Sport mode make for a much stiffer ride to keep the car flatter for cornering.
Originally Posted by HerbP
Take the Run Flats off & you will have a softer ride. You will not have a spare, but most of us don't. I really don't think the sport mode will affect most of the 6 series suspension, maybe the M6's.
'07 650i Coupe - Black Sapphire Metallic
M6 bumpers, skirts & wheels
BMW M Cross Spoke Composite 101 Rims 20"
HUD, Comfort Access