I think Chris Smith used to run that hub on the rear, ( he may still do). It sounded reall nice, but he rides street and park, there's less stress and torque on the hub than in trials. You can risk it if you like, you neve know, it may be amazing last for ages. But going on experience and everyone elses opinions on the experiences, i'd only go for king or pro II ( they seem to be the best out at the moment.