I think they did excellent. I was running pretty hard at times and the Rockers not only hooked up well but also took some hard hits from the rocks with absolutely not cuts or tire damage. Kybodyguy was behind me an told me I was throwing boulders at him and he had to back off. They impressed him too. As far as the extra tire weight goes, I couldn't tell any difference in anything....
Now I'm interested in how fast and how well the tire performs as the wear.. So far, I think they are the best tire for me..very very happy with them