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Old 08-01-2014, 09:30 PM
Join Date: Dec 2011
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Tread depth variance limit for 4.8i w/ adaptive drive?

Does anyone know the tread depth variance limit specification on the xdrive to prevent damage or vibration to the transfer box? Had to replace the drivers side front tire today, the other 3 have 10000 miles...
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Old 08-02-2014, 02:02 PM
ard ard is online now
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ard is on a distinguished road
up to 50% is fine. Ive run and posted the calculations before, but that is only a few revs per mile difference, which is perfectly acceptable for any differential

10000 miles does NOT tell us tread depth....

generally new they are 10/32...so if the other 3 are 5/32 or more you should be fine.

If you are concerned, replace the pair on an axle and retain the 'good' tire in your garage for the next time it happens. Then you have a used tire to add to 'the other 3' should it recur.

Last edited by ard; 08-02-2014 at 06:18 PM.
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