New 19" front tire options coming '13 R1200GS
BMW's 2013 R1200GS will come with 120/70-19 front tires and 170/60-17 Rears. Down the road some other widths may show up for this bike and some other bikes with this size may come on the market.
Our NXs call for a 90/100-19 fronts. One of us wrote on ~ page 56 "Front 100/90-19, way bigger than TW39 but it fit under the fork brace. "
I used a "small and narrow" 70/100-19 knobby for two dual sport events, one very rocky day in Reading PA and one very sandy one in NJ. It did very well despite my 215 lbs.