Spacers are absolutely fine, I run 15mm spacers on my track car, hard kerb riding, real abuse, they are H&R hubcentrics, longer tapered bolts, that’s it.
The TT needed a wider track for better handling, I’d run reputable ones on the S8 no problem, H&R, Eibach, Bilstein, etc
Also if you keep 265 or 275 your speedo is still accurate (no margin for error with the 275 btw)
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