Revolver shackles

Climax shackles by superior engineering is an Aust equivalent.
They do provide more wheel travel, but they don't provide more traction. They only work by gravity, not by being forced into contact with the ground by the weight of the vehicle crossing up. Make sense? Tap the throttle whilst the shackle is open and the wheel just bounces. Add to that the fact that they are outlawed australia wide and you're on a hiding to nothing with these shackles. They are good for ramp queens chasing rti numbers and that's about it.