Quote:
Originally Posted by edx1
since the front is a /45, why didn't they do 255/45/R18 on the rear instead of 255/40/R18?
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The simple answer is tire diameter. 255/40/18's will have a diameter that is just a bit larger than the 225/45 fronts. 255/45/18's, on the other hand, are more than an inch larger in overall diameter.
Staggered wheels do tend to make vehicles understeer a bit more. But understeer is safe for less skilled drivers, and since the X1 will rarely be tracked it's probably a non-issue for most customers. Plus, there's no denying there is a cosmetic benefit to staggered setups.
I use the staggered 18" OEM setup for fair weather, but just changed to a squared 17" setup for winter.