i have 4 stazworks double bead locks with rock rings welded on from stazworks. they are 16.5x10 and the back spacing is dead even in the wheel, so 5". i have mounted on them a set of 39.5" x13.50" x 16.5" iroks, two tires are roughly 98% tread (look new) and the other two i would say are 85%-90%...