You're going to have to do what the big boys do and strap some knobbies on the back of the bike and get accustomed to changing them when you hit the dirt. Plus you can use them for hula-hoops at the anal vortex thong chant dance.
"Towards the end of the vid, it looks like she may have had a bafflectomy." - MarylandMike
nah, they're no good for offroad but I've spent less than 1% of my total riding time offroad. The bike has been on the track more than on the dirt. I still have a set of Anakees coming too, I'll put them on for touring / exploring.
So far so good. They've lived through a trackday and daily commuting just fine. They're not an offroad tire but then the 919 isn't an offroad bike. They're not my personal first choice for a street tire but that's just my personal choice and is very dependant on the bike and the riding style.
For a 919 that's not doing trackdays I think these tires are just fine so daily riding.
After seeing the Anakees on Mike, and Jet's bike, I was sure that was going to be the next tire on the Strom. My dealer however, is tempting me with the Metzeler Tourance. He just ordered a set for a KLR, and I was equally impressed with it. Not ready to go with something like the Sync yet, as I still enjoy venturing off-road w/ the Strom. I am stepping up to a V rated tire with this change though. A little less mileage, but the improved traction, and reduced rear wheel hop should be a good trade. So far, I have 8,000 miles on the B-Stone Trail wings.
I have run these tires for a few thousand miles no problems. They stick pretty well and even did some slow laps at the track. Stuck very well even at knee dragging speeds. The feedback is nothing like race tires or all out side grip. I recommend them to anyone looking for a sport touring tire.