Just to see what's available in the new front wheel size - 120/70 R19 , I did a search and at present, there is not much of a selection out there. No doubt it will improve ..........
Why would you want to do that? BMW sat down with Michelin and designed the new Anakee 3 around the GS, so it's the perfect all round tyre for the bike. Slapping a road tyre on defeats the object somewhat