on my duster i used the champion beadlock just on the outer and i screw the inner. it starts adding up in $ if you do both sides. also it added a considerable ammount of weight with just the one. i dont have any screws on the dart with a 29- 10.5w on it. with out any screews on them the move atleast 1/8" every hit. i need to doo something there. if your going to go double, save your lunch monney and get the welds.