Quote:
Originally Posted by M2Sky
I run 20’s all round I used my stock rear tires on the front as my rears are 295 now. No rubbing. Didn’t feel any difference from the switch.
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The thing is that BMW designed the rest of the suspension around the 19" front wheels (and the resulting sidewall height) and vice versa.
As always, maintaining absolute correct factory wheel offset is essential in any non-stock wheel choice because incorrect offset messes up the kinematics of the suspension itself. BMW M engineers go to great length in ensuring that each suspension components (and wheels/tire) componenets work synergistically with the others. I think way too many folks overlook that.
I also think many overlook the adverse effects of a "plus" wheel/tire configuration, as detailed in this article:
https://www.caranddriver.com/feature...-wheels-tires/
Best wheel upgrade for these cars is choosing a forged alloy wheel (6061-T6 aluminum is the most common) and keeping all other variables exactly the same as factory spec - offset in particular. This provides for lighter wheels, which in turn reduce unsprung weight, wheel/tire rotational inertia and overall vehicle weight.
