Quote:
Originally Posted by Prissy
You are right. I just went to build a new bmw that has 18" and if I want to get the cooling pkg, then I must get 19"s.
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It's true that you can't combine 18" wheels and ZTK from the factory. But 18's can definitely fit.
Here's mine, M340i RWD w/ ZTK on its winter setup; BMW-recommended, dealer purchased & installed Pirelli Sottozero's on 18" 796M wheels.
Rotor and caliper clearance looks about the same as with the 792M's.
19" 792M's (front)
18" 796M (front)
Maybe you'd just need to watch the front size & offset? I noticed the front 796M's are 18x7.5 w/25mm offset, vs 792M 19x8 w/27mm. Rears are closer in specs; 18x8.5/40mm vs 19x8.5/40mm.