

My question is have folks with 20" tires experienced out of spec alignments from the factory like those of us familiar with the E70 experienced? I searched and found many skeptics about out of spec alignments coming from the factory, but this was unfortunately the case for many of us with our E70s and the 20" tires.

Back to the tire, I guess I'll be overly cautious and replace all 4 tires if I were to go with the lowest depth reading 5/32 as that would be too great a difference with a new 10/32 Conti DWS. Plus, Tire Rack is covering the one tire replacement thanks to their n/c road hazard insurance and they no longer carry the DWS in our 315 size. Not sure mixing the DWS with their latest DWS06 would be wise depending on how much different the tread pattern is between the tires.
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      11-01-2016, 10:57 AM   #2
SJCFlyer
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Keif, we've experienced the exact opposite in our 'll X5d with 20" The fronts wore extraordinarily evenly, the rears nearly so (center of the tire wore slightly faster, but it's what you'd expect with a tire that wide with centrifugal force and all). Note that we are running non-runflats (Michelin Sport Pilots), in a pretty even mix of freeway & city. I think we got nearly 30~35k on the first set, and we're over that for the second set and don't yet need to replace.
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      11-01-2016, 12:40 PM   #3
BMWSRT
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Same here. Just changed mine and had even wear
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      11-01-2016, 04:07 PM   #4
P1
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Just measured my P Zeros, both front and back. They are wearing pretty evenly so far. I'm switching to Michelin Super Sports soon, so we'll see how they do.
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      11-01-2016, 05:27 PM   #5
ramsal
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Had the same issue, see my post here: http://f15.bimmerpost.com/forums/sho....php?t=1303263

As part of my ordeal I was informed that the car can tolerate more wear difference front to back than side to side, which makes sense.
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      11-01-2016, 07:50 PM   #6
alphaod
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Quote:
Originally Posted by Kief View Post
Not sure mixing the DWS with their latest DWS06 would be wise depending on how much different the tread pattern is between the tires.
Recently replaced two tires on a Cayenne Turbo that now has mixed DWS/DWS06 tires, and does not seem have affected the driving dynamics of the car.
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