Just finished a 9500km trip ,all in the mtns, and these bt021's are the best tires i have ever run..excellent traction and the wear has been great. i have 10,000 km, (6200 miles ) on them and they look great. not even half way to the bars and they still are round! I never got more than 10,000 out of my 020's or the dunlops. Very happy and will be picking up another rear for next yr! for what its worth...
i did get to go thru a hr of wicked wind and rain near courdalene on fri..lotsa curves....i kept the speed up near 70mph just to get thru it faster.. bike felt ok, so i cant say if better or not as no experience wiping out on one.. but only time she slid was when i hit a run of sand washing across the road on a curve..back end moved a bit, nearly crapped, but she kept going.. went over lotsa water in the ruts that i couldnt avoid and she seemed fine! guess they work!!