I have 20'' Vossens on my 545. I got Hankook Evo V12 tires. I also went with a 10.5 width on the rear with a 285 series. I think the ride is significantly better than the stock runflats and the handling is the same if not slightly better.
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Last edited by Bernie@Bimmerfest; 04-29-2015 at 12:19 PM.