Thanks for the replies, the offsets I quoted were given to me by the parts dept at my dealer, figures that they were wrong.
2015 535XI Carb.Black/Black Nappa, Prem Pkgs,
Msport Pkg, M Perf.Pkg, Vent Seats, Tints
2012 535XI , White/Black M Sport PKG,Exec PKG,Tints. Retired
2011 535I, GraphGrey/Oyster, Exec Pkg,Retired.