Found a slightly used set of studded winter tyres on M5 original 408M alloys that I want to use on newly bought M550d F11 (wonderful machine!)
Original 20":
Fronts: 245/35-20 8.5" ET 33
Rears: 275/30-20 9" ET 44
408M 19":
Fronts: 255/40-19 9" ET 32
Rears: 255/40-19 9" ET 25
I've used
http://www.willtheyfit.com/ and come to these conclusions.
First of all they are slightly higher. But only by a few mm.
Fronts:
Poke 75mm 82.3mm
Inset 141mm 146.3mm
= 7.3 mm further out and 5.3 mm further in (wider alloy). Must be ok?
Rears:
Poke 70.3mm 89.3mm
Inset 158.3mm 139.3mm
= 19 mm further out and less inset.
Anyone with some knowledge who can help me?