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#1
02-27-2024, 02:07 AM
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Tire Combo for Staggered Wheels
Question is, is it safe to use 275/45r20 for the fronts and maintain the 315/35r20 for the rears? Last edited by RML; 02-27-2024 at 02:42 AM. 
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#2
02-27-2024, 11:35 AM
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Tire Combo for Staggered Wheels
    Short answer is no. 3.4% size difference is way too much for x-drive. Tires need to be within 1% If you bump the rear up to 40 ratio it's under 1%. https://tiresize.com/calculator/
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2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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#4
02-27-2024, 11:49 PM
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Or find some 315/40/20
Sent from my iPhone using Tapatalk Pro
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2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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#5
02-28-2024, 01:23 AM
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Quote 'safe' or not... the centre diff is an open style, and aided with ABS traction control. if your centre diff was fully locked at all times, you would need identical OD tire sizes. now, I'm not specific with the xdrive, but the centre diff in the 4.6is is pretty simple so that's all i can speak too.
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2003 4.6, esotril blue, over 215,000KM. Every previous owner failed to keep up the vehicle maintenance. Restoration project.
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#6
02-28-2024, 02:19 AM
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E70. All are x-drive and will not tolerate 3% difference in rolling circumference.
The open diff on e53 could handle it but the abs won't tolerate the front and back axles turning at different effective speeds
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2011 E70 • N55 (me) 2012 E70 • N63 (wife)
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