halik

Hey Guys,
I'm trying to figure out the winter wheel set up for my S8 - what's the smallest wheels I can fit over the stock brakes?

mishar

Factory "fat five" 18's come with W12 as a spare. So they would fit, but with very small clearance. I had aftermarket 18's that didn't clear front calipers. So it depends on design and material thickness.

19's clear them for sure.

MP4.2+6.0

I have run them on my W12 w/ the same S8 sized brakes; I was getting my 20's refinished so had them on for a while. At least on my W12, the spare that comes with it when equipped w/ 20's (but not 19's) is also a 255/45-18 on a gloss black version of the same five spoke wheel. Neither the slightly larger tire diameter or width of a 275/35-20 fit the spare tire well in the trunk, so they used the factory 18 fitment. For OP, look back there under the trunk floor and you may find the same.

BTW, I have a clean set of factory D3 18's (silver) with OE A/S tires on them for anyone in the SF Bay Area who has interest locally. No TPMS or shipping. Contact me offline via the AW messaging system if interested. Don't use a reply post.