There are sooooo many damn bolts on these things its amazing they dont all leak. The problem we have had more than any other is the aluminum bolts gauling and breaking off when removing them. The original installer of Justins wheels (befroe he bought the car) apparently didnt anti seize them or torque them properly. When we have to change a tire, we regularly have to drill out 8 to 10 bolts per wheel. Not Hypers fault, installer error as far as we can tell so far. Hyper has very good customer service, and seems to have a great racer support program as well.
For short corse racing where every ounce might be the difference these are the ticket, but for any type of endurance racing I would chose an aluminum beadlock from OMF or Beadlock Specialties.