Tires ... Tires ... Tires
Honestly I don't know what's the fuss about wider tires on the GS. 10mm = 0.39 inches, is that gonna make a life and death issue? Wouldn't you trust BMW engineers to gave one their all kinds of analysis on this? Especially when they sell out in 100s of thousands AND make tire manufacturers to make specific tire. I know if I had to designs something I will exhaust all available resources at my disposal and do all sort of analysis. So I don't think we ought to be concerned too much about the tires.