X5 30d - Strange Staggered Setup?

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X5 30d - Strange Staggered Setup?

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08-08-2022, 01:55 AM

ard

Member

Join Date: Mar 2006

Location: Sierra Foothills, California

Posts: 6,765

Going from a 285 (say 40) to a 275/40...

the change is 10mm wider, but 4mm taller- on each side, so 8mm more in diameter...8mm is a lot.

There are some tire calculators that will give you revs/mile for a set of numbers, but each mfg has a bit differnet specs. Not every - for example- 275/40-18 will have the same revs/mile

GL

Oh, BMW OE fitments are pretty solid matches. What does BMW put on their 20 inch rims? That should be fine

edit...but if you already have an oddball set on the front you may never find a good match.

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